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Please use excel when necessary:
1) The GMAT scores of MBA candidates are normally distributed with a mean of 568 and Standard eviation of 25.6 What is the probabilitie of candidates scoring higher than 600 ?
2) A financial Manager is interested to study DM students. A random sample of 256 students salaries totaled $ 9,067,520 The sample standard deviation is $ 3,200
a) What is the point estimate of the students mean salary?
b) What is the point estimate of the standard deviation of the students salaries?
c) Construct a 95% confidence interval for the mean salary of the DM students?
Supposing that both populations are normally distributed, construct a 99% confidence interval for the ratio of the two population variances.
Create the indicated confidence interval for population mean µ using a t- distribution.
This indicates that about 80 out of 100 similarily constructed intervals would include the population porportion. (true or false)
An experiment ws designed to estimate the mean difference in weight gain for pigs fed ration A as compared with those fed ration B. Eight pairs of pigs were used. The pigs within each pair were littermates.
What is the appropriate procedure to test a significant difference in means between the two groups? Use the critical-value method.
Which of these statements is NOT true about CPM and PERT?
At the .01 significance level, can we conclude that there is more variation in the selling prices of the oceanfront homes?
The Acme School of Locksmithing has been accredited for the past 15 years. Discuss how this information might be interpreted as a
The ANOVA summary table below is the result of a regression of sales on year of sales. Is the relationship statistically significant at .05? Comment.
A manufacturer claims that fewer than 6% of its fax machines are defective. In a random sample of 97 such fax machines, 4% are defective. Find the P-value for a test of the manufacturer's claim.
In a binomial distribution n = 8 and π = 0.2. Determine the probabilities of the following events.
How would you interpret the findings of a correlation study that reported a linear correlation coefficient of +0.3?
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