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The amount of time people spend in a clothing store is normally distributed with a mean of 18 mins and SD of 4 mins. If a sample of 20 customers is randomly selected. what is this probability they will spend more than 20 mins on average in a clothing store?
suppose that in reality 19.12 of u.s. employees play hooky. a poll was taken of 1010 u.s. employees. the employees
A private medical clinic wants to estimate the true mean annual income of its patients. If the confidence level is 95%, find the required sample size in order to meet the needs.
A sample of size 36 results in a sample mean of 7.1. The value of the test statistic is ____
a river is rising at a rate of 3 inches per hour. if the river rises more than 2 feetit will exeecd flood stage. how
The alternative hypothesis is true. In this case the consumer advocacy group will have, A consumer advocacy group doubts this claim and tests the hypotheses
a survey from teenage research unlimited found that 30 of teenage consumers receive their spending money from part-time
support requests arrive at a software company at the rate of 1 every 40 minutes. assume that the requests arrive as
1. What kinds of statistical data play a role in an auto insurance firm's decision on the annual premium you'll pay for your policy? 2. For each of the following, indicate the scale of mea- surement that best describes the information.
in the basic economic order quantity eoq model a doubling of estimated annual demand would lead to what change in
The annual salary of an electrical engineer is given in terms of the years of experience by the table below. Find the equation of linear regression for the above data and obtain the expected salary for an engineer with 45 years of experience.
a construction company is designing the worlds highest commercial building at the michigan avenue in chicago. in order
A certain brand of shoes comes in 5 different styles, with each style available in 4 distinct colors. If the store wishes to display pairs of these shoes showing all of its various styles and colors, how many different pairs will the store have on..
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