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The following data represent the afternoon high temperatures for 50 construction days during a year in St. Louis,
42 70 64 47 66 69 73 38 48 2555 85 10 24 45 31 62 47 63 8416 40 81 15 35 17 40 36 44 1738 79 35 36 23 64 75 53 31 6031 38 52 16 81 12 61 43 30 33
Identify the variable being measured and describe the sample as it relates to the population.
Illustrate what can we say about the probability distribution. Is it approximately normal, elucidate the mean and standard deviation.
Evaluate the significance of the hypothesis that the randomized algorithm has a lower average runtime than the known comparison algorithm. As before, explain and list your calculations, test choices, and conclusion drawn.
The consequences of the central limit theorem is that if we end up averaging the measurements of a particular quantity, the distribution of an average tends on going toward a normal one?
What is the point estimate of the proportion of the population of employees who strongly dislike their current work experience (to 2 decimals)?
Public transportation and the automobile are two methods an employee can use to get to work each day. Samples of times recorded for each method are shown. Times are in minutes.
Select the level of significance, and determine critical, ZCR value.
How large a sample should be selected in order to estimate the population proportion to within a margin of error of 0.02 with 97% confidence. The sample proportion from the preliminary sample was 0.18.
You are the sales manager of a life insurance agency. All of your sales representatives are successful in selling a policy on 30% of their sales calls. Determine the probability of a sales representative's selling at least four policies if he (she..
Pilot sample of n = 50 tires illustrated sample standard deviation equal to 4,000 miles. Based on this information, required sample size is?
The ideal number of children. "What do you think is the ideal number of children for a family to have?" A Gallup Poll asked this question of 1016 arbitrarily chosen adults. Almost half (49%) thought two children was idea suppose that p = 0.49 is e..
For the following scores, find the (A) mean, (B) median, (C) sum of squared deviation (d) variance, and (e) standard deviation:
As part of a safety check, the Keystone Cops randomly stopped 65 ambulances and checked their tire pressure. The sample mean was 32 lbs/sq. in. with a sample standard deviation of 2 lbs/sq. in. Find the 98% confidence interval for the population m..
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