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Hypothesis test for a population mean in Figure 9.10 on page 368 (data file: CreditCd.xlsx): • Enter the interest rate data from Table 9.3 (page 367) into cells A2.A16 with the label Rate in cell A1. • Select Add-Ins: MegaStat: Hypothesis Tests : Mean vs. Hypothesized Value • In the “Hypothesis Test: Mean vs. Hypothesized […]

Computation of the test statistic and p-value: • In cell E7, use the formula = (E3 − E4)/(E5/SQRT(E6)) to compute the test statistic t (= −4.970). • Click on cell E8 and then select the Insert Function button on the Excel toolbar. • In the Insert Function dialog box, select Statistical from the “Or select a category:”

Hypothesis test for a population mean in Figure 9.9(b) on page 368 (data file: CreditCd.xlsx): The Data Analysis ToolPak in Excel does not explicitly provide for one-sample tests of hypotheses. A one-sample test can be conducted using the Descriptive Statistics component of the Analysis ToolPak and a few additional computations using Excel. Descriptive statistics: •

Hypothesis test for a population proportion in Exercise 9.72 on page 375: • Select Stat: Basic Statistics : 1 Proportion • In the “1 Proportion (Test and Confidence Interval)” dialog box, select the “Summarized data” option. • Enter the sample number of successes (here equal to 146) into the “Number of events” window. • Enter

One-Sample Hypothesis Testing Using MINITAB The first instruction block in this section begins by describing the entry of data into the MINITAB data window. Alternatively, the data may be loaded directly from the data disk included with the text. The appropriate data file name is given at the top of the instruction block. Please refer

Do you think that the result in part a has practical importance? Explain your opinion. 9.104: Internet Exercise Are American consumers comfortable using their credit cards to make purchases over the Internet? Suppose that a noted authority suggests that credit cards will be firmly established on the Internet once the 80 percent barrier is broken;

How much evidence is there that μ exceeds 30 mph? 9.102 Consumer Reports (January 2005) indicates that profit margins on extended warranties are much greater than on the purchase of most products.5 In this exercise we consider a major electronics retailer that wishes to increase the proportion of customers who buy extended warranties on digital

THE CIGARETTE ADVERTISEMENT CASE ModelAge Recall that the cigarette industry requires that models in cigarette ads must appear to be at least 25 years old. Also recall that a sample of 50 people is randomly selected at a shopping mall. Each person in the sample is shown a “typical cigarette ad” and is asked to

How much evidence do we have that the industry requirement is not being met? THE CIGARETTE ADVERTISEMENT CASE ModelAge Recall that the cigarette industry requires that models in cigarette ads must appear to be at least 25 years old. Also recall that a sample of 50 people is randomly selected at a shopping mall. Each

THE CIGARETTE ADVERTISEMENT CASE ModelAge Recall that the cigarette industry requires that models in cigarette ads must appear to be at least 25 years old. Also recall that a sample of 50 people is randomly selected at a shopping mall. Each person in the sample is shown a “typical cigarette ad” and is asked to