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Question: A recent national survey asked adults if they thought the government should continue to fund NASA's efforts to send un-manned missions to Mars. 55% said they should, 40% said they should not, and 5% had no opinion. A sample of 200 college students resulted in the numbers below. At "alpha" = 0.05, can we conclude that opinions of college students differ from those in the national survey of adults?
Response Should Should Not No OpinionNumber 125 70 5
Gives the exact chance the total time is more than 16 minutes. 5) 6.14 Comment on the shape, what distribution is a reasonable t? 6) 6.30 Comment on the shape, same as the stef and leaf?
The manager of a local branch of a bank believes that over the past few years the bank has begun to cater to a different clientele and that the average amount withdrawn from its ATMs is no longer $140.00.
From these we calculate = 129.44; = 122.65; sx = 9.15; sy = 11.02. Perform the test H0: against the alternative H1:, using the two sample t-test, and state any assumptions you may require to do this test.
Suppose among 312 large city residents sampled, 65 refused to cooperate. What is the margin of error at the 95% confidence level.
The bank credit card department of Carolina Bank knows from experience that 5 percent of the card holders have had some high school, 15 percent have completed high school, 25 percent have had some college
A simple random sample of 1600 families is chosen. What is the chance that between 9% and 11% of the sample families will not own car?
the editor of a textbook company is trying to decide whether to publish a proposed business statistics textbook.
If the decision in the hypothesis test of population correlation is to reject the null hypothesis, what can we conclude about the population correlation.
Can the bond rate be predicted by the interest rate? Make the Bond rate the Dependent variable and Prime the independent variable.
Based on the equation of the least-squares line, we use software to predict the average number of home runs hit per game per team for the year 2001. We obtain the following.
A survey covering 0 different suburbs in Dallas found the average price of gasoline to be $3.924 per gallon with a population standard deviation of $0.053. What critical value shoiuld be used to test the claim using a = 0.01?
If appropriate, use the Tukey-Kramer multiple comparisons procedure to determine which file sizes significantly differ with respect to mean access read time. Test at the 95% confidence level.
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