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Is there a significant difference between the lengths of front and rear legs of a certain breed of horses. The results of the measurements in inches made in 10 of these animals are:
No. of copies 1 2 3 4 5 6 7 8 9 10
Long. Foreleg 138 136 147 139 143 141 143 145 136 146
Long. Hind leg 142 140 144 144 142 146 149 150 142 148
Perform a hypothesis test, assuming that the data come from a normal distribution.
What were the statistical hypothesis? What statistical test did you use and why? What is the rejection region and critical values? What is the p-value? What decision did you take?
If you select a random sample of 100 sessions, what is the probability that the sample mean is between 7.8 and 8.2 minutes?
The p-value for a test statistic is .085, what is the minimum level of significance required to reject the null hypothesis?
Assume that waiting times are approximately normally distributed. Construct a 98% confidence interval for the population mean of waiting times.
What value will standard deviation σ x of sampling distribution approach? How do two x distributions for sample size n = 50 and n = 100 compare?
The accounting association has 15 members, 10 of which are CPAs. The members are to be selected to study ways to increase membership. What is the probability of all three selected are CPAs?
You decide to predict gasoline prices in different cities and towns in the U.S. for your term project. Your dependent variable is price of gasoline per gallon and your explanatory variables are per capita income
Use a decision tree to describe the possible strategies and the consequences (or payoffs) of each. Show your decision tree.
Determine: SS(xy)Linear correlation coefficient, r. Bar graph below compares mean time in seconds for 7-yr old girls to complete certain task.
The data in the next table resulted from an experiment that used a completely random design. Test the null hypothesis that u1 = u2 = u3, where ui represents the true mean for treament i, against the alternative that at least two of the means differ..
Formulate both a numerical and verbal hypothesis statement regarding your research issue. Perform the five-step hypothesis test on data pertaining to your selection.
A state executive claims that the average number of acres in western Pennsylvania State Park is less than 2000 acres. A random sample of five parks is selected, and the number of acres is shown. At alpha=.01, is there enough evidence to support th..
a bank has the following data on the gender and marital status of 200 customers: single 20 male 30 female, married male 100 female 50,
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