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1. Suppose we would like to test the hypothesis that mean cholesterol levels of residents of Kalamazoo and Ann Arbor, Michigan, are the same. We know that both populations have the same variance. State the appropriate hypothesis set (null and alternative). What test statistic should be used? 2. Consider a sample of size 5 from a normal population with a variance of 5 and a mean of zero under the null hypothesis. Find the critical values for a 0.05 two-sided significance test of the mean equals zero versus the mean dif- fers from zero.
Suppose you are working with a data set that is normally distributed, with a mean of 300 and a standard deviation of 44. Determine the value of x from the following information.
question the time that it takes to react to the brake lights on a decelerating vehicle is critical in avoiding rear-end
You can just switch on the heater of your swimming pool / sauna / living room etc. But if you want to be calculate what time you should switch it on
Ten people agree to take part in an experiment designed to determine whether a persons weight differs between morning & evening.
Develop a linear regression equation for the given data and forecast how much money Robert will win if he spends $30.
In order to estimate the proportion of families who prefer female baby-sitters to male baby-sitters with an error of at most 8 percentage points and with at least 95 percent confidence, how large a sample should be taken?
a teacher believes that the class scores on a final examination should be approximately normal distributed. if this
Explain your answer to someone who is familiar with the T test for a single sample, but not with the T test independent means.
a supermarket receives a shipment of 20000 cans of beans. the supermarket picks a random sample 100 cans and finds
question 1 scores are obtained from the law school admission test lsat are normally distributed with a mean score of
Are they are positive/negatively correlated - Are they weak or strong correlations - What is the significance value and what does the significance value reveal about the data we have used?
Based on these data, explain whether or not course attendance had any effect on determining of a restaurants violation of health code.
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