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A survey of young people's shopping habits in a small city during the summer months of 2009 showed the following: Shoppers aged 12 to 14 years took an average of 10 shopping trips per month and spent an average of $15 per trip. Shoppers aged 15 to 17 years took an average of 11 trips per month and spent an average of $17 per trip. Assume that this city has 1100 shoppers aged 12 to 14 years and 900 shoppers aged 15 to 17 years.
Find the mean amount spent per person per month by shoppers aged 12 to 17 years in this city.
The average public elementary school has 450 students. assume the stand deviation of the distribution is 99. if a random sample of 36 public elementary schools is selected, find the probability that the number of students enrolled is between 445 a..
When we carry out a goodness of fit chi-square test, the expected frequencies are based on the alternative hypothesis
Determine the probability that particular call lasted between 110 and 180 seconds?
State the multiple regression equation. Interpret the meaning of the slopes in the equation. Predict the salary for a 40-year-old male employee with 5 years of experience.
When is a regression equation used? What terms describe the fit of a regression equation to the data? What is the importance of the coefficient of determination (r2)?
The Travel Weekly International Air Transport Association survey asked business travelers regarding the purpose for their most recent business trip.
How many departments would they need to survey to achieve this level of accuracy with 95% confidence?
206 randomly selected light bulbs were tested in a laboratory, 161 lasted more than 500 hours. Find a point estimate of the proportion of all light bulbs that last more than 500 hours.
What is the probability that the project will be completed in 17 months or less?
the finished subassembly 2 must be inspected. A list of activities, their predecessors, and their durations. Draw a project diagram (network) for this project? What is the total project time?
The grade point averages of 10 students are listed below. Find the median grade point average. 3.15, 3.62, 2.54, 2.81, 3.97, 1.85, 1.93, 2.63, 2.50, 2.80
Do you benefit by using a cum sum chart rather than a control chart?
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