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A Math test has a mean of 49 and standard deviation of 10.0. Find the corresponding z scores for:
I. a test score of 62II. a test score of 30
Please show all of your work.
Of the 880 respondents, 171 admitted that at least one light had been red. Follow the four-step process to construct a 95% confidence interval.
an investigator is interested in the posibility of merging the capabilities of television and the internet. a random
A random sample of 24 groups of adults has a mean daily lodging cost of $233 and a standard deviation of $12.50. Is there enough evidence to reject the claim at α= 0.10? Assume the population is normally distributed.
Sketch the appropriate distribution, and locate the critical region for a = 0.05.
A survey is being planned to determine the mean amount of time corporation executives watch television. A pilot survey indicated that the mean time per week is 20 hours, with a standard deviation of 5.5 hours
Suggest reasonable values for n and p (binomial) or mu (poisson) for your example. Calculate the mean and standard deviation of the distribution for your example.
Two sets, and 18% have three or more sets. If two households are chosen at random, what is the probability that at least one has a television set?
Assume that cans of Coke are filled so that the actual amounts have a mean of 12.00 oz and a stand. dev. of 0.11 oz. Find the P that a sample of 36 cans will have a mean amount of at least 12.19 oz.
Construct a 89% confidence interval estimate of the overall percentage of the B.C. population in favour of such a casino and what size of sample would be required to do this
Draw the OC curve. If the average number of defects increased by to 10 per tractor, what would the probability of detecting the shift in a control chart?
The heart rate in beats per minutes of 30 randomly selected students are given below: 78 64 69 75 80 63 70 72 72 68 77 71 74 84 70 62 67 71 69 58 74 70 80 80 63 88 60 68 69 70 71. Is it normal distribution or find the normal distribution.
What is the importance of the null hypothesis? Why has it been the backbone of mainstream hypothesis testing for decades? What are its limitations?
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