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A recent study indicated that 29% of the 100 women over age 55 in the study were widows.
a. How large a sample must one take to be 90% confident that the estimate is within 0.05 of the true proportion of women over 55 who are widows?
b. If no estimate of the sample proportion is available, how large should the sample be?
Find the critical value to test the claim that all ages have purchase rates proportional to their driving rates.
Evaluate the data below using the Kruskal - Wallis Nonparametric Hypothesis Test. Explain why you chose this particular nonparametric test to analyze your data.
A national Retail Foundation survey found housholds intended to spend an average of $932 during the December holiday season. Assume that the survey included 850 households and that the standard deviation of the sample is $215.
In relative frequency histogram for a large set of GPAs, the mean and the standard deviation are 2.10 and 0.21 respectively. What proportion of GPAs falls within 1.68 and 2.52?
Develop a linear regression model for these data and forecast carpet sales if 30 construction permits for new homes are filed.
Test the whether the attitude toward keeping weight down associated with smoking status.
What is the probability that a simple random sample of 40 male graduates will provide a sample mean within $10,000 of the population mean, $168,000 (to 4 decimals)?
Construct a stem and leaf plot of the income. what do you predict about the shape of the population distribution. complete the following sentence. Fifty percent of the data falls below $ ______.
This includes knowing how to use an ANOVA for managerial decisions. Present a business example where you would use an ANOVA. State the hypothesis verbally and numerically.
The one time fling. Have you ever bought the article of clothing (dress, sports jacket, etc.) worn item once to a party, and then returned purchase?
Assuming no discrimination based on gender, what is the probability of getting 41 or fewer women when 100 new employees are hired?
In this forum post provide your results also elucidate what they mean in context of your favorite channel. To find 95 percent confidence interval for given data.
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