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1. Meals. A restaurateur anticipates serving about 180 people on a Friday evening, and believes that about 20% of the patrons will order the chef's steak special. How many of those meals should he plan on serving in order to be pretty sure of having enough steaks on hand to meet customer demand? Justify your answer, including an explanation of what "pretty sure" means to you.
2. Sampling. A sample is chosen randomly from a popu- lation that can be described by a Normal model.
a) What's the sampling distribution model for the sample mean? Describe shape, center, and spread.
b) If we choose a larger sample, what's the effect on this sampling distribution model?
What is the importance of hypothesis testing for independence of variables using two-way tables? Is there an example of this for a better understanding?
Assume that sigma = 60, choose an alpha level, and perform a hypothesis test to determine whether this is good evidence to conclude that the mean score for all young men is less than 275.
Construct a scatter plot, using sales as the dependent variable and median family income as the independent variable. Discuss the scatter plot.
How to find the weight with a height that does not fall on the SD line - Suppose the following girls fell exactly on the SD line. The table below gives their heights, you fill in their weights. (Don't type in "lbs.")
Graph the distribution using a histogram. Calculate the mean and standard deviation.
Determine the estimated regression equation that can be used to predict the star rating given the point values for execution, ease of use, and range of offerings.
What is one of the two differences between the way ZST or ZLT are calculated?
test for single proportion.one kind of plant has only blue flowers and white flowers. according to a genetic model the
Provide an example of a hypothesis test you could perform at work or at home. State what the Null and the Alternative hypotheses would be in your test.
a researcher decides to test her hypothesis that some toys are more fun to play with than others so she decides to
The data from the drive quality tests conducted at DataStor over the past 150 shifts are contained in the file DATASTOR. The Data Description section contains a description of this data file.1.
for a poll 43 of 21944 people polled answered yes to the given question. given that 43 is the best estimate of the
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