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In 2004, 65% of adult Americans thought that the death penalty was morally acceptable. In a recent poll conducted by the Gallup Organization, a simple random sample of 1005 adult Americans resulted in 704 respondents stating that they believe the death penalty was morally acceptable when asked, "Do you believe the death penalty is morally acceptable or morally wrong?" (The choices, "morally acceptable" and "morally wrong" were randomly interchanged in the question for each interview.) Is there significant evidence at the 5% level of significance to indicate that the proportion of adult Americans who believe the death penalty is morally acceptable has increased from the level reported in 2004? State the Null Hypothesis and the Alternative Hypothesis 2. Determine the test statistic. 3. Determine the P-value 4. Make a decision regarding the hypotheses based on the P-value and the Level of Significance.
All the pupils took the same achievement test, and the means for groups receiving different methods were compared. What was the dependent variable?
State the values of the coefficient of correlation and coefficient of determination correct to three decimal places
Suppose the probability of a boy being born is the same as the probability of a girl being born. Find the probability that a family with three children will have two boys and one girl.
Explain the difference between independent samples and dependent samples. Classify the following as independent or dependent samples:
A company is interested in estimating μ, mean number of days of sick leave taken by its employees. The firm's statistician randomly selects 100 personnel files and notes the number of sick days taken by each employee.
The distributor selects one cable at random from among all cables in stock. If the cable selected is found to meet the strength specifications, what is the probability that the cable was produced at Plant A?
A law student, who want to check a professor's claim that convicted embezzlers spend on average 12.3 months in jail, takes a random sample of 36 such cases from court files.
The closing price of a company's stock tomorrow can be lower, higher or the same as today's closed. Without any prior information that may affect the price of the stock tomorrow, the probability that it will close higher than today's close is 1/3
A college would like to have an entering class of 1200 students. Because not all students who are offered admission accept, the college admits more than 1200 students.
In a random sample of 16 mountain climbers who are going to attempt Mt. McKinley, what is the probability of each of the following? No more than 12 reach the summit.
Using the information provided, determine the optimal number of clerks to have on duty each Satyrday to minimize the store's total expected cost.
A random sample of n = 4 scores is obtained from a normal population with = 20 and = 4. What is the probability of obtaining a mean greater than M = 22 for this sample?
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