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A fast food restaurant just leased a new freezer and food fryer for three years. The service contract for the freezer offers unlimited repairs for a fee of $125 a year plus a $35 service charge for each repair needed. The restaurant's research indicates that during a given year 80% of these freezers need no repairs, 11% needed to be serviced once, 5% twice, 4% three times, and none required more than three repairs. what are the expected no of repairs per year
A researcher studies the relationship between political attitudes and income. He/she finds that those with higher income are more conservative.
If there are repeated independent trials and there are only two outcomes, what distribution should be used?
Assume that 5% of men and only .25% of women are colorblind. A colorblind person is chosen at random:
A Variable has a mean of 100 and a standard deviation of 16. Four observations of this variable have a mean of 108 and a sample standard deviation of 12. Test whether the sample has been drawn from the population.
The quality control process at a manufacturing plant requires that each lot of finished units be sampled for defective items. Twenty units from each lot are inspected.
At the end of class, our teacher said "If you're perceptive, you may have noticed that a regression analysis produced by the Excel Data Analysis ToolPak contains an ANOVA table.
The following data represents 15 quarters of manufacturing capacity utilization (in percentages) Evaluate three and four quarter moving average for this time series. Which moving average provides the better forecast for the fourth quarter of 2003?
Marketing firm asked the random set of married and single men as to how much they were eager to spend for vacation. At alpha= .05, is a difference in two amounts?
You perform a one sample mean hypothesis test on a random sample of data and observe a p-value of 0.2157. What is the appropriate conclusion? Conclude at the 5% level of significance.
The average score for the sample is M = 76. For the general population of college students, writing scores form a normal distribution with a mean of µ = 70.
Given the following data, use exponential smoothing with a=0.2 and a=0.5 to generate forecasts for periods 2 through 6. Use MAD and MSE to decide which of the two models produced a better forecast.
What is the standard deviation of the sampling distribution of p(hat) the proportion of all rolls of the die that show a 1 or a 2? 3.)
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