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Find the sample standard deviation.9, 10, 11, 12, 13

Find the sample standard deviation.12, 13, 14, 15, 16

Find the population mean or sample mean as indicated.Sample: 4, 11, 14, 16, 15

Find the population mean or sample mean as indicated.Sample: 6, 9, 13, 16, 16

Provide an appropriate response.An Excel printout of some descriptive statistics for a set of data is shown below. What is the IQR? 

Provide an appropriate response.A television station claims that the amount of advertising per hour of broadcast time has an average of 16 minutes and a standard deviation equal to 1.2 minutes. You watch the station for 1 hour, at a randomly selected time, and carefully observe that the amount of advertising time is equal to 20 minutes. Calculate the z-score for this amount of advertising time.

Determine whether the study depicts an observational study or an experiment.A medical researcher obtains a sample of adults suffering from diabetes. She randomly assigns 82 people to a treatment group and 82 to a placebo group. The treatment group receives a medication over a period of three months and the placebo group receives a placebo over the same time frame. At the end of three months the patients’ symptoms are evaluated.

Find the population mean or sample mean as indicated.Sample: 5, 11, 12, 17, 25

Provide an appropriate response.When results from a scholastic assessment test are sent to test-takers, the percentiles associated with their scores are also given. Suppose a test-taker scored at the 88th percentile for their verbal grade and at the  percentile for their quantitative grade. Interpret these results.

Provide an appropriate response.When results from a scholastic assessment test are sent to test-takers, the percentiles associated with their scores are also given. Suppose a test-taker scored at the 85th percentile for their verbal grade and at the  percentile for their quantitative grade. Interpret these results.