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A study of church contributions revealed that 15 of 40 families sampled attend church regularly. Construct the 95 % confidence interval for the proportion of families attending church regularly. Should the finite-population correction factor be used? Why or why not?
The following frequency distribution was obtained. The data values are in hours. Construct a histogram for the data .
What sample size would be needed to estimate the true proportion of students at your college
Suppose that sales of lemonade and sales of brownies are independent, determine standard deviation in his revenue.
Based on the answers to a through d, decide whether or not to reject the null hypothesis at the given significance level. Explain your conclusion in the context of the problem.
Multiple choice question using Forecasting techniques. Which among of the following models are best suited to forecast a time series with a stable seasonality component.
At the 5 percent level of significance, can we conclude that the mean weight is greater than 16 ounces? Determine the p-value.
Assume you are using ANOVA to study some phenomenon. There are three treatment levels and a total of 17 people in the study. Complete the following ANOVA table.
Nine percent of undergraduate students carry credit card balances greater than $7000. Presume 10 undergraduate students are selected randomly to be interviewed about credit card usage.
The dimension is supposed to be 224 mm and the variability of the manufacturing process is unknown. Is there evidence that the mean dimension is not 224 mm?
What is your conclusion? Are the two variables independent?
Using the original data, estimate the population standard deviation with 90% probability.
Assuming no discrimination based on gender, what is the probability of getting 41 or fewer women when 100 new employees are hired?
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