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Exhibit (i) The following data show the number of hours worked by 200 statistics students. Number of Hours Frequency 0-9 40 10 - 19 20 - 29 30 - 39 50 70 40 Refer to Exhibit (i). 1.a) The class width for this distribution b). The number of students working 19 hours or less 2.i) Find the critical value for two tailed test with a=0.02 ii) Find area under the standard-normal distribution curve to right of z = -1.24 3. You hypothesize that people who eat junk food will have higher scores on a "health problems" survey (p = 60, o = 8). Random sample of junk food eaters ( n = 25) complete the health problems survey, and they obtain an average score of 62.7. Determine the Z score for this sample mean

Exhibit (i) The following data show the number of hours worked by 200 statistics students. Number of Hours Frequency 0-9 40 10 - 19 20 - 29 30 - 39 50 70 40 Refer to Exhibit (i). 1.a) The class width for this distribution b). The number of students working 19 hours or less 2.i) Find the critical value for two tailed test with a=0.02 ii) Find area under the standard-normal distribution curve to right of z = -1.24 3. You hypothesize that people who eat junk food will have higher scores on a "health problems" survey (p = 60, o = 8). Random sample of junk food eaters ( n = 25) complete the health problems survey, and they obtain an average score of 62.7. Determine the Z score for this sample mean

A First Course in Probability (10th Edition)
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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Exhibit (i) The following data show the number of hours worked by 200 statistics students. Number of Hours Frequency 0-9 40 10 - 19 50 20 - 29 30 - 39 70 40 Refer to Exhibit (i). 1.a) The class width for this distribution b). The number of students working 19 hours or less 2. i) Find the critical value for two tailed test with a=0.02 ii) Find area under the standard-normal distribution curve to right of z = -1.24 3. You hypothesize that people who eat junk food will have higher scores on a "health problems" survey (u = 60, o = 8). Random sample of junk food eaters ( n = 25) complete the health problems survey, and they obtain an average score of 62.7. Determine the Z score for this sample mean 4. A simple random sample of 16 observations from a normal population resulted in a sample mean of 17.25 and a sample standard deviation of 3.3. Develop a 95% confidence interval for the population mean. (Z=1.64) The price of lunch at the mall has a mean of $5.00. The standard deviation is $1.50. Find the following. 5. Probability of spending less than $5.62 Z-score: P(xs5.62):
Transcribed Image Text:Exhibit (i) The following data show the number of hours worked by 200 statistics students. Number of Hours Frequency 0-9 40 10 - 19 50 20 - 29 30 - 39 70 40 Refer to Exhibit (i). 1.a) The class width for this distribution b). The number of students working 19 hours or less 2. i) Find the critical value for two tailed test with a=0.02 ii) Find area under the standard-normal distribution curve to right of z = -1.24 3. You hypothesize that people who eat junk food will have higher scores on a "health problems" survey (u = 60, o = 8). Random sample of junk food eaters ( n = 25) complete the health problems survey, and they obtain an average score of 62.7. Determine the Z score for this sample mean 4. A simple random sample of 16 observations from a normal population resulted in a sample mean of 17.25 and a sample standard deviation of 3.3. Develop a 95% confidence interval for the population mean. (Z=1.64) The price of lunch at the mall has a mean of $5.00. The standard deviation is $1.50. Find the following. 5. Probability of spending less than $5.62 Z-score: P(xs5.62):
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