9. You receive a brochure from a large university. The brochure indicates that the mean class size for full-time faculty is fewer than 32 students. You want totest this claim. You randomly select 18 classes taught by full-time faculty and determine the class size of each:35 28 29 33 32 40 26 25 29 28 30 36 33 29 27 30 28 25a) Find the sample mean and sample standard deviation of the data.b) At a = 0.05, can you support the university's claim? (Show entire hypothesis test)

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Answered: 9. You receive a brochure from a large…

A First Course in Probability (10th Edition)

10th Edition

ISBN:9780134753119

Author:Sheldon Ross

Publisher:Sheldon Ross

Chapter1: Combinatorial Analysis

Section: Chapter Questions

Problem 1.1P: a. How many different 7-place license plates are possible if the first 2 places are for letters and...

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2. This is a sample of 10 random seasons in the National Hockey League, Wayne Gretzky scored 50% more points than anyone who ever played professional hockey. He accomplished this amazing feat while playing in 280 fewer games than Gordie Howe, the previous record holder. Here are the number of games Gretzky played during each season.45 70 73 73 74 78 79 80 80 82 a. Find the mean and standard deviation for the data above. (You do not need to show work, use technology as needed especially for standard deviation).b. Find the five-number summary.
Just d
6. The IQ of 8 randomly selected senior high school students are given below. 102 108 125 124 128 120 115 109 Determine the following: a. Sample mean b. Sample variance c. Sample standard deviation.
Q1. The distribution of a sample of 100 women of reproductive age group in a given community is given below: Age group (years) Frequency 15 -19 41 20- 29 32 30 -39 17 40 - 49 10 Total 100 Calculate the mean and standard deviation of the age of this group of women in the community
13. Given the list of the first quarter average of selected fifteen (15) Grade 11 Arts and Design Track students; Find the sample mean, sample variance and sample standard deviation. Xx 86.6 88.1 81.4 89.01 88 93.7 85 86.7 95 89.02 90.03 91 94.07 86 90
Fifteen randomly selected college students were asked to state the number of hours they slept the night before. The resulting data are: 6 16 7 8 7 796 3 11 9 15 4 7 9 a) Find the mean. b) Find the median. c) Find the standard deviation. d) According to Chebysev's Theorem, at least 75% of the times will fall between what two amounts? Is the theorem accurate for this set of data? Why of Why not? e) Are any of the reported hours "unusually" high? Are any of the reported hours unusually low?
We are going to calculate the standard deviation for the following set of sample data by hand. Round all values to 4 decimal places where possible. Note: on the exam you can use the calculator function. The data are: 6,7,6, 15, 15 a) Calculate the mean. x = b) Fill in the table. x x-x (x-x)² 6 7 6 15 15 Total c) Calculate the standard deviation. Standard deviation: S= Σ(α - π)2 n-1 S =
1- If marks of 20 students in one class out of 100 were as the following (Screen shot of tables, figures, and Excel file are required): 62 95 47 57 29 45 74 51 39 70 54 43 73 35 54 20 85 49 a. Find the mean, median and standard deviation of these marks. b. Construct the frequency table using interval width of 10 marks. c. Create a histogram chart (Present data in a method that can be understood by a non- technical audience). d. Find the probability of each age interval and represent that using histogram (Present data in a method that can be understood by a non- technical audience). e. From the graph in part d, find the probability that student get a grade of 70 or less and show how you find that on the figure. 6532
The number of ornaments placed on trees is recorded. The results are as follows: 26 26 22 29 24 30 26 34 21 24 20 31 20 35 32 33 26 26 29 29 Find the Mean, Median, Mode, Midrange, Variance and Standard Deviation of the data.Round to 2 decimal places if necessary. Mean: Median: Mode: Midrange: Variance: Standard Deviation:
Consider the data from the Anthropology 105 class. The mean for women is 64.33 in and the standard deviation is 2.64 in. The average height of men in the US is approximately 5ft 10in. What proportion of women represented here are shorter than the average man?
1. A researcher plans to conduct a survey among students in a public high school. If the population of thisschool is 5,000, find the sample size and the percentage from the N population. (Margin of error is 5%)A = {9,10,11,7,13}B = {10,10,10,10,10}C = {1,1,10,19,19}a. Calculate the mean of each data set.b. Calculate the standard deviation of each data set.c. Which set has the largest standard deviation?
A random sample of 25 Berkeley College students was asked, “How many hours per week typically do you work outside the home?” Their responses were as follows: {0, 0, 15, 20, 30, 40, 30, 20, 35, 35, 28, 15, 20, 25, 25, 30, 5, 10, 30, 24, 28, 30, 35, 15, 15} a. Find the mean, the median and the mode of hours worked outside the home for the sample data. Show all your work to justify your answer. b. Use the above data to complete the following table summarizing the number of hours worked outside the home. Express the relative frequency as a percent. Class Tally Frequency Relative Frequency 0-10 11-20 21-30 31-40 Total c. Find the five-number summary of the hours worked outside of the home by the 25 Berkeley College students.

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