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The administration of a large university wants to take a random sample to measure student opinion of a new food service on campus. It plans to use a continuous scale from 1 to 100, on which 1 is complete dissatisfaction and 100 is complete satisfaction.
The administration knows from past experience with such questions that the standard deviation for the responses is going to be about 5, but it does not know what to expect for the mean.
It wants to be almost sure that the sample mean is within plus or minus 1 point of the true population mean value. How large will the random sample have to be?
it is known that the white shark grows to a mean length of 22 feet however one marine biologist believes that great
phone calls arrive at the rate of 48 per hour at the reservation desk for regional airways.a. compute the probability
Compute the Pearson correlation. Multiply each X value by 2 and compute the Pearson correlation for the modified scores.
Every year sixth-grade students in Ohio schools take proficiency tests.
Make a stem and leaf graph of the first five rows of the blood cholesterol data in Table (50 observations). Do you see an excess of 0's or 5's?
assuming all sex distributions to be equally probable what proportion of families with exactly six children should be
a company that produces a particular machine component has 3 factories one each in buffalo detroit and pittsburgh. 27
What is the difference between a descriptive model that is developed using multiple regression analysis with time-series data and a model that is considered predictive?
If historical time series data is very limited, what type of forecasting approach would be useful.
For a random sample of 12 days at the Downtown location, the mean number sold was 78.80 and the standard deviation was 14.25. At the .05 significance level, is there a difference in the mean number of hamburgers sold at the two locations?
a real estate research firm monitors the cost of apartment rentals in a large newfoundland city. the mean rental rate
suppose that two 4-sided dice are rolled that is each die has faces with numbers 1 2 3 amp 4. what is the probability
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