This is also given exercise suppose that an observational, Ask an Expert

Statistics

This is also given Exercise. Suppose that an observational study showed that students who got at least seven hours of sleep performed better on exams than students who didn't. Which of the following are possible confounding variables, and which are not? Explain why in each case.

a. Number of courses the student took that term.

b. Weight of the student.

c. Number of hours the student spent partying in a typical week.

Exercise
Suppose that an observational study showed that students who got at least 7 hours of sleep performed better on exams than students who got less than 7 hours of sleep. Which of the following are possible confounding variables, and which are not? Explain why in each case.

a. Number of courses the student took that term.

b. Weight of the student.

c. Number of hours the student spent partying in a typical week.

View complete question

Statistics and Probability, Statistics

Category:- Statistics and Probability
Reference No.:- M92221063

Have any Question?Write your Review or question?

Related Questions in Statistics and Probability

Total cholesterol in children 10 to 15 years of age is

Total cholesterol in children 10 to 15 years of age is assumed to follow a normal distribution of 191 and a standard deviation 22.4. What proportion of children 10 to 15 years of age has total cholesterol between 180 and ...

The weights of ice cream cartons are normally distributed

The weights of ice cream cartons are normally distributed with a mean weight of 20 ounces and a standard deviation of 0.5 ounces. You randomly select 25 cartons. What is the probability that their mean weight is greater ...

With whom should you consult about design strategies to

With whom should you consult about design strategies to improve products/services and why would you consult with these individuals or groups?

The easy clean company just paid a dividend of 150 d0150

The Easy Clean Company just paid a dividend of $1.50 (D0=$1.50). The dividend is expected to grow at a constant rate of 8%. The required rate of return is 11.50%. What is the expected price of Easy Clean stock in Year 5 ...

A project has an initial outlay of 2034 it has a single

A project has an initial outlay of $2,034. It has a single cash flow at the end of year 6 of $4,743. What is the internal rate of return (IRR) for the project? Round the answer to two decimal places in percentage form.

A what is the purpose of credit analysis discuss the

(a) What is the purpose of credit analysis? Discuss the importance of performing a credit analysis if you are suppliers of credit (i.e., commercial banks, non-bank private financing entities).

Research research and sample 5000 household concerning tv

Research research and Sample 5000 household concerning TV shows they watch. Based on the sample 18% reported watching 60 Minutes. What is the 95% confidence interval for the proportion of all Americans that watch 60 minu ...

In a sample of 20 cups of coffee at the local coffee shop

In a sample of 20 cups of coffee at the local coffee shop, the average temperature was 162.5 degrees with a standard deviation of 14.1 degrees. What would be the 95% confidence interval for the temperature of your cup of ...

Monthly water bills for a city have a mean of 10843 and a

Monthly water bills for a city have a mean of $108.43 and a standard deviation of $36.98. Find the probability that a randomly selected bill will have an amount greater than $165, which the city believes might indicate t ...

Lets assume that your tuition not including books and

Let's assume that your tuition (not including books and supplies) for this semester is $7500. If you are taking 5 courses, and each class meets 3 hours a week, what are you paying per hour for your classes? (A typical co ...

4,153,160 Questions Asked
13,132 Experts
2,558,936 Questions Answered

Ask Experts for help!!

Looking for Assignment Help?

Start excelling in your Courses, Get help with Assignment

Write us your full requirement for evaluation and you will receive response within 20 minutes turnaround time.

Ask Now Help with Problems, Get a Best Answer

Recent Questions

Ask Statistics and Probability Expert