Explain what is meant by confounding. what is a lurking variable? what is a confounding variable?
Answer:
A Confounding is the variable that is considered in a research study, and could overall influence the relations between the variables in the study. For example, students wanting to join AP English next semester were told to write a six page essay. When the students turned in their papers and teachers say the difference and grades they believed that the variable was the time that the students handed in the paper. They thought that if the student handed in their paper later than another student that they would receive a lower score, but this was not the case. When asking the students how they prepared for the paper, students replied with different answers. Those who outlined and used other literature for reference scored much higher than those who only used prior knowledge to write their essays. In this study, the lurking variable would be the presence of an outline.
Lurking variable: A variable that is not considered in a research study that could influence the relations between the variables in the study
Confounding variable: A variable that is considered in a research study that could influence the relations between the variables in the study
To Know more about Confounding Variable
https://brainly.com/question/28481575
What is the gradient of a line perpendicular to a line with a gradient of 1/6 ?
Answer:
-6
Step-by-step explanation:
m1 × m2 = -1
(1/6) × m2 = -1
m2 = -6
Help i am so confused and I need this asap!!
Answer:
25 tickets were purchased ahead of time
Explanation and Check part below
Hope this helps :)
Step-by-step explanation:
1)
25
× 11
------
275
2)
625
-275
--------
350
3)
350 ÷ 14 = 25
Check:
350 (dollars from purchased ahead of time)
+275 (dollars from purchased at the door)
--------
$ 625 (total ticket sales stated in the word problem)
If x represents a number, then write an expression
for the product of one more than the number with
one less than the number.
The value of algebraic expression for given is (x + 1)(x - 1)
What is an Algebraic expression?An algebraic expression is one that has been constructed using integer constants, variables, and algebraic operations. A good example of an algebraic expression is 3x2 2xy + c.
A group of phrases containing letters and numbers that are joined using addition (+), subtraction (-), multiplication (*), and division (**) are known as algebraic expressions.
Let the number be x
Expression for given statement will be -
(x + 1)(x - 1)
To learn more about algebraic expressions from given link
https://brainly.com/question/24875240
#SPJ9
A zero-order reaction of reactant a is found to have [a]0=0.25 m. if [a]=0.10 m at t=100. s, what is the rate constant k?
The rate constant K is 0.0015.
Zero-order reaction of reactant a is found to have [a]0=0.25 m and
if [a]=0.10 m at t=100s, then we need to find the rate constant k.
What is the formula for rate constant k?The rate constant, k, is a proportionality constant that indicates the relationship between the molar concentration of reactants and the rate of a chemical reaction
k=([a]0-[a])/t
where k is rate constant,
By the given data we have [a]0=0.25 m
[a]=0.10 m
t=100s
k=?
The rate constant, is a proportionality constant that indicates the relationship between the molar concentration of reactants and the rate of a chemical reaction.
The rate constant is denoted by k.
k=([a]0-[a])/t
Subtract 0.10 from 0.25 and divide it by 100
=(0.25-0.10)/100
=0.15/100
=0.0015
Therefore 0.0015 is the rate constant when a zero-order reaction of reactant a is found to have [a]0=0.25 m and [a]=0.10 m at t=100.
To learn more on rate constant click here:https://brainly.com/question/20305922
#SPJ4
Which ones are the correct answers
The result obtained are-
smallest value = 4.largest value = 48.median = 24first quartile {Q1} = 12third quartile {Q3} = 36What is defined as the frequency table?A frequency table is merely a "t-chart" or two-column table that illustrates the numerous possible outcomes and associated frequencies demonstrated in a sample.
Part 1: Smallest value;
As the frequency table is continuous distribution with a initial value of 4.
Thus, the smallest value of the table is 4.
Part 2: largest value;
As the frequency table is continuous distribution with a final value of 48.
Thus, the largest value of the table is 48.
Part 3: Median
The median is the number in the middle of a sorted list of numbers, and it is more descriptive of the data set than that of the average.
For even number of frequencies.
median = n/2
median = 12/2 = 6
Thus, the 6th term is the median.
median = 24.
Part 4: first quartile {Q1}
When data points are organized in increasing order, the lower quartile, or the first quartile (Q1), is indeed the value at which 25% of them are found.
Thus, Q1 = 12.
Part 3: third quartile {Q3}
When arranged in increasing order, the upper quartile, as well as third quartile (Q3), has been the value at which 75% of data points are found.
Q3 = 36.
The result for the frequency distribution is obtained.
To know more about the frequency table, here
https://brainly.com/question/27820465
#SPJ9
31.693 rounded to the nearest tenth
Answer:
31.7
Rounded to the nearest Tenths Place.
What are the answers to this ? HELP ASAP PLS, this is timed ! Please explain as well !
Answer:
b is the answer
Step-by-step explanation:
did I help you
Triangle ABC with coordinates A (3, 4), B (7, 7), and C (8, 1) is translated 6 units left and 7 units down. What is the new coordinate for Point A'?
