2.A survey of 800 registered voters from a population of 800,000 of alleligible voters in a community was conducted in September 1994 of which 456reported that they were against legalized casino gambling in their community.a. [ ] What is the estimate of the proportion P of voters in the community thatwere against legalized casino gambling?b. [ ] Construct a 95% confidence interval for P.c. [ ] Can a valid statistical argument be made that "most people in thatcommunity disapproved of legalizing casinos in the community at thetime?" Justify your answer. May use a significance level of 5%.Page 1 of 51d. [ ] For a follow-up survey, how large a sample should be taken in order toestimate P with a bound of 0.02? Use P = 0.5.

a. To estimate the proportion P of voters in the community that were against legalized casino…

Answered: 2. A survey of 800 registered voters…

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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6. A sample of 100 adult women was taken, and each was asked how many children she had. The results were as follows: Children 0 Number of 24 Women 1 20 2 35 3 13 4 7 5 1 a. Find the sample mean number of children. b. Find the sample standard deviation of the number of children. c. Find the sample median of the number of children. d. What is the first quartile of the number of children? e. What proportion of the women had more than the mean number of children? f. For what proportion of the women was the number of children more than one standard deviation greater than the mean? g. For what proportion of the women was the number of children within one standard deviation of the mean?
Q7
Consider the data set 34 45 27 33 38 41 45 29 30 39 34 40 28 33 36 (a) What is the sample median? (b) Construct a 99% two-sided confidence interval for the population mean.
B. A sample data has a distribution that has a single mode and is strongly positively skewed. An analyst computes three measures of location for this data; the mean, the median and mode. (i) State the largest of these three location measures. (ii) Suggest, with a reason, which would be the best measure of location.
A random sample of 12 students showed the following time (in hours) of sleep 4.5 5 5.5 6 6 7 7.5 7.5 8 9 5 7 What is the best point estimate of the population mean?
1. Stephen would like to check if his claim is true upon knowing that the average grade in Mathematics of his class is at least 85%. He got a sample from his classmates listed as follows: 93, 88 , 90,95 , 83, 85, 77 , 78 , 90, 80 a. What statistical tool is suited to determine if his class is true? Why? b. Assume that the distribution is normal, what would Stephen's conclusion be if the level of significance is 5%?
4. A survey of 499 women for the American Orthopedic Foot and Ankle Society revealed that 38% wear flats to work. a. Find 99% confidence interval for the population proportion of women who wear flats to work.
II. Statistical Data Analysis: Solve each given problem using the appropriate test statistic. 1. A survey of public opinion about the criminal justice system asked respondents to complete the following statement: "The criminal justice system treats offenders...." The researchers found the following distribution of responses by gender of the respondent: Gender of Respondent Female Male Too Lenient 15 40 About Right 50 35 Too Harsh 35 25 a. Is there a relationship between the gender of the respondent and perceptions of punishment severity? Use a 5% level of significance and outline each of the steps required in a test of statistical significance. b. Would your answer be different if the significance level were 0.01? Show the proof of your answer. c. What can you conclude about the relationship between gender and perceptions of punishment severity?
A. Find the sample meanB. Find the sample standard deviation C. Construct a 98% confidence interval for the population mean(please show what numbers you are putting into the formula for part b)
Use the results from a survey of a simple random sample of 1064 adults. Among the 1064 respondents, 69% rated 13 themselves as above average drivers. We want to test the claim that more than 20 of adults rate themselves as above average drivers. Complete parts (a) through (e). A. No. Assuming quality of driving can be quantified, half of all adults must have driving quality less than or equal to the mean. B. Yes. Assuming quality of driving can be quantified, a distribution that is extremely skewed to the right would be the most promising scenario for more than this proportion of adults to have driving quality that is above the mean. C. Yes. Assuming quality of driving can be quantified, a distribution that is extremely skewed to the left would be the most promising scenario for more than this proportion of adults to have driving quality that is above the mean. O D. No. It is impossible to compare the quality of different adults' driving. b. If we use the same significance level to…
a. Determine the value of ‘***’? b. Explain what is meant by Sampling Distribution ofthe Mean in the context of MBA graduates’ startingsalaries? c. What type of distribution will the SamplingDistribution of the Mean for MBA graduates’ startingsalaries follow? Give reasons for your answer. d. What are the available point estimator andestimate of the population mean starting salary? e. Which of these estimators in ‘Part (c)’ above isunbiased? Give reasons for your answer? f. Identify an available point estimate for thepopulation variance? g.

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