Percentage of arrests - A survey of 750 people aged 14 or older showed that 35 of them were arrested within the last year. Minitab was used to test the claim that fewer than 5% of people aged 14 or older were arrested within the last year. Use the results from the Minitab display and use a 0.01 significance level to test the sta
See attached file for complete formulas. 2. Below is the summary information for the weights (in pounds) of regular Coke and diet Coke cans. Test the claim that cans of regular Coke and diet Coke have the same mean weight at a 0.01 level of significance. Regular Coke Diet Coke n1=36 n2=36 s1=0.007507 s2=0.0004391
1. In the 2000 football season, 247 plays were reviewed by officials using instant video replays, and 83 of them resulted in reversal of the original call. In the 2001 football season, 258 plays were reviewed and 89 of them were reversed. Test the claim that the proportion of plays reversed is different for the 2000 and 2001 s
See attachment for complete problems. Week 1: Quiz: Hypothesis Testing & One sample tests Due on March 8, 2010 in your Individual Forum Directions: For the following one-sample tests, identify the null and alternative hypothesis, and the critical value. Then, calculate the test statistic, note the p value and make a deci
13. For each of the following: (a) State which two populations are being compared (b) State the research hypothesis (c) State the null hypothesis (d) Say whether you should use a one-tailed or two-tailed test and why. i. In an experiment, people are told to solve a problem by focusing on the details. Is the speed of
PROBLEM 1) A marketing firm recently studied the number of times men and women who live alone that buy takeout dinners in a month. Two independent samples were taken one with 50 men and 55 women. The mean is 34.51 for men with a standard deviation of 3.48 and a mean of 29.44 with a standard deviation of 2.86. Conduct a two tai
An economic researcher would like to know whether he can reject the null hypothesis at the 0.10 level, that no more than 20% of the households in Pennsylvania make more than $70,000 per year. a. If 200 Pennsylvania households are chosen at random, how many of them would have to be earning more than $70,000 per year for the r
1. A manufacturer of power meters, which are used to regulate energy thresholds of a data-communications system, claims that when its production process is operating correctly, only 10% of the power meters will be defective. A vendor has just received a shipment of 14 power meters from the manufacturer and 5 have some form of d
In these questions we have to make a decision about the given claim. For example, if the claim is that a coin favors heads and sample results consists of 11 heads in 20 flips, conclude that there is not sufficient enough evidence to support the claim that the coin favors heads. 6) Claim: The proportion of households with tele
Chapter 11 problems 24. Clark Heter is an industrial engineer at Lyons Products. He would like to determine whether there are more units produced on the afternoon shift than on the day shift. A sample of 54 day-shift workers showed that the mean number of units produced was 345, with a standard deviation of 21. A sample of 6
1. A study has been carried out to compare the United Way contributions made by clerical workers from three local corporations. A sample of clerical workers has been randomly selected from each firm, and the dollar amounts of their contributions are as follows. (Use data file XR12027.) Firm 1 Firm 2
You work at a hospital that has always had about 100 emloyees staffed at night. You think that the number of employees staffed at night has recently decreased and would like to test this claim. If you run a hypothesis test, which of the following statements would fit your problem? a) you have a two tail test. b) your alter
See attached data set file. Do countries where the life expectancy is 65 years and older have a higher literacy rate? Describe the results of your test, and explain how the findings from this hypothesis testing can be used to answer your research question. Be sure to include your raw data tables and the results of the comp
Is there a significant difference between the lengths of front and rear legs of a certain breed of horses. The results of the measurements in inches made in 10 of these animals are: No. of copies 1 2 3 4 5 6 7 8 9 10 Long. Foreleg 138 136 147 139 143 141 143 145 136 146 Long. Hind l
Can someone explain this material to me in simple terms? (1) Explain the double-negative logic of hypothesis testing (eg: a scientist fails to reject the null hypothesis). (2) What is the five-step process for hypothesis testing? Is the order important? Why or why not?
Problem 6 The Chamber of Commerce of a Florida community advertises that area residential property is available at a mean cost of $25,000 or less per lot. As a part-time resident, you believe this to be an untrue statement and you seek to test the validity of this claim at the .05 level of significance. You collect a sample o
The yield strength of a metal bolt has a mean of 6,050 pounds with a standard deviation of 100 pounds. Twenty samples of three bolts were tested, resulting in the means shown below. (a) Construct upper and lower control limits for the¯ x chart, using the given product parameters. (b) Plot the data on the control chart. (
A recent study focused on the number of times men and women who live alone buy take-out dinner in a month. The information is summarized below. At the .01 significance level, is there a difference in the mean number of times men and women order take-out dinners in a month? What is the p-value? Statistic
See attached file. An apple juice manufacturer develops a new juice concentrate. This new product is a) more convenient, b) higher in quality, and c) less expensive than conventional apple juice. The marketing manager needs to decide whether advertising should stress convenience, quality, or price. A pilot study is done in th
(a) A statistical study reported that a drug was effective with a p-value of .042. Explain in words what this tells you. (b) How would that compare to a drug that had a p-value of .087?
Please explain how you obtained your results. 1. A student wants their College to offer Kickboxing classes as a Physical Education class. To justify that the class is desired he surveys 200 students and finds that 56% would be interested in taking the class. He goes to his Dean and tells him that based on his survey over h
A recent MBA graduate is trying to decide between two job offers, one in Omaha and one in Kansas City. One factor affecting his decision is the cost of a new home in each city. A recent study sampled 88 new home sales in the Omaha area and found that the mean selling price of a new home was $183,900 with a standard deviation o
23. A real estate agent in the coastal area of Georgia wants to compare the variation in the selling price of homes on the oceanfront with those one to three blocks from the ocean. A sample of 21 oceanfront homes sold within the last year revealed the standard deviation of the selling prices was $45,600. A sample of 18 homes, al
Employee Retention at D&Y Demand for systems analysts in the consulting industry is very strong. Graduates with experience in the consulting business and those who have extensive computer knowledge are getting great offers from consulting companies. Once these people are hired, they frequently switch from one company to ano
Can you provide step-by-step instructions on how do this one in Megastat? 28. Three assembly lines are used to produce a certain component for an airliner. To examine the production rate, a random sample of six hourly periods is chosen for each assembly line and the number of components produced during these periods for eac
1 What is the difference between a null hypothesis and an alternative hypothesis? Is the null hypothesis always the same as the verbal claim or assertion that led to the test? Why or why not? 2 For each of the following pairs of null and alternative hypotheses, determine whether the pair would be appropriate for a hypothesis
Given the following situation, how would you use Megastat to test whether the population defective rate (proportion) is greater than 5%? Please outline the process for the test and, if necessary, include the output from Megastat to explain your approach. What conditions do you need to check to make sure that the analysis is vali
Explain the difference between the null hypothesis and the alternate hypothesis in 150-200 words. How is the null hypothesis chosen (why is it null)? What is the importance of rejecting the null hypothesis in relation of the sample to the population? With a failure to reject the null hypothesis, can we make a general statement a
Discuss the topic of surveys. Address the following: What is the purpose of a survey? What are three examples of a survey and what potential purpose could each be used for? How can one work to ensure the participants of a survey will have their responses kept private? 1. How can one work to ensure that information gaine
A lab technician is tested for her consistency by taking multiple measurements of cholesterol levels from the same blood sample. The target accuracy is a variance in measurements of 1.2 or less. If the lab technician takes 16 measurements and the variance of the measurements in the sample is 2.2, does this provide enough evide