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Demographics and Population Statistics
A study was conducted to compare the population mean age of women at the time of their first marriage. Independent random samples of size 11 were obtained from weddings in three different years. The resulting ANOVA test was significant at the p = 0.003 level. The sample means are given below.
If MSE = 17.68, construct the Tukey 95% confidence intervals to isolate the population mean ages that are significantly different.
Year
1985
1995
2003
Sample Mean
23.3
24.5
25.3
suppose that general motors gm fordf and chryslerc each introduce a new hybrid vehicle.a. general motors keeps 85 of
Write appropriate hypotheses.- Verify that the appropriate assumptions are satisfied.- Find the P-value of this test.- Explain what the P-value means in this context.
Refer to b. All these variables were statistically significant in the stepwise model to predict yield strength. Do you agree with this decision? Explain.
What is the median number of CDs owned? What is the 40th percentile? What is the range of the number of CDs owned? What is the standard deviation of the number of CDs owned?
There are 4000 mangoes in a shipment. It is found that it a mean weight of 15 ounces with a standard deviation of 2 ounces.
Suppose you manage Tennessee Grilled Pork, a fast food restaurant specializing in pork sandwiches and pork chops on a stick. You have decided to build a new restaurant and have 2 possible site locations
Identify the types of variables you would need to conduct a Chi-square (last name begins with A-H), one-sample t-test (last name begins with I-P) and paired t-test (last name begins with Q-Z.
Manual calculations.
the following sample was obtained from a population with unknown parameters.scores 6 12 0 3 4a. compute the sample mean
What is the probability that the mean weight for a sample of 40 trout exceeds 405.5 grams?
Survey was mailed to a total of 400 students; 100 were randomly selected from each of the freshman, sophomore, junior and senior classes last semester. What sampling method was used?
Now suppose he says that if he is optimistic about the success of one project, he is likely to be optimistic about the others as well. For your simulation, this means that if one of the probabilities increases, the others also are likely to increa..
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