The manager of The Cheesecake Factory in Boston reports that on six randomly selected weekdays, the number of customers served was 120, 130, 100, 205, 185, and 220. She believes that the number of customers served on wee ...

A sample size of 50 is selected from a normal distribution having a mean of 95 and a standard deviation equal to 15. What is the probability of selecting a sample having a mean exceeding 100?

The number of credits being taken by a sample of 13 fulltime college students are listed below. Find the mean, median, and mode of the data, if possible. If any measure cannot be found or does not represent the center o ...

1) Your eccentric aunt has left you $50,000 in Alcan shares plus $100,000 cash. Unfortunately, her will requires that the Alcan stock not be sold for one year and that $60,000 cash must entirely be invested in Tbills wi ...

What would the null and alternate hypothesis be for, " The airlines claim that complaints average less than 15 per month per airport. To investigate the problem an independent watchdog agency contacted a random sample of ...

1. Do outliers increase or decrease the magnitude of correlation coefficients? 2. What impact does reliability have on correlation? 3. Why can't we infer causality from correlation?

Your statistics teacher, knowing the power of sampling, decides to use only 3 of your 5 quiz grades in assigning your grade for the course, chosen at random. Your quiz average using all 5 quizzes is 81.6, with a standard ...

Repeat given Exercise, using the following Aumann model of incomplete information with beliefs: N = {I, II}, Y = {1, 2, 3, 4, 5}, F I = {{1, 2}, {3, 4}, {5}}, F II = {{1, 3, 5}, {2}, {4}} P(ω) = 1/5, ∀ ω ∈ Y. for A = {1, ...

Your company is seeking to forecast demand for the next month based on the information given in the following table: Month May June July Aug Oct Sept Oct Nov Dec Demand 40 44 43 45 42 50 48 54 a. (6) Develop a forecast f ...

Let X have a Poisson distribution with parameter lambda. Show that E(X)= lambda directly from the definition of expected value. [Hint: The first term in the sum equals 0, and then x can be canceled. Now factor out lambda ...

