Problem 6 –Assume that the population is approximately distributed. The Department of Laborand Employment reported that a person between the ages of 20 and 40 has had anaverage of 9.2 jobs. To see if this average is correct, a statistician selected a sample8 employees between the ages of 20 and 40 and asked how many differentcompanies they had been employed. The results are shown below:8 12 15 6 1 9 13 2At a = 0.05, can it be concluded that the mean is 9.2? Use the P-value method. Also,give one reason why the number of respondents might not have given the exactnumber of jobs that they have been employed.

Given that, the population is approximately normally distributed. The Department of Labor and…

Answered: Problem 6 – Assume that the population…

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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Question 4 Consider the following data set [2, 5, 5, 6, 7, 8, 8, 8, 13]. What is the mean? A. 8 B. 5 C. 6.89 D. 7
Question 2. In Aedirn, a fictional country, it is believed that the natural ratio of girls to boys is 100:105 (48.8% girls). You don't believe the reported figures of the percentage of girls born in Aedirn. So, you counted the number of girls and boys born in 107 randomly chosen recent births and found that there are 50 girls and 57 boys (46.7% girls). Using this data, you want to know whether the ratio, 100:105, is reliable. (a) Select the correct hypothesis. Ho p= 0.488 versus Hap 0.467. : Ho p = 0.467 versus Hap‡ 0.467. Ho p= 0.488 versus Hap‡ 0.488. (b) State the conditions that allow Normal approximation to the sampling distribution of p and check if the conditions are satisfied. (c) Under Ho, what are the mean and variance of p. (d) Test Ho at the significance level a = 0.1.
In this problem, assume that the distribution of differences is approximately normal. Note: For degrees of freedom d.f. not in the Student's t table, use the closest d.f. that is smaller. In some situations, this choice of d.f. may increase the P-value by a small amount and therefore produce a slightly more "conservative" answer.In the following data pairs, A represents birth rate and B represents death rate per 1000 resident population. The data are paired by counties in the Midwest. A random sample of 16 counties gave the following information. A: 12.5 13.2 12.6 12.1 11.4 11.1 14.2 15.1 B: 9.6 14.3 10.7 14.2 13.2 12.9 10.9 10.0 A: 12.5 12.3 13.1 15.8 10.3 12.7 11.1 15.7 B: 14.1 13.6 9.1 10.2 17.9 11.8 7.0 9.2 Do the data indicate a difference (either way) between population average birth rate and death rate in this region? Use ? = 0.01. (Let d = A − B.) What is the value of the sample test statistic? (Round your answer to three decimal places.)
For the description below, what would be of most concern to the researcher? A researcher uses a convenience sample from a small, private high school, but plans to generalize the conclusions of his study to all high schools in the state.
In this problem, assume that the distribution of differences is approximately normal. Note: For degrees of freedom d.f. not in the Student's t table, use the closest d.f. that is smaller. In some situations, this choice of d.f. may increase the P-value by a small amount and therefore produce a slightly more "conservative" answer. In the following data pairs, A represents the cost of living index for utilities and B represents the cost of living index for transportation. The data are paired by metropolitan areas in the United States. A random sample of 46 metropolitan areas gave the following information.
In this problem, assume that the distribution of differences is approximately normal. Note: For degrees of freedom d.f. not in the Student's t table, use the closest d.f. that is smaller. In some situations, this choice of d.f. may increase the P-value by a small amount and therefore produce a slightly more "conservative" answer. In the following data pairs, A represents the cost of living index for utilities and B represents the cost of living index for transportation. The data are paired by metropolitan areas in the United States. A random sample of 46 metropolitan areas gave the following information. Do the data indicate that the U.S. population mean cost of living index for utilities is less than that for transportation in these areas? Use α = 0.05. (Let d = A − B.) (a) What is the level of significance? (b)What is the value of the sample test statistic? (Round your answer to three decimal places.)
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You are given the following data of an engineering experiment: a) Construct a frequency Table in which the data is arranged in an ascending order. b) Calculate : 1. The mean. 2. The median. 3. The mode. The range. (2 decimal places) 302.2 407.5 409.3 413.0 412.5 603.5 601.3 508.8 302.1 302.1 505.1 505.1 604.6 413.2 302.2 302.1 405.6 405.6 303.2 401.2 402.3 603.6 601.3 603.6 506.7 302.1 408.4 410.6 302.2 603.4 604.6 604.6 505.1 302.1 406.7 411.7 801.0 604.6 603.6 509.7 303.2 601.3 303.2 505.1 601.3 702.2 801.0 413.3
Listed to the right are the selling prices (in thousands of dollars) for a sample of 19 lakeside lots in Pinnacle Peak, a vacation home community in the Blue Ridge mountains. 86 61 148 81 39 142 140 65 28 85 90 92 25 50 85 85 82 120 137 Determine the following: a. the first quartile b. the third quartile c. the median
Read the following prompt and complete 3.a and 3.b
A group of 40 students in a library was sampled and the type of laptop they were using was examined. It was found that 16 were using HP, 10 were using Lenovo, 6 were using Dell, 5 were using Microsoft, and 3 were using Apple. a. Use the given information to complete the following table: Laptop Type Frequency Relative Frequency HP % Lenovo c. What proportion of the students use HP? b. How many degrees will the segment representing "Lenovo" have on a pie chart? % d. What is the relative frequency for Apple? Dell Microsoft Apple
In this problem, assume that the distribution of differences is approximately normal. Note: For degrees of freedom d.f. not in the Student's t table, use the closest d.f. that is smaller. In some situations, this choice of d.f. may increase the P-value by a small amount and therefore produce a slightly more "conservative" answer.In the following data pairs, A represents birth rate and B represents death rate per 1000 resident population. The data are paired by counties in the Midwest. A random sample of 16 counties gave the following information. A: 12.5 13.2 12.6 12.1 11.4 11.1 14.2 15.1 B: 9.6 14.3 10.7 14.2 13.2 12.9 10.9 10.0 A: 12.5 12.3 13.1 15.8 10.3 12.7 11.1 15.7 B: 14.1 13.6 9.1 10.2 17.9 11.8 7.0 9.2

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