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Determine the sample size necessary to estimate u for the following information. a. o = 36 and E = 5 at 95% confidence b. o = 4.13 and E = 1 at 99% confidence c. Values range from 80 to 500, error is to be within 10, and the confidence level is 90% d. Values range from 50 to 108, error is to be within 3, and the confidence level is 88%
The accompanying data on number of minutes used for cell phone calls in 1 month was generated to be consistent with summary statistics published
Write a 700- to 1,050-word executive memo that explains the required reporting for defined contribution, defined benefit, and other postretirement plans. Also include an explanation of what must happen for the two segments to be eliminated.
the times for the mile run of a large group of male college students are approximately normal with mean 7.11 minutes
Suppose that the a certain brand of light bulbs has a mean life of 600 hours and a standard deviation of 53 hours. Using this information, what percentage of light bulbs will last between 547 and 706 hours.
a. Describe the sampling distribution of the sample mean X of the average of these 40 AP.
Compute z-scores for both exams. Which class did she receive a better grade in? [Must show your work to get credit; Hint: See page 75 in your textbook]
The test statistics in a right tailed test is z= 2.50. Also use a .05 significance level and state the conclusion about the null hypothesis (reject null hypothesis or fail to reject the null hypothsis)
The last sample showed a mean and standard deviation of 3.55 and 0.08 inches, respectively. Using α = 0.05, the appropriate decision is?
Translate the following arguments into symbolic form.- It is not the case that strict controls exist on either the manufacture or the sale of handguns.
The analysis of variance results obtained from software are below. The significance level is 0.05 in testing the null hypothesis.
A new type of intensive physiotherapy is developed for individuals who have undergone spinal surgery. Due to limited hospital resources it can only be given to 3 out of 10 patients. The patients are aged:
we flip a fair coin 10 times. what is the conditional probability of getting 10 heads given that the number of heads is
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