Safegate Foods, Inc., is redesigning the checkout lanes in its supermarkets throughout the country and is...
Safegate Foods, Inc., is redesigning the checkout lanes in its supermarkets throughout the country and is considering two designs. Tests on customer checkout times conducted at two stores where the two new systems have been installed result in the following summary of the data. SYSTEM A: n1=120 xbar1=4.1 sigma1=2.2 SYSTEM 2: n2=100 xbar2=3.4 sigma2=1.5 (1) Test at the .05 level of significance to determine whether the population mean of the system B is lower than 3.5 mins. Use both p-value approach and critical value approach. (2) Test at the .05 level of significance to determine whether the population mean of the system A differs from 4 mins. Use both p-value approach and critical value approach. (3) Test at the .05 level of significance to determine whether the population mean checkout times of the two systems differ.
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Safegate Foods, Inc., is redesigning the checkout lanes in its
supermarkets throughout the country and is...
HyVee is redesigning the check out lanes in it's supermarkets and is considering two designs. Tests...
HyVee is redesigning the check out lanes in it's supermarkets and is considering two designs. Tests on customer checkout times conducted at two stores -- the older stores in Iowa versus the new stores in Illinois -- resulted in the following data: Use Table 1. (Note: the automated question following this one will ask you confidence interval questions for this same data, so jot down your work.) Old Iowa stores New Illinois stores x−1x−1 = 4.1 minutes x−2x−2 = 3.4...
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QUESTION 7 A store manager wishes to compare the service times of the express checkout with...
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Assume that the assumptions and conditions for inference with a two-sample t-test are met. Test the...
Assume that the assumptions and conditions for inference with a two-sample t-test are met. Test the indicated claim about the means of the two populations. State your conclusion.A researcher wishes to determine whether people with high blood pressure can reduce their blood pressure by following a particular diet. Use the sample data below to test the claim that the treatment population mean μ1 is smaller than the control population mean μ2. Test the claim using a significance level of 0.01. Treatment...
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CCN and ActMedia provided a television channel targeted to individuals waiting in supermarket checkout ines. The...
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A manager of a pizza restaurant has changed the restaurant's delivery process in an effort to...
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QUESTION 7 A store manager wishes to compare the service times of the express checkout with the service times of the self-serve checkout. Suppose that independent random samples of 144 customers at express and 100 at self-serve checkouts were selected, and the service times for each customer was recorded. The mean and standard deviation of the sample of customers using the express checkout were 3.7 and 0.9 minutes, respectively. For the self-serve customers, the mean and standard deviation were 4.2...
1. The production supervisor of an assembly line for producing cheeses suspects that the weight of the bags produced is higher than the specification of 200 g She would like to take a simple random sample of bags of cheeses produced by the assembly line and perform a statistic test to confirm that this is indeed the case. (6 points) a. What would be the null and alternative hypothesis for this research? b. What is the type I error in...
CCN and ActMedia provided a television channel targeted to individuals waiting in supermarket checkout ines. The channel showed news, short features, and advertisements. The length of the program was based on the assumption that the population mean time a shopper stands in a supermarket checkout line is 8 minutes. A sample of actual waiting times will be used to test this assumption and determine whether actual mean waiting time differs from this standard. (a) Formulate the hypotheses for this application...
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