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According to the retail electronics chain, adults in 40 to 50 year old age group, the mean amount spent per year on electronics is $1998. Assume that the amount spent follows a normal distribution with a standard deviation of $550.
a. What percent of adults in this age group spend more than $2500 per year on electronics?
b. What percent spend between $2500 and $3000?
c. What percent spend less than $2000?
Compute average daily rainfall in the week and for weekends. Get the average of weekdays' rainfalls and average of weekend's rainfalls.
Conduct a hypothesis test using the .04 level of significance to determine if there is a difference between the population means.
Show draw a cause-and-effect diagram to organize the possible causes of delayed flight departures into the following maj categories.
Roll a die and record the count of spots on the up face: P(1) = 0, P(2) = 1/6, P(3) = 1/3, P(4) = 1/3, P(5) = 1/6, P(6) = 0.
According to table, which presents a MODI solution for a transportation problem, if that solution is used, which of the following is true.
Find the range, standard deviation, and variance for the scores.
A. Determine the regression equation. B. Determine the estimated sales if 40 contacts are made.
Perform a posthoc test that is suitable if we assume that group 7 is a control group and that the other are different treatment groups and that we are only interested in finding significant treatments, not to compare them.
Explain the meaning of the conditional mean of the dependent variable in the population regression function. Illustrate using an example.
Assuming the nurses surveyed were a simple random sample from the population of all nurses in the United States, find the appropriate null hypothesis for these data
A frequency polygon: does not depend on one variable. True-False
Taking α to be 0.05, what is/are the critical values associated with testing your hypothesis?
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