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In given Exercise, a small-scale preliminary survey has indicated that no more than 20% of the television households will tune in to the first episode of the miniseries. Given this information, how large must the sample be?
Exercise There are approximately 109 million television households in the United States. A ratings service would like to know, within 5 percentage points and with 95% confidence, the percentage of these households who tune in to the first episode of a network miniseries. How many television households must be included in the sample?
Over the last year the absentee rate at a large corporation averaged 8.2 days absent with a standard deviation of 6 days. One department with 40 employees had an absentee rate of 12 days per employee.
Find a 95% confidence interval for the proportion of people that prefer version 2, Just considering the people that like the product, find a 95% confidence interval for the mean of the variable "How much they would pay"
the mean weight of loads of rock is 51.0 tons with a standard deviation of 6.0 tons. if 16 loads are chosen at random
A 6 sided dice will be rolled and the die will continue to be rolled until a 3 is obtained for the third time. What is the expected number of die rolls needed?
The incubation time for Rhode Island Red chicks is normally distributed with a mean of 21 days and standard deviation of approximately 1 day.
Suppose that the incident rate of a particulat kind of accient is 1/10,000 persons. In a town of 50,000 persons, what is the probability that there is no accident of this kind?
Which is the estimated or dear proportion of defective cups in the population?
An experiment is called a clinical trial in medical research. - Why do you think the results were different with the experimental research and the nonexperimental research?
control chart for x bar is maintained on a quality characteristic which is normally distributed.the sample size is n4.
Find the critical value z that corresponds to the given confidence level of 90%.
a population has a mean of 50 and a standard deviation of 13. if a random sample of 36 is taken what is the probability
What percentage of batches is likely to be outside the specification in the long run - From the sample, does it seem that the population mean is on target?
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