27. Which is cheaper: eating out or dining in? The mean cost of a flank steak, broccoli, and ricebought at the grocery store is $13.04 (Money.msn website, November 7, 2012). A sample of100 neighborhood restaurants showed a mean price of $12.75 and a standard deviation of $2for a comparable restaurant meal.a. Develop appropriate hypotheses for a test to determine whether the sample dataport the conclusion that the mean cost of a restaurant meal is less than fixing a com-stsup-parable meal at home.b. Using the sample from the 100 restaurants, what is the p-value?At a = .05, what is your conclusion?Repeat the preceding hypothesis test using the critical value approach.с.||d.

Answered: Which is cheaper: eating out or dining…

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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Consider the relationship between p-values and significance levels. a. Explain why a value of z-statistic that is significant at the 1% level in a one-sided test is always significant at the 5% level. b. Explain why the reverse is not true. If something is significant at the 5% level in a one-sided test it is not necessarily significant at the 1% level.
A recent article in the Journal of Urban Chicken Farmers reported the fraction of chickens that experience severe, moderate, or minor side effects from a new diet are 0.07, 0.15, and 0.78 respectively. Assuming that chickens respond independently, if 18 chickens were tested on the new diet, what is the: 3. a. Mean number of chickens that will suffer severe side effects? b. Variance in the number of chickens that will suffer severe side effects? C.Conditional mean of the number of chickens that suffer severe side effects given that 17 suffer minor side effects.
Using a pooled sample estimator, o , assumes the two populations have O A. different means. O B. the same mean. O C. the same variance. O D. different variances.
Two social scientists wanted to know if more violent crimes are committed when the temperature goes up. They measured the high temperature for each day during the year in Atlanta and compared the temperature for that day to the Police Department’s report for the number of violent crimes for that day. What statistical test should they use to analyze the data? a. Paired t-test b. Correlation c. One Way ANOVA d. Independent Samples t-test e. Chi Square Test of Independence
A marketing director developed a short television commercial to improve the image of a company. The commercial was tested on 20 people. People’s attitudes about the company were measured with a questionnaire when they first came in for the experiment and then again with the same questionnaire after viewing the commercial. Which statistical test would be best to determine if there is a significant difference between measures? one-sample t-test dependent samples t-test independent samples t-test ANOVA
Which is cheaper: eating out or dining in? The mean cost of a flank steak, broccoli, and rice bought at the grocery store is $13.04 (Money.msn website, November 7, 2012). A sample of 100 neighborhood restaurants showed a mean price of $12.75 and a standard deviation of $2 for a comparable restaurant meal. Answer questions 4-7.
Several studies showed that after eating a low-fat cereal for two meals a day, subjects had lost some weight.A cereal companyfinanced this research. Identify what is wrong. Choose the correct answer below. A. Since the research is composed of voluntary response samples, there may be key data points missing. B. The data used in the studies is not reliable because it was not measured by the administrator. C. It is questionable that the sponsor is a cereal company because this sponsor can be greatly affected by the conclusion. D. It is not possible to take accurate measurements.
Compute the measures of central tendency (mean, median, mode) and the measures of variation(range, variance, standard deviation) of the following and provide a detailed explanation of howyou come up with your answer. a. Consider the data as POPULATION 6,8,8,10,10,10,10,10,12,12,14 b. Consider the data as SAMPLE 6,6,6,8,8,10,12,12,14,14,14
To decide between using an independent-samples t test and a paired-samples t test, what question should the researcher ask? a. Is the goal to measure association or to make a prediction? b. Are there more than two levels of the independent variable? c. Is the population mean known? d. Is the research design between-groups or within-groups
A statistician changes her level of significance from .001 to .05. What impact will this change have on her risk of making a Type I and Type II error? Is the change in the level of significance a good decision? Why or why not?
1. Perform the Two-Sample Test for Mean with paired samples for the following: Driving distance and Average Score 2. Perform the One-Way Anova test for all the attributes (variables). 3. Perform the correlation analysis for Golfing Statistics data.

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