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For each of the following datasets, explain whether you would expect the mean or the median of the observations to be higher:
a. In a rural farming community, for each household the number of children is measured.
b. For all households in a large city, yearly household income is measured.
c. For all students in a high school (not just those who were employed), income earned in a job outside the home in the past month is measured.
d. For the coins in someone's pocket that has one-third pennies, one-third nickels, and one-third quarters, the monetary value of each coin is recorded.
A company is filling bags of rock salt to a level of 50 pounds. It believes that all bags are filled correctly, but would like to use a hypothesis test with an alpha of 0.05 to check this belief.
Determine a pipeline system that will connect all 10 cities using the minimum number of miles of pipe, and indicate how many miles of pipe will be used.
A researcher plans a study in which a crucial step is offering participants a food reward. It is important that the three food rewards be equal in appeal.
Among those taking the Graduate Record Exam, 18 people are randomly selected.
Describe 5 data collection techniques in your own words. Explain why the four demographic questions you included in your survey are important and or are of interest to the study.
the respiratory rate per minute in newborns varies according to a distribution that is approximately normal with mean
Find the variance of the sample standard deviation,- assuming that the Xi IID Gaussian random variables with mean µ and variance σ2.
a researcher has developed a new drug designed to reduce blood pressure. in an experiment 21 subjects were assigned
the following data are the temperatures of effluent at discharge from asewage treatment facility on consecutive days43
If the system has failed, it costs us an additional $1000. Compute the expected total cost incurred at time 3.
Now that you are an adult, you decide to test one of the truisms passed along by your mother: "Cheaters never win in the end." You randomly assign a group of 20 children to either cheat or to play fair on a scavenger hunt.
a recent harris poll on green behavior showed that 25 of adults often purchase used items instead of new ones. consider
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