The new coordinate for Point A' is A' = (-3, -3)
How to determine the new coordinate for Point A'?The coordinates of the triangle are given as:
A (3, 4), B (7, 7), and C (8, 1)
The translation is given as:
6 units left and 7 units down
This can be represented as:
(x, y) = (x - 6, y - 7)
When the above translation rule is applied on vertex A, we have:
A' = (-3, -3)
Hence, the new coordinate for Point A' is A' = (-3, -3)
Read more about transformation at:
https://brainly.com/question/4289712
#SPJ1
1. √256
O 12
14.
016h
O 18
Answer:
16
Step-by-step explanation:
[tex]16^{2} =256[/tex]
ok, help me out with this one
meeting, so they need at least 100 pieces of sushi in total.
Sofia had already ordered and paid for 24 pieces of sushi, so she needs to order additional sushi. The sushi
comes in rolls, and each roll contains 12 pieces and costs $8.
Let R represent the number of additional rolls that Sofia orders.
1) Which inequality describes this scenario?
Choose 1 answer:
how any tablespoon of kernals per cup of popcorn
Answer:
2 Tablespoons make 4 cups. Popcorn pops to 40 times its original size. One ounce. 2 Tablespoons of kernels makes about 4 cups of popcorn. Four cups of popcorn have 125 calories :))
Authors note:
I really hoped this helped! :)))
-12 / 3 * (-8 + (-4)^2 - 6) +2
simplified please !!
I need it soon please!
ILL GIVE BRAINIEST
i need the steps too
Answer:
-6
Step-by-step explanation:
use PEMDAS
start with the exponent: (-4)^2=16
-12 / 3 * (-8 + 16 - 6) +2
then the parentheses: (-8+16-6)=2
-12 / 3 * 2 +2
next is multiplication/division, division comes first so: -12/3=-4
-4 * 2 +2
then multiplication: -4*2=-8
-8+2=-6
Jubaraj and Kristopher need to buy new pencils for school. Their old pencils are less than 2 inches long. They found a bargain on pencils at a local store. Four pencils cost $1.00, including tax. If the boys buy 12 pencils, how much will they pay?
Answer:
3
Step-by-step explanation:
4 pencil = 1$
we need 12
So: 12÷4=3
3x1$= 3$
|2x-5| < 7
How to solve for x?
Answer:
-1 < x < 6
Step-by-step explanation:
|2x - 5| < 7
-7 < 2x - 5 < 7
-2 < 2x < 12
-1 < x < 6
Greg ate 1/6 of a pizza. afterward, steve ate 1/3 of the remaining pizza. what fraction of the pizza was left after that?
Answer: 1/2
1/3 = 2/6, and 2/6 + 1/6 = 3/6. Since 3/6 can be simplified to 1/2, there would be half of a pizza left.
Here's an image to explain:
When Savannah's parents are away celebrating their anniversary, she gets to sleepover for a week at her grandparents' house. Afterwards, Savannah decides to make her grandparents a photo album of their time together. There are 9 pages in the album. Savannah puts the same number of photos on each page, for a total of 63 photos.
Answer:
7 photos on each page
Step-by-step explanation:
63/9 = 7
She puts 7 photos on each page.
Explain why researchers formulate a null hypothesis in addition to a hypothesis when designing an experimental study.
A null hypothesis outlines what a researcher should see if the tested hypothesis is incorrect. In essence, it presents an "alternative" theory to the first.
What is the null hypothesis?The null hypothesis is a type of hypothesis that explains the population parameter and is used to examine if the provided experimental data are reliable. Depending on whether the population or sample under consideration is viable, this hypothesis is either rejected or not. Or to put it another way, the null hypothesis is a hypothesis that assumes that the sample observations are the result of chance. It is claimed to be a claim made by surveyors who wish to look at the data.
The basic idea behind null hypothesis testing is to gather data and calculate the probabilities of a particular set of data during an experiment on a random sample, presuming that the null hypothesis is correct.
To know more about null hypothesis, visit:
https://brainly.com/question/19263925
#SPJ4
let f (t) be the population (in thousands of people) of math city, as a function the time t (in years), where t
The mean is the population of city in 2026.
What is the short definition of a linear equation?
An algebraic equation of the form y=mx+b is referred to as a linear equation. m is the slope, and b is the y-intercept, and all that is involved is a constant and a first-order (linear) term. The variables in the preceding equation are y and x, and it is occasionally referred to as a "linear equation of two variables."a) From the meaning of title -
f(t) = 3000t + 34000 { from 2020 it will be increase by 300 people
per year}
b) f(b) = 3000 × 6 + 34000
= 18000 + 34000
= 52000
The mean is the population of city in 2026.
Learn more about linear equation
brainly.com/question/11897796
#SPJ4
The complete question is -
Let f(t) be the population (in thousands of people) of Math City, as a function the time t (in years), where t = 0 corresponds to the year 2020. In 2020, the population was 34000, and each year the population increases by 3000 people. (a) Model the population by finding a formula for f(t), using the appropriate choice of a linear, polynomial, power, trigonometric, or exponential function, or a piecewise combination thereof. (b) Evaluate the expression f(6), and write a sentence explaining what this means. (c) Solve the equation f(t) = 64, and write a sentence explaining what this means
What is the solution set for the equation l3x + 2 = 5?
