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The results of a survey for an airline are shown below
Traveler Male Female Total
Business 57 92 149
Vacation 72 74 146
Total 129 166 295
Use the chart to find the probability that the traveler was
a) male
b) on vacation given the traveler was male
c) female given the traveler was on business
Using one mean t test to determine whether or not to support the claim - hypothesis test that WORKS THE SAME as the z-test
The average for 14 cross-country runners is 172 mg/dl with a standard deviation of 41 mg/dl. Solve using the Traditional Method. Find the p-value for your test statistic. Use an α = 0.05.
In a distribution of scores, the arithmetic mean is 51, the median is 55, and the mode is 62. What is the score, in percentile form, of a subject who does less well than two-thirds of the sample?
Construct a time series plot. What type of pattern exists in the data? Compute the exponential smoothing forecasts for a = .2.
N=120, population standard deviation is (known) 5, alpha =.05, standard error of the mean (sigma of xbar)= .46, h0 is rejected if xbar
A description of how you believe statistics can enrich and represent the results of a study, and an explanation of how statistics can be used to misrepresent the results of a study.
Draw the pmf of the Poisson distribution that results when the parameter α is equal to the following:
The Director of Emergency Medicine at Big Mountain Medical Services is studying patient waiting time. Waiting time is defined as the time from when a patient enters the facility until seen by a physician.
Use Excel and the data to test whether the mean alcohol expenditures for UCM students is equal to that of SBU students using a 1 % level of significance.
Confidence interval for the true mean and Evaluate the 95% confidence interval for the true mean advertising expense?
The local operations manager for the IRS must decide whether to hire 1, 2, or 3 temporary workers. He estimates that net revenues will vary with how well taxpayers comply with the new tax code.
Interpret the meaning of the slopes of the given multiple regression equation
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