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The survival rate during a risky operation for patients with no other rate of survival is 76%. What is the probability that exactly four of the next five patients survive this operations? give answer correct to three decimal places.
Find the mean and standard deviation for the number of times this letter will be found on a typical page of 2900 characters.
What sample size must you take to be 96% confident that the results will be within $.75 of the true mean cost per call?
Independent random samples taken at two companies provide the following information regarding the anual salaries of the employees.
A number of tubes of toothpaste purchased by a typical family is a random variable having a Poisson distribution with an average of 1,8 tubes per month
at a small college the probability that a student takes physics and sociology is 0.092. the probability that a student
She gathers a sample of 35 subjects with depression and obtains a sample mean of 7.82 micrograms/100 ml. What are the null and alternative hypotheses for this study?
Find the probability of getting all girls. Find the probability of getting at least one child of each sex. Find the probability of getting exactly two children of each sex.
1.an srs of 20 third grade children is selected in chicago and each is given a test to measure their reading ability.
Suppose we want to test the hypothesis. State hypothesis Ho and the alternative hypothesis H1 that we would use for this test.
Determine the p-value; and at 93.7% confidence, test the above hypotheses.
Obtain a test statistic and p-value assuming equal variances. Interpret these results.
The probability of each. If the answer cannot be calculated, enter zero (0) as your answer. Round to 4 decimal places otherwise. YES, you need, therefore, to look at the 5th decimal place.
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