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A light bulb manufacturer guarantees that the mean life of a certain type of light bulb is at least 750 hours. A random sample of 25 light bulbs has a mean life of 745 hours. Assume the population is normally distributed and the population standard deviation is 60 hours. At α = 0.02, do you have enough evidence to reject the manufacturer's claim?
a. Identify the claim and state H0 and Ha.
b. Find the standardized test statistic z or t OR find the corresponding P-value.
c. Identify the type of test. Compare the p-value with α OR the standardized test statistic with the critical value of z or t
The Stanford Five-City Project is a comprehensive community health education study of five moderately sized Northern California towns.
What is the difference between the standard deviation for Continuous data and the standard deviation for Discrete data?
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For X set size k = 4, Y set size q = 3, c = 4 cycles for the X sample and d = 3 cycles for the Y sample, how many distinct possible permutations of the judgment ordered X and Y observations must be considered in order to compile the null distribut..
Test the hypothesis that smoking and lung cancer are independent. Use the 1 percent level of significance.
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Form all possible samples of size 3 and find the mean of each 3) make a probability distribution of the sample means and find the means
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