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Based on the 2000 Census, the proportion of the California population aged 15 years old or older who are married is p = 0.524. Suppose n = 1000 persons are to be sampled from this population and the sample proportion of married persons (ρ-hat) is to be calculated. What is the mean of the sampling distribution of ρ-hat?
A) 0.0158
B) 0.0166
C) 0.2494
D) 0.5240
Using the .05 significance level, can we conclude that there is a positive association between the two variables?
High levels of cockpit noise in an aircraft can damage the hearing of pilots who are exposed to this hazard for many hours
A survey found that the variance of the rental rates on 8 cars at the airport was 35.7 while the variance of the rental rates on 5 cars down town was 50.4. What test value should be used in a F test?
Give null and alternative hypotheses for this test in symbolic form.
Assuming that students make their decisions independently, the number who accept has the B (1200, 0.75) distribution. If this number is less than 950, the college will admit students from its waiting list.
Test at 5% significance level null hypothesis that population mean is 40 hours against alternative that it is higher.
What is the probability that they all hit the target?
Determine the confidence interval for population mean and the Superintendent wants to determine the average amount of hours per week the student population studies at home.
He measures the heights of 25 men from this century and finds the mean and standard deviation for his sample.
Suppose that it is a presidential election year and Ohio is one of the 'swing' states. Your polling company wants to conduct a presidential preference poll of the citizens of Ohio to predict which candidate will win the election.
At the .10 significance level, can we conclude that there is a difference in the amounts quoted?
Compute the coefficient of determination for bone loss and women's age and describe what this statistic means.
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