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At Lido and Frank Mini Food, customers spend an average of 25 minutes selecting their groceries. The check out time follows a normal distribution with a mean service time of 3 minutes and a standard deviation of 1 minute. Customers arrived at the cashier counter according to a Poisson distribution at the average rate of 8 customers per hour. What is the average time (in minute) a customer would spend in the store?
a. 24
b. 25.55
c. 26.11
d. 29.11
e. None of the above
A sample of 50 male and 50 female infants were put on an experimental infant formula. After two weeks the parents of each infant were asked to fill out a questionnaire concerning infant satisfaction on the formula. One of the questions was "Did Ba..
A multiple choice test with 50 questions is given. Each question has four choices. What is the student's probability of passing if passing is at least 60% correct?
assume 70 of drivers are careful and 30 are reckless.assume further that a careful driver has a 0.1 probability of
Determine the mean production of acorn in the last six years and calculate the standard deviation of data relative to acorn production.
You are given the following data. Test the claim that there is a difference in the means of the two groups. Use = 0.01. State the null and alternate hypotheses
Jolt agrees to replace any connector that fails within 19 months. Out of 500 connectors sold, how many does Jolt expect to replace on average?
Company have MBA degrees. Also, 64 percent of the managers have MBA degrees. Using the probability formulas, find the proportion of employees who either have MBAs or are managers.
question the international chef inc. markets three blends of oriental tea premium duke grey and breakfast. the firm
a basketball team at a university is composed of ten players. the team is made up of players who playthe position of
The airplane will make a successful flight if at least 50 percent of its engines remain operative. For what values of p is a 4-engine plane preferable to a 2-engine plane?
Construct a 95% confidence interval estimate for the population proportion of administrative professionals who prefer cash bonuses.
When modelling E(y) with single qualitative independent variable, number of 0 - 1 dummy variables in model is equal to number of levels of qualitative variable.
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