Suppose that the average number of Facebook friends users have is normally distributed with a mean of 122and a standard deviation of about 60. Assume seventeen individuals are randomly chosen. Answer thefollowing questions. Round all answers to 4 decimal places where possible.a. What is the distribution of x? aN(b. For the group of 17, find the probability that the average number of friends is less than 135.c. Find the third quartile for the average number of Facebook friends.d. For part b), is the assumption that the distribution is normal necessary?YesU No

As per our guidelines we can solve first three sub part of question and rest can be reposted.…

Answered: Suppose that the average number of…

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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Refer to the accompanying table, which describes results from groups of 8 births from 8 different sets of parents. The random variable x represents the number of girls among 8 children. Find the mean and standard deviation for the number of girls in 8 births. Click the icon to view the data table. The mean is u = girl(s). (Round to one decimal place as needed.) The standard deviation is o = girl(s). (Round to one decimal place as needed.)
The table below represents a frequency distribution of the heights in centimeters of all 50 members of a club: Height (cm) 160 ≤x≤170 170
The race speeds (in minutes) for the top eight cars in a 200-mile race are listed below. Use the range rule of thumb to estimate the standard deviation. Round results to the nearest tenth.181.0 180.6 189.2 182.2 175.6 180.0 177.9 181.8 Question content area bottomPart 1A.6.8 minutesB.7.5 minutesC.3.4 minutesD.1.1 minutes
A police radar gun is used to measure the speed of cars on a highway. The speeds of cars are normally distributed with a mean of 60 mph and a standard deviation of 10 mph. roughly what proportion of cars are driving between 60 and 70 mph round to the nearest hundredth.
The life span of Duracell batteries is normally distributed. The mean life span is 10,502 hours an the standard deviation is 415 hours. If 66,500 duracell batteries are manufactured, approximately how many of those batteries last at least 9,850 hours? A 39,900 B. 46,600 C. 59,900 D. 62,600
Paul wants to estimate the mean number of siblings for each student in his school. He records the number of siblings for each of 100 randomly selected students in the school. What is the parameter?
The following table shows the number of people that have either 0, 1, 2 or 3 cars registered in their name from a sample of 166 people. Complete the table. xx CountCount 0 45 1 43 2 32 3 46 Find the mean number of cars owned for this sample. Give your answer to at least 2 decimal places. Find the standard deviation of cars owned for this sample. Give your answer to at least 2 decimal places.
Suppose six pet food stores in the area were surveyed, and the following data shows how many types of pet food each of them carries. 7,7,9, 9, 11, 11 Calculate the sample mean and the sample standard deviation. Round your answers to three decimal places. T = Number Number S=
For the sample data 7, 9, 10, 11, 13, 22find the standard deviation ( give your answer in three decimal places). Answer:
A researcher randomly purchases several different kits of a popular building toy. The following table shows the number of pieces in each kit in the sample. Find the mean, the median and the standard deviation of the data. Round your answer to the nearest hundredth, if necessary. 16. Building Toy Pieces 151 36 256 341 341 36 95 287 256 100 161 199
Take the following set of scores and calculate the range, variance, and standard deviation (show your work): 1, 2, 3, 4, 5, 6, 7, 8, 9, 10
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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