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Public health officials claim that people living in low income neighborhoods have different Physical Activity Levels (PAL) than the general population. This is based on knowledge that in the U.S., the mean PAL is 1.62 and the standard deviation is 0.5. A study took a random sample of 48 people who lived in low income neighborhoods and found their mean PAL to be 1.55. Using a one-sample z test, what is the z-score for this data? (Answer to 2 decimal places)
What is the critical value of z in the previous question? Report the critical value CLOSEST to your calculated z-score. (Answer to 2 decimal places.)
The demand for a product of Carolina Industries varies greatly from month to month. Based on the past 2 years of data, the following probability distribution shows the company's monthly demand.
Among the half that had surgery, 80% showed improvement after three months, but only 54% of those who used the wrist splints improved. what's the standard error of the difference in the two proportions?
the following data represents in thousands the total private and public enrollment levels in grades 9 to 12 in the
When would you use a hypothesis test for the difference in two population proportions at your place of employment?
two boxes a and b. box a contains 4 red balls and 5 white balls box b contains 2 red balls and 3 white balls. an
a lake contains 4 distinct types of fish. suppose that each fish caught is equally likely to be any one of these types.
Construct a 95 percent confidence interval for the population mean. Is it reasonable that the population mean is 28 weeks? Justify your answer
The z-score of 1.33 tells you that Eric's time to get to work is 1.33 standard deviations from the mean.
The use of linear regression is a critical tool for a manager's decision-making ability. Please carefully read the example below and try to answer the questions in terms of the problem context.
The state's smallest animal is a red-tailed gerbil, with a mean weight of 2.5 grams and a standard deviation of 0.25 grams. Assuming that the weights are normally distributed
What is the level of measurement for these items related to the newspaper business?
Construct a 99% confidence interval for the population mean tread wear for this type of tire.
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