Sixty eight percent of the sample
Suppose that 76% of Americans prefer Coke to Pepsi. A sample of 200 was taken. What is the probability that at least sixty eight percent of the sample prefers Coke to Pepsi?
A. 0.9960
B. 0.9925
C. 0.0075
D. 0.0040
E. Can not be determined.
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Assume that the number of customers who arrive at a water ice stan d follows the Poisson distribution with an average rate of 6.4 per 30 minutes.
Prince Edward Island Fisheries and Environment has been feeding a special food to rainbow trout fingerlings in a pond. A sample of the weights of 40 trout revealed that the mean weight is 402.7 grams and the standard deviation 8.8 grams. What is t
What is the probability that a t test will find a significant difference between means at the 0.05 level? Give results for both one- and two-tailed tests. Hint: the power of a one-tailed test at 0.05 level is the power of a two-tailed test at 0.10
According to the Coffee Research Organization the typical American coffee drinker consumes an average of 3.1 cups per day. A sample of 12 senior citizens revealed they consumed 3.4 cups per day with a standard deviation of 6.7. At the 0.05 signifi
If the pH level of the reservoir is ok, the results at each location will have varying results, with an average pH of 8.5 and a standard deviation of 0.22. If the pH level of the reservoir is ok, what is the probability that the sample average is
A random sample of 5 homes in Newberry, Florida had a mean of $169,900 and a standard deviation of $21,756. Construct a 95% confidence interval for the average home of this size in Newberry.
What is the value of the t score for a 98% confidence interval if we take a sample of size 22?
A sample of 15 recent college graduates found that starting salaries for attorneys in New York City had a mean of $102,342 and a standard deviation of $21,756. What does mu represent? The average salary of all graduates in the sample, 102,342 dolla
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