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In a study of vehicle ownership, it has been found that 31% of U.S. households do not own a vehicle, with 50% owning 1 vehicle, and the remaining owning 2 or more vehicles. The data for a random sample of 207 households in a resort community are as follows:
70 owned 0 vehicles, 101 owned 1 vehicle, and the remaining owned 2 or more vehicles.
When testing (at the 5% level of significance) whether the vehicle-ownership distribution in this community differs from that of the nation as a whole what is the test statistic? (please round your answer to 3 decimal places)
Suppose n progeny are to be examined, and let P^ be the sample proportion of purple-owered plants. It might happen, by chance, P^ that would be closer to 1/2 than to 9/16. Find the probability that this misleading event would occur if:
Conduct a two-tailed hypothesis test given the information below. Assuming that the population variances are equal for male and female Grade Point Averages (GPAs), use the following sample data to test.
a survey of 144 retail stores revealed that the average price of a microwave was 375 with a standard error of 20 if 95
a high school math teacher gave her 30 students a math exam. in this exam the average scores for the high school
a semiautomatic popcorn popper is shown. after the unpopped corn is placed in screen s the fan f blows air past the
question if a point inside a sphere is selected at random what is the probability that the point is nearer to the
Make a conjecture as to the value of Pn
Look back at how the data was collected. Describe two flaws or biases with this approach. Suppose that a person calls you back and reports that they miswrote their salary. Instead of $34,000, they meant $340,000.
Derive a simplified version of the above model that includes only the statistically significant variables.
A hockey club has 7 forwards, 5 defensemen, and 3 goalies. Each can play only in his designated subgroup. A coach chooses a team of 3 forwards, 2 defense, and 1 goalie.
the breaking strength of a rivet has a mean value of 10050 psi and a standard deviation of 505 psi.a what is the
In a random survey of 226 college students, 20 reported being only children (with no siblings). Estimate the proportion of students nationwide who are only children.
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