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Test the difference between the two normal population means.
Grand Strand Family Medical Center is specifically set up to treat minor medical emergencies for visitors to the Myrtle Beach area. There are two facilities, one in the Little River Area and the other in Murrells Inlet. The Quality Assurance Department wishes to compare the mean waiting time for patients at the two locations. Samples of the waiting times, reported in minutes, follow:
Location
Waiting Time
Little River
31.73
28.77
29.53
22.08
29.47
18.6
32.94
25.18
29.82
26.49
Murrells Inlet
22.93
23.92
26.92
27.2
26.44
25.62
30.61
29.44
23.09
23.1
26.69
22.31
Assume the population standard deviations are not the same. At the .05 significance level, is there a difference in the mean waiting time?
Does the weight of a vehicle affect the gas mileage? The following random sample was collected where x = weight of a vehicle in hundreds of pounds and y = miles per gallon.
Define the rejection region. State the statistical decision.
The only difference is that the first group is comprised of athletic persons and the second of non-athletic ones.
Determine the probability of choosing the area code at random which ends in the odd number if first digit cannot be 1 or 0?
Using WSJ or IBD look up the following stocks: General Electric, General Motors, Microsoft and Intel and answer the following questions for each stock. You may have to refer to several issues of your newspaper for all of the information if the pap..
Using multiple linear regression, compute the regression equation for the following data in Excel.
Determine what analysis would you do on each problem (i.e., one-sample z-test, one-sample t-test, proportion test, two-sample independent t-test, or paired test)?
Describe appropriate treatment means μ1, μ2 and μ3. After that Test for statistically significant differences between these treatment means. Set α = 0.05.
The ANOVA table is given below,as well as a table of means and standard deviations for the three groups. Evaluate the t statistic for testing contrast
At the 0.05 significance level, can Ms. Bridgend conclude that she is earning an average of more than $20 in tips?
What would be your best point estimate for average Sales in weeks for which Newspaper advertising were $1 million? What would be an appropriate interval estimate for this?
A sample of 64 Atlanta consumers showed a mean quarterly water bill of $51 with a sample standard deviation of $12. At α = .05, does the Atlanta sample support the conclusion that above-average rates exist for this private water system?
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