Suppose that the number of Facebook friends users have is normally distributed with a mean of 126 and astandard deviation of about 51. Assume seventeen individuals are randomly chosen. Answer the followingquestions. Round all answers to 4 decimal places where possible.a. What is the distribution of x? - Nb. For the group of 17, find the probability that the average number of friends is more than 113.c. Find the first quartile for the average number of Facebook friends. Round to 2 decimal places.d. For part b), is the assumption that the distribution is normal necessary? O No Yes

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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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Give the formula for sample mean.
All California 5th graders take a standardized test. The mean for the population of 5th graders is 68.9 and the standard deviation for the population is 10. What is the probability of randomly selecting a student who scored a. ≥ 85? b. less than or equal to 85? c. between 80 & 85? d. between 60 & 85?
SOLVE AND GRAPH THE FOLLOWING. WRITE COMPLETE AND NEAT SOLUTIONS.
You have a uniform distribution whose lowest value is 7 and whose highest value is 15. Find the probability that a randomly selected number from this distribution will be between 9.3 and 10.6.
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Which of the two samples in each set has the higher standard deviation. Answer this question by looking at the data without any computation. Explain your reasoning for each answer. Set 1 – Sample A: 16, 16, 16, 16, 16 – Sample B: 20, 20, 20, 20, 20 Set 2 – Sample A: 16, 16, 16, 16, 16 – Sample B: 15, 16, 16, 16, 16 Set 3 – Sample A: 20, 25, 25, 25, 30 – Sample B: 15, 25, 25, 25, 35 Set 4 – Sample A: 20, 20, 30, 40, 40 – Sample B: 20, 25, 30, 35, 40
A set of five different whole numbers are arranged in order from smallest to largest. The firstand last numbers are decreased by one. Which measure of spread for the set could thischange?a. The range. c. The standard deviation.b. The median. d) all of the above
You draw a card from a deck. If you get a red card, you win nothing. If you get a spade, you win $6. For any club, you win $12 plus an extra $20 for the ace of clubs. Find the standard deviation of the amount you might win drawing a card.
Assume that the readings on the thermometers are normally distributed with a mean of 0° and standard deviation of 1.00°C. A thermometer is randomly selected and tested. Draw a sketch and find the temperature reading corresponding to P34, the 84th percentile. This is the temperature reading separating the bottom 84% from the top 16%. Click to view page 1 of the table. Click to view page 2 of the table. Which graph represents P ? Choose the correct graph below. 84 A. В. OC. D. Ay X The temperature for P84 is approximately (Round to two decimal places as needed.)
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