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A shipment of 1000 small lab mice arrives at the animal care facility with a nominal weight of 10 g per mouse. A sample of 20 mice is selected and weighed. The average weight of the sample is 10.2 g. From past shipments, it is known that the standard deviation of weight among mice is 2 g. Find a 95% confidence interval for the mean weight of all the mice in the shipment.
Selection of a location for a prospective Wal-Mart creates many questions for executives. A suitable site would be one that has an adequate demand for Wal-Mart offerings, sufficient transportation resources, and an available labor force.
A range of values constructed from sample data so that the parameter occurs within that range at a specified probability is:
Do the data in the sample represented in the Excel file support his contention at the .05 level of significance?
If test results over long period of time illustrate that 5% of x values are over 2.1 pounds and 5% are under 1.9 pounds, determine mean and standard deviation for population of products produced with this process?
What is the probability that there will be more than three trucks either being loaded or waiting?
Compute the Return to Risk Ratio (RRR). On the basis of the results of (A) - (C), which action should the vendor take - sell soft drinks or ice cream? Why?
In each month, the proportion of "Prize" bonds that win a prize is 1 in 11000. There is a large number of prizes and all bonds are equally likely to win each prize.
Suppose a random sample of size 64 is drawn from a population with a mean of 277. If 90% of the time the sample mean is less than 280, what is the population standard deviation?
Find out correlation coefficient r, If student take 35 minutes to complete exam, what is his predicted score.
She wants to be 95% confident that her estimate is correct. If the standard deviation is $1050, how large a sample is needed to be accurate within $200?
The weight of a product is normally distributed with a standard deviation of .5 ounces. What should the average weight be if the production manager wants no more than 5 percent of the products to weight more than 5.10 ounces.
Start rolling dice until a particular number, say 3, is obtained, and keep track of how many rolls are necessary. Repeat 100 times. Then find the average.
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