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Identify the null hypothesis, alternative hypothesis, test statistic, P-value or critical value(s), conclusion about the null hypothesis, and final conclusion that addresses the original claim. Use the P-value method. Use the normal distribution as an approximation to the binomial distribution.
Bias in jury selection - it was found that during a period of 11 years in Hidalgo County, Texas, 870 people were selected for grand jury duty, and 39% of them were Americans of Mexican ancestry. Among the people eligible for grand jury duty, 79.1% were Americans of Mexican ancestry. Use a 0.01 significance level to test the claim that the selection process is biased against Americans of Mexican ancestry. Does the jury selection system appear to be fair?
Assume that p-value was 0.07, would you reject null hypothesis of equal mean rates for a Type- I error rate of 5%? (Circle one).
An education expert is researching teaching methods and wishes to interview teachers from a particular school district. She randomly selects ten schools from the district and interviews all of the teachers at the selected schools.
The distribution of diastolic blood pressures for the population of female diabetics between the ages of 30 and 34 has an unknown mean μd and a standard deviation σd = 9.1 mm Hg.
Describe how you would develop a random sample from among students.
The probability that house sales will increase in the next 6 months is estimated to be 0.25. The probability that the interest rates on housing loans will go up in the same period is estimated to be 0.74. The probability that house sales or intere..
The probability of recovery for a certain disease is 0.65 or 65%. If 50 people are stricken, what is the probability that
Use a 0.05 significance level to test the claim that king-size cigarettes with filters have a lower mean amount of nicotine than the mean amount of nicotine in non-filtered king-size cigarettes.
The number of degrees of freedom for the appropriate chi-square distribution in a test of independence is:
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?
A much larger sample would be needed to estimate the proportion of the U.S. Army's 2.4 million active duty and reserve personnel who approved the repeal than would be needed to estimate the proportion of the Marine Corp's 200,000 personnel who fel..
A simple random sample of 6 recent graduates revealed the following information about their weekly incomes. What is the expected value of the average weekly income of all the recent graduates?
Discuss the concept of 'extended family' with Asian and Latino ethnic minorities. Discuss the strengths and weaknesses regarding delivery of social and health services to these groups.
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