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In a sample of 56 business trips taken by employees in the HR department, a company finds that the average amount spent for the trips was $1,470 with a standard deviation of $480. In a sample of 87 trips taken by the employees in the sales department is $1,675 with a standard deviation of $602. When testing the hypothesis (at the 5% level of significance) that the variance of the amount spent on trips is significantly larger in one department than the other, what is the test statistic?
Although we have not emphasized it, the paired t-test can be used to test hypotheses in which the null value is something other than 0.
if you were given a large data set such as the sales over the last year of our top 1000 customers what might you be
Find the percentage of the area under a normal curve between the mean and the given number of standard deviations from the mean.
Using the internal rate of return as a decision criterion, determine whether or not this proposal should be accepted.
A random sample of 10 miniature Tootsie Rolls were taken from a bag. Each piece was weighed on a very accurate scale. The results in grams were as follows:
Give an example of a null and alternative hypotheses. This can be a personal item or something at work. Additionally, identify the Type I and Type II Errors that could occur with your decision-making process.
Some are red, and the others are white. If Eduardo picks a red ball, he wins $2500; if he picks a white ball, he wins $1000.
The standard error of the estimate can be used to determine a range within which the independent X variables can be predicted with varying degrees of statistical confidence based on the regression coefficients and the value for the Y variable.
Is there any evidence to suggest that the population mean size of quagga mussels is larger in Lake Texoma than in Lake Mead?
Suppose you obtained the heights of ten women and calculated a confidence interval from this information. Without knowing the population mean µ.
Do you have to be a virtuous person to perform a virtuous action? If you do, does this present a problem for Aristotle's account
A candy company claims that 92% of consumers like their candies. To test this claim, 9571 people are selected at random from those who have eaten the company's candies.
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