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Consider the following data from a random sample: 23 12 26 14 20 25 14 11 21 14 25 21 22 21 8 19 17 22 17 16
a.) Construct a stem-and-leaf plot and specify the five-number index (min, Q1, Q2, Q3, & max)
b.) Compute the mean and the standard deviation
c.) Find a 95% confidence interval for the population mean.
suppose instead the data from problem 1 and 4 were taken on the same process thus the data are no longer independent.
Calculate the mean, median, and mode for the below given scores:
As the administrator, you have had numerous complaints from residents and family members. What do you do?
Do the health benefits of alcohol consumption depend on the type of alcohol and the amount consumed? The Harvard School of Public Health reviewed studies investigating the relation between alcohol consumption and health.
For the 13 obese young adults, the researchers reported a correlation of r = .50 between baseline and follow-up physical activity, with an associated p-value of .07. Give a practical interpretation of this correlation coefficient and p-value.
Girls' Weights The weight-for-age for girls of 8 years is 26 kg with a standard deviation of 4.5 kg. How heavy is an 8-yearold girl with a z-score of 20.4?
Is it possible for a process to be in control when its control chart is based on observations from the process but to be out of control when the control chart is based on a specified standard? Explain.
a computer program can make calls to two subroutines a and b. in a randomly chosen run let x be the number of calls to
Assume that your students are a sample of all fourth graders in your state and you can use your student data to test some ideas. What is the major problem with your assumption.
Find the probability and mean and standard deviation for given data under Binomial distribution.
The standard serum cholesterol level for adult males is 200 mg/100 ml with a standard deviation of 16.67 mg. For a sample of 49 overweight men, the mean reading is 211 mg. Is serum cholesterol elevated in overweight men? Use a 0.05 significance..
A metallurgist has designed a way of increasing the strength of steel. She has discovered a chemical that is added to samples of molten metal during.
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