Answer:--------X=3/13---------
Step-by-step explanation:
Which of the following statements about the box-and-whisker plot below is not true? 70 72 74 76 78 80 02 16 O The midrange of the data set shown is 85.5. O Both 72 and 99 are values in the set of data. The median of the data set shown is 81. 94 There are fewer data points in the lower two quartiles than in the upper two quartiles.
The false statement regarding the box-and-whisker plot is given by:
There are fewer data points in the lower two quartiles than in the upper two quartiles.
What is the missing information?The box-and-whisker plot is not given for this problem, but from it, we have that:
The minimum value is 72.Q1: 75.Median: 81.Q3: 90.Maximum: 99.What does a box-and-whisker plot shows?A box and whisker plot shows five things:
The minimum value.The 25th percentile, which is the median of the bottom 50%.The median, which splits the entire data-set into two halfs, the bottom 50% and the upper 50%.The 75th percentile, which is the median of the upper 50%.The maximum value.The false statement is:
There are fewer data points in the lower two quartiles than in the upper two quartiles.
Because 50% values are below the median and 50% are above, meaning that there is an equal number of data points in the lower two quartiles than in the upper two quartiles.
More can be learned about box-and-whisker plots at https://brainly.com/question/27721471
#SPJ1
Hi I need help solving and graphing this. Both in interval and set builder notation as well 4<2y+6<10
Answer:
Step-by-step explanation:
Two irrational numbers that equal to 2. What are they?
The two irrational numbers that sum up to 2 are (√5 - 2) and (4 - √5)
What are irrational numbers?Irrational numbers are numbers that cannot be expressed or written as a quotient of integers.
Example of irrational numbers are; √5 , √7, √3, etc
Irrational numbers that can add up to 2
(√5 - 2) + (4 - √5)
expand the bracket
√5-2 + 4-√5
collect like terms
√5 - √5 -2 + 4
-2 + 4
2
Hence, the two irrational numbers that sum up to 2 are (√5 - 2) and (4 - √5)
Learn more about irrational numbers here:
https://brainly.com/question/20400557
#SPJ1
Point S is located at -10. Points T and U are each 5 units away from point S. Where are T and U located?
For which function is f(5) = 2?
Answer: f = 2/5 (0.4)
Step-by-step explanation:
1. Re-order terms so constants are on the left
f x 5 = 2 OR f(5)=2
2. Divide both sides by the same factor
f(5)=2 --> 5f/5 = 2/5
Splash city water park has 14 different rides. Each customer goes on an average of 8.4 rides, with standard deviation of 2. The distribution of rides customers go on is normal. What percent of the riders go on more than 10 rides? Round to the nearest percent.
Using the normal distribution, it is found that 21% of the riders go on more than 10 rides.
Normal Probability DistributionThe z-score of a measure X of a normally distributed variable with mean [tex]\mu[/tex] and standard deviation [tex]\sigma[/tex] is given by:
[tex]Z = \frac{X - \mu}{\sigma}[/tex]
The z-score measures how many standard deviations the measure is above or below the mean. Looking at the z-score table, the p-value associated with this z-score is found, which is the percentile of X.The mean and the standard deviation are given, respectively, by:
[tex]\mu = 8.4, \sigma = 2[/tex]
The proportion of riders that go on more than 10 rides is one subtracted by the p-value of Z when X = 10, hence:
[tex]Z = \frac{X - \mu}{\sigma}[/tex]
Z = (10 - 8.4)/2
Z = 0.8
Z = 0.8 has a p-value of 0.7881.
1 - 0.7881 = 0.2119 = 21.19% = 21%(rounded to the nearest percent)
21% of the riders go on more than 10 rides.
More can be learned about the normal distribution at https://brainly.com/question/4079902
#SPJ1
Histograms, tables, and pie charts are examples of
A. Data organization
B. Data analysis
C. Data Gathering
D. Data Creation
Answer:
B.DATA ANALYSIS
Step-by-step explanation:
uahvaishsbdiisbd hi isjsbbssihsbsbs
Solve for the value of e.
see picture below!!
Answer:
11
Step-by-step explanation:
90=55+3e+2
33=3e
e=11
Find the mean of the integers: 11, -7, -14, 10, 5
The mean of the integers in the set of numbers is 1
How to calculate the mean ?Mean can be described as the average of a set of numbers
The integers are given as 11, -7, -14, 10 , 5
The mean can be calculated as follows
11 + (-7) + (-14) + 10 + 5/5
= 5/5
= 1
Hence the mean of the integers is 1
Read more on integers here
https://brainly.com/question/13407131
#SPJ1
If 1 can of ketchup contains 13 cups, how many are there in 3.5 cans
Answer:19.5
Step-by-step explanation:
Answer:
Step-by-step explanation:
Answer: 45.5
Step 1: 13 cups x 3.5 can = 45.5 cups