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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
Inmates who are in the state facility and 9 who have legal satisfaction scores of 5 or more. How do determine the probability for this because I have come up weird numbers.
Find Karl Pearson's correlation coefficient between the sales and expenses from the data given below: Sales (Rs. Lakhs) 50 50 55 60 65 65 65 60 60 50 Expenses (Rs. Lakhs) 11 13 14 16 16 15 15 14 13 13?"
A distributor of pre-washed shredded lettuce is opening a new plant and considering whether to use mechanized process or manual process to prepare the product.
A dish contains 20 gumballs - 9 blue, 6 red and 5 white. We randomly select two gumballs from the dish without replacement. a) Let X be the number of blue gumballs selected. Complete the probability distribution of X by filling in the appropriate p..
two parts are assembled. the distributions of x1 and x2 are normal with micro1 20 s1 0.3 and micro2 19.6 s2 0.4.
A Geiger-Muller tube and a scaler record approximately 50 counts per second due to a radioactive source. What is the shortest counting time required so that the percentage error of the counts will not exceed 1%?
Founder of modern probability and statistics theory Cardano asserted that if one throws a die three times the chance that a given number will show at least once is 50 percent. This is now recognized as the wrong answer. Calculate, what is a probab..
Using the .10 level of significance, can we conclude that the assembly time using the new method is faster?
Compute the sample correlation coefficient r. Compute the coefficient of determination. Give a brief explanation of the meaning of the coefficient of determination in the context of this problem.
question 1 the gallop poll folks found that 27 of adults surveyed national survey said that they had been in a
A sample of 4 different calculators is randomly selected from a group containing 42 that are defective and 27 that have no defects. what is the probability that all four of the calculators selected are defective?
Calculate the profit earned/loss incurred on; a high performance tire that exceeds 40,000 miles, a high performance tire that does not exceed 40,000 miles.
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