# Rasmussen STA3140 final exam 2016

Jun 27th, 2016
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Question Mark 1.00 out of 1.00 Flag question Question text Find the critical value zα/2 that corresponds to a degree of confidence of 98%. Select one: a. 1.75 b. 2.33 c. 2.05 d. 2.575 Question 2 Correct Mark 1.00 out of 1.00 Flag question Question text Find the margin of error for the 95% confidence interval used to estimate the population proportion. n = 163, x = 96 Select one: a. 0.0755 b. 0.00291 c. 0.132 d. 0.0680 Question 3 Correct Mark 1.00 out of 1.00 Flag question Question text Use the given degree of confidence and sample data to construct a confidence interval for the population proportion p. n = 165, x = 138; 95 percent Select one: a. 0.779 < p < 0.892 b. 0.791 < p < 0.881 c. 0.780 < p < 0.893 d. 0.790 < p < 0.882 Question 4 Correct Mark 1.00 out of 1.00 Flag question Question text Find the minimum sample size you should use to assure that your estimate of will be within the required margin of error around the population p. Margin of err

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Rasmussen STA3140 final exam 2016Report this Question as InappropriateQuestionMark 1.00 out of 1.00Flag questionQuestion textFind the critical value z/2 that corresponds to a degree of confidence of 98%.Select one:a. 1.75b. 2.33c. 2.05d. 2.575Question 2CorrectMark 1.00 out of 1.00Flag questionQuestion textFind the margin of error for the 95% confidence interval used to estimate the populationproportion.n = 163, x = 96Select one:a. 0.0755b. 0.00291c. 0.132d. 0.0680Question 3CorrectMark 1.00 out of 1.00Flag questionQuestion textUse the given degree of confidence and sample data to construct a confidence interval for thepopulation proportion p.n = 165, x = 138; 95 percentSelect one:a. 0.779 < p < 0.892b. 0.791 < p < 0.881c. 0.780 < p < 0.893d. 0.790 < p < 0.882Question 4CorrectMark 1.00 out of 1.00Flag questionQuestion textFind the minimum sample size you should use to assure that your estimate of will be within therequired margin of error around the population p.Margin of error: 0.04; confidence level: 99%; from a prior study, estimated by 0.13Select one:a. 272b. 19c. 469d. 563Question 5IncorrectMark 0.00 out of 1.00Flag questionQuestion text459 randomly selected light bulbs were tested in a laboratory, 291 lasted more than 500 hours.Find a point estimate of the true proportion of all light bulbs that last more than 500 hours.Select one:a. 0.388b. 0.366c. 0.634d. 0.632Question 6CorrectMark 1.00 out of 1.00Fl

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