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In a random sample of 70 prospectuses in which sales forecasts were disclosed, the mean debt to equity ratio prior to the offering was 3.97 and the sample standard deviation was 6.14. For an independent random sample of 51 prospectuses in which sales earnings forecasts were not disclosed, the mean debt to equity ratio was 4.29. Test against a two sided alternative, the null hypothesis that the population mean to debt ratios are the same disclosers and non disclosers of earnings forecasts.
For full points and my understanding, please show all steps
At the 0.05 significance level, can Ms. Bridgend conclude that she is earning an average of more than $20 in tips?
The data represents the closing value of the Dow Jones Industrial Average (DJIA) over the 29-year period from 1979 to 2007.
Plant B has a standard deviation of 150 model FX32's per day. Which of the plants would you prefer to manage? Explain why you would prefer that particular plant.
Describe a Bernoulli experiment and give two examples. What is the connection between a Bernoulli experiment and a binomial distribution? Explain.
test 1perform the following two-tailed hypothesis test using a .05 significance levelintrinsic by genderstate the null
Describe how you would develop a random sample from among students.
It has been reported that the average US office worker receives 14 fax messages per day. For purposes of this exercise, we will assume that the daily number of fax messages is normally distributed with a standard deviation of 5.0 messages.
A recent report in BusinessWeek indicated that 20 percent of all employees steal from their company each year. fewer than 5 employees steal?
the number of flawed 12.0v batteries produced at a particular manufacturer averages 4.4 per week. what is the
A seed distributor claims that 80% of its beet seeds will germinate. How many seeds must be tested for germination in order to estimate p, the true proportion that will germinate, so that the maximum error of the estimate is " = 0:03 with 90% con ..
Find the probability of getting a queen and a spade.
At the 5% significance level, can the researcher reject the hypothesis that the mean reading scores of all children in the three school systems is the same ? Formulate and test the appropriate hypotheses. Use the critical value approach.
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