3. A professor is interested in whether there is a relationship or not between a student's major and amount of sleep. The numbers for each are below. Test if there is a relationship using the .05 level of significance. CV=5.991 Psychology Nursing Other Less than 5 hours 20 30 25 More than 5 hours 15 15 10

Q: Mrs. Smith's reading class can read a mean of 175 words per minute with a standard deviation of 20…

A: Let the random variable x denotes the number of words read per minutes. Given that Mrs. Smith's…

Q: What research decision influences the magnitude of risk of a Type 1 error?

A: The type I error is the error which results in rejecting the null hypothesis when it is true.

Q: What is the value of the standardized test​ statistic?

A:

Q: A consumer advocacy group is doing a large study on car rental practices. Among other things, the…

A: It is given that the mean monthly mileage of cars rented in the U.S. this year is greater than last…

Q: Use 9 steps of hypothesis testing (indicate test to use). Is there any evidence that leadership…

A:

Q: The manager wants the family error rate to be close to 0.05. Suggest a single significance level α…

A: Let , P(S) = α P(N) = 1- α Family error rate for t-tests = Probability of obtaining a significant…

Q: What is the value of z score ? Mean  =142 Standard devaition=2 X =140

A:

Q: assigns a value to a number based on how many standard deviations it stands from the mean and is an…

A: Z-score: It is also called a standard score. It estimates how far a data point is from the mean of a…

Q: What is the sample variance and standard deviation for the data set 9,10,11,33,4 ? Show all work.

A: Given data(x) : 9,10,11,33,4 n = 5 x x2 9 81 10 100 11 121 33 1089 4 16 ∑x=67…

Q: Please answer using the 5 steps, thank you. A certain manager wishes to find out if the proposed…

A:

Q: A child psychologist is investigating if the attention span of 10-year old children is greater than…

A:

Q: A psychologist wants to demonstrate the effectiveness of ACT therapy for the treatment of…

A: Correct option is: B. dependent samples t-test

Q: what measure of variability is to be computed with a median

A: Median is the mid ( second quartile ) of whole data. Median is measure of central tendency.

Q: The Chancellor wants you to calculate the sample size needed with a margin of error of 15, 99%…

A: Since we know population standard deviation, use z-distribution to find z-critical value. Find…

Q: A home improvement company is interested in improving customer satisfaction rate from the 66%…

A: