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Use normal disrtibution of fish lengths for which the mean is 8 inches and the standard deviation is 5 inches. Assume the variable x is normally distributed. What percent of fish are longer than 10 inches? If 200 fish are randomly selected, about how many would you expect to be short than 7 inches?
State the null and alternative hypotheses you would use to test whether the year-end bonuses paid by Jones & Ryan were different from the population mean.
Use this information to construct a probability table, and then calculate each of the following probabilities:
We often hear you can lie with statistics. This is one way of saying statistics can be easily mis-communicated. Find one example of how statistics are mis-communicated and explain why there was a mis-communication and what you would do to correct ..
Operations manager thinks that only 10% of room service orders must take longer than 25 minutes if hotel has good customer service. Does hotel room service fulfil this goal?
For a given confidence interval, what is the interpretation of a 96% confidence level?
If we wanted to shorten the interval of the estimation of the true mean of Saturday sales to a width of $600 in total, what should the size of our sample be to achieve it?
Find out a plausible value r for correlation between vehicle weight and miles per gallon (mpg) shown in the scattergram below?
Assume P1 and P2 move simultaneously. Represent this game in normal form.
What is the likelihood all four of the selected flights arrived within 15 minutes of the scheduled time?
A realtor took a random sample of records of sales of homes from the files maintained by the Albuquerque Board of Realtors.
Suppose that the population of heights of male college students is approximately normally distributed with mean m of 69.09 inches and standard deviation s of 4.71 inches.
Inspect table produced in question 2 above. Comment on relative sensitivity of minimum sample size to actual proportion and to desired half width.
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