5. The high school athletic director is asked if football players are doing as well academically as the other student athletes.From a previous study that the average GPA for the student athletes is 81. The athletic director randomly samples 20football players and finds that the average GPA of the sample is 84 with a sample standard deviation of 7. Is there asignificant change in GPA? Use a 0.05 significance level.MathematicalSentence Form:Form:НоMathematicalSentence Form:Form:НаGivenTest StatisticType of TestHo =Computationdf (if applicable)P-valueConclusion

Solution: Given information: μ0= 81 Population mean x= 84 Sample mean s = 7 Sample standard…

Answered: 5. The high school athletic director is…

MATLAB: An Introduction with Applications

6th Edition

ISBN:9781119256830

Author:Amos Gilat

Publisher:Amos Gilat

Chapter1: Starting With Matlab

Section: Chapter Questions

Problem 1P

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Q2. A telemarketing firm is monitoring the performance of its employees based on the number of sales per hour. One employee had the following sales for the last 20 hours (each entry in the table is the number of sales per hour) 5 4 2 6 7 8 5 4 6 4 4 5 4 5 4 7 8 What are the mean, median, mode, variance and standard deviation of the sales?
12 Kimberly and Alexis began arguing about who did better on their tests, but they couldn't decide who did better given that they took different tests. Kimberly took a test in Math and earned a 76.4, and Alexis took a test in Social Studies and earned a 63.2. Use the fact that all the students' test grades in the Math class had a mean of 76.8 and a standard deviation of 9.9, and all the students' test grades in Social Studies had a mean of 62.6 and a standard deviation of 9 to answer the following questions.a) Calculate the z-score for Kimberly's test grade.z= [Round your answer to two decimal places.]b) Calculate the z-score for Alexis's test grade.
Please choose the correct answer. A box has red marbles, 3 black marbles and 5 blue marbles. A marble is picked at random. what is the total number of possible outcomes? A. 2 B. 3 C. 5 D. 10 8. How would you interpret a very small variance or standard deviation? A. The values of the random variables are equal to the mean. B. The values of the random variable are farther from the mean. C. The values of the random variable are closer to the mean. D. The values of the random variables have no relationship with the mean.
You are interested in seeing whether emotions impact decision making. You have three groups--a happy group, a sad group, and a neutral group. For the happy group there are 5 participants and the mean risky decision making score 5.0 with a standard deviation of 0.7. For the sad group there are 5 participants and the mean risky decision making score 5.4 with a standard deviation of 1.1. For the neutral group there are 5 participants and the mean risky decision making score 5.8 with a standard deviation of 2.8. The sum of squares between samples is equal to 1.6. The sum of squares within samples is equal to 38.0. You calculated the f-ratio above. The corresponding p-value for the f-ratio you calculated is p = 0.78. Is this finding significant?
Mario's weekly poker winnings have a mean of $353 and a standard deviation of $67. Last week he won $185. How many standard deviations from the mean is that?
The sample of five companies in the aerospace industry was surveyed as to their return on investment last year. The results are 21, 17, 6, 21 and 23 Find the sample mean Find the Sample Variance Find the Sample Standard Deviation
A successful basketball player has a height of 6 feet 11 inches, or 211 cm. Based on statistics from a data set, his height converts to the z score of 5.17. How many standard deviations is his height above the mean?
In Statsville there’s a city-wide speed limit of 30 mph.If you are caught speeding the fine is $100 plus $10 forevery mile per hour you were over the speed limit. Forexample, if you’re ticketed for going 45 mph, your fine is100 + 10145 - 302 = +250. Last month all the driverswho were fined for speeding averaged 42 mph with astandard deviation of 7 mph. What were the mean andstandard deviation of the fines?A) $120 and $70 B) $220 and $7C) $220 and $70 D) $220 and $170E) $420 and $70
STATISTICS. Show necessary and complete solutions. Box your final answer. 1. A 15-item quiz were given to the students who were absent on the actual day of the quiz. Those students got 4, 4, 5, 6, 9, 9, 9, 12, 13, 14 and 14. Find the range, mean, median, mode, standard deviation, and variance of this ungrouped data.
Each of a sample of 171 residents selected from a small town is asked how much money he or she spent last week on state lottery tickets. 90 of the residents responded with $0 . The mean expenditure for the remaining residents was $23 . The largest expenditure was $250 --> What is the mode of the data?
One way analysis of variance is used to test for O A. equality of three or more population means O B. equality of three or more sample means OC. equality of three or more population proportions D. equality of three of more population variances Click to select your answer.
(b) Disk drive substrates may affect the amplitude of the signal obtained during readback. A manufacturer compares four substrates: aluminum (A), nickel- plated aluminum (B), and two types of glass (C and D). Sixteen disk drives will be made, four using each of the substrates. It is felt that operator, machine, and day of production may have an effect on the drives, so these three effects were blocked. The design and responses (in microvolts ×10–2) are given in the Table Q2(b) (data from Nelson 1993, Greek letters indicate day): Table Q2(b) Operator 3 Machine 1 4 Cy = 11 Aß = 5 B8 = 9 BB = 8 Dy = 4 Ca = 9 1 Αα8 D8 = 2 Cô = 7 DB = 3 By = 4 2 Βα=2 Ay = 7 CB = 9 3 4 Da = 5 Að = 3 Construct an ANOVA table from this experiment at a 0.05 level of significance. Identify whether the four substrates really have an effect on the drives.

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