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A random sample of 35 GMAT scores for applicants to an MBA program has a mean score of 479. The researcher is interested in finding evidence at the .05 level that the mean score of applicants to the program is lower than 500, the national average score. To answer the following questions, assume that the population standard deviation of GMAT scores is 90.
What is the p-value?
What is the correct test statistic?
What is the correct hypotheses?
What if there is a 90% confidence interval for the mean GMAT score of applicants to the program?
What hypothese pair relfects the question above?
in a survey of 2480 golfers 15 said they were left-handed. the surveys margin of error was 3. construct a confidence
To test whether the significant difference between two sample variance using F-tests.
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Discuss three measures of central tendency for the dependent variable. Is this distribution skewed? If so, in what direction? Explain your answer. Why would you NOT attempt to determine the central tendency of the independent variables?
1. the following data show samples of three chain stores in three different locations in one town and the amount of
Over a 20 year period, the average grade point average of applicants to our graduate program has been found to be 3.27. This year the mean grade point average of the 57 students applying to our graduate program is 3.53
Speaking to a group of analysts in January 2006, a brokerage firm executive claimed that at least 70% of investors are currently confident of meeting their investment objectives.
We have been informed that the stock has gone up 20%. What is the probability of a rise or fall in the GDP?
in a trail of 160 patients who received 10-mg doses of a drug daily 40 reported headaches as a side effect. answer a
Determine if there is a linear correlation between annual income and the amount of insurance? What is the linear regression line for this data?
She asks 10 people how many Standard Deviations songs they know. Her data are:
What should the pass mark be set at if 15% are to fail? If the examiner wishes to grant the top 20% A's, what should be the cut-off mark for an A?
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