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Test whether the mean rate is less than 6%. Use P-value approach.
A recent article in The Wall Street Journal reported that the 30-year mortgage rate is now less than 6 percent. A sample of eight small banks in the Midwest revealed the following 30-year rates (in percent):
4.8
5.3
6.5
6.1
5.8
6.2
5.6
At the .01 significance level, can we conclude that the 30-year mortgage rate for small banks is less than 6 percent? Estimate the p-value.
Test the hypothesis that there is no difference in the mean scores of Exam 1 and Exam 2 against the alternative that the average is greater for the second exam.
What is probability of selecting 2 families neither had taxes prepared by H&R Block?
Use Chebyshev's theorem to determine what percent of values will fall between 58 and 82 for data set with mean of 70 and standard deviation of 4.
At a = 0.05, what is the test value?
each person received was determined by randomization. For each person who was sent one of the surveys, the researcher recorded whether or not a completed survey was returned.
In an analysis of variance problem involving 3 treatments and 10 observations per treatment, SSE = 399.6. The MSE for this situation is:
Supposing a linear relationship, use the least squares method to find the regression coefficients b 0 and b 1 .
Increasing the confidence-interval level from .95 to .99
At 95% confidence, test to determine if more than 21% of the population will like the new soft drink.
To find out whether the course is effective in increasing sales, the appropriate set of hypothesis for testing is:
Give an example of a hypothesis test you could perform at work or at home. State what the Null and the Alternative hypotheses would be in your test.
The random variable x is known to be uniformly distributed between 1.0 and 1.5.
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