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The HR manager of a large department store believes the number of resignations per week of casual staff can be approximated by a normal distribution with a mean 32.5 resignations per week and variance of 49.9 resignations per week squared. From a large amount of historical data available on the HR data base regarding weekly resignations for casuals, a sample of 52 weeks was selected. Between which two values should the middle 90% of all sample averages of resignations per week of casual staff lie? Give only the upper value for this range and state the answer to 2 decimal places.
Calculate degrees of freedom and identify the critical t value for a single-sample t test in each of the following circumstances, and show your work:
Draw a picture of the sampling distribution of the sample mean GPA for a random sample of 100 students.- Find the probability that the sample mean will be 3.15 or greater.
the prices in dollars for a graphing calculator are shown below for 8 online vendors. estimate the population standard
singer suggests that although the right to sell blood does not threaten the formal right to give blood it is
A neighborhood home owners association suspects that the recent appraisal values of the houses in the neighborhood conducted by the county government.
a. Test whether there is a regression relation; use = 10. State the alternatives, decision rule, and conclusion. What does your test imply about ßl ß2, and ß3? What is the P-value of the test?
among drivers who drive daily about 40 have gotten a speeding tickets at one point or another. there is a statistics
find the standard deviations of the random variable. options a 6 b 7 c 10 d
the probability of successfully rehabilitating a convicted criminal in a penal institution is 0.40 . a random sample of
in the very large lecture class chem 115 85 of students passed the first exam. joe did poorly and wants to start a
If an occupation does not require a state-issued license for its practice, can it be considered a profession? Explore some examples that might fall into this category. Are there alternative ways for occupations to elevate their status without prof..
How did you think that your sample would compare to the national mean? This is your hypothesis. State either the alternate or null hypothesis and identify which one you are stating.
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