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A researcher wanted to determine if the average waiting time at the emergency room in a local hospital is greater than 60 minutes. He randomly selected 15 patients at the emergency room facility and recorded their waiting times in minutes. A one sample hypothesis test for the mean was conducted with a resulting p-value of .0275. The researcher used a .01 level of significance for this test. State the null and alternate hypotheses, state whether the null hypothesis should be rejected or not rejected and your reason for that conclusion, state the meaning of that conclusion specifically in terms of the problem being studied.
when comparing the variances of two normally distributed populations using independent random samples the correct test
a computer repair shop gets computers on regular basis for repairs. the repair time between two computers is
a life insurance company has determined that each week an average of eight claims is filed in its nashville branch.a.
Ms. Lisa Monnin is the budget director for the New Process Company. She would like to compare the daily travel expenses for the sales staff and the audit staff. She collected the following sample information.
At the .01 significance level, is there a relationship between job pressure and age?
Using the 50%-34%-14% figures, approximately what percentage of people have a score a) above 40 b) above 45 c) above 30 d) below 45 g) below 30.
The mean serum cholesterol level of 25 men ages 65-74 is 231, with a sample standard deviation of 50. For 25 women of the same age, the mean serum cholesterol level is 255 with a standard deviation of 49. Are the average serum cholesterol levels stat..
find the number of chocolate chips a cookie should contain on the average if it is desired that the probability of a
My question bout How do I use the TINV function within excel to back out the t-statistic for the test? Why did you use the TDIST function? I know ho to use the TINV function, but what does it mean to back out the t-statistic for the test?
What is the 95% confidence interval for the true mean length of the bolt? Assume a normal population distribution.
Profitability at a bank is declining as customers are shifting to other banks. As a researcher, identify the problem (root cause of the symptom) through a scientifically crafted research proposal.
car rental rates per day for a sample of seven eastern u.s. cities are as follows the wall street journal january 16
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