12. In order to find the minimum sample size for the estimation ofpopulation proportion, what do we take as the value of p whenwe do not have preliminary value for it?b. equal to 0.5a. less than 0.5d. equal to any desired valueC. greater than 0.513. You want to estimate the mean time Grade 11 students spendchatting with their Facebook friends each day. The estimate mustbe within one minute of the population mean. How many samplesshould you take in order to construct a 99% confidence intervalfor the population mean. Assume that the population standarddeviation is 3.5 minutes.a. at least 82b. exactly 81C. at most 82d. exactly 8214. What is the margin of error for the estimation of the populationmean u when a=0.10, s = 24.5, n 25, and x = 50.3?a, about 8.33 minutesb. about 8.35 minutesC. about 8. 37 minutesd. about 8.39 minutes15. What is the critical valuet for the confidence level 1-a 0.99and n = 27?a. 2.052b. 2.056c. 2.771d. 2.77916. You wish to estimate, with 95% confidence, the proportion ofsenior high students in your school who read the first book ofHarry Potter. Your estimate must be accurate within 2% of tihepopulation proportion. With no preliminary estimate available.what is the minimum sample size that you need?a. at least 2,301b.at least 2,401c. at least 2,506d. at least 2,605208

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12. In order to find the minimum sample size for the estimátion of population proportion, what do we take as the value of p when we do not have preliminary value for it? a. less than 0.5 b. equal to 0.5 areater than 0.5 d. equal to any desired value

12. In order to find the minimum sample size for the estimátion of population proportion, what do we take as the value of p when we do not have preliminary value for it? a. less than 0.5 b. equal to 0.5 areater than 0.5 d. equal to any desired value

MATLAB: An Introduction with Applications

6th Edition

ISBN:9781119256830

Author:Amos Gilat

Publisher:Amos Gilat

Chapter1: Starting With Matlab

Section: Chapter Questions

Problem 1P

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40. For a two-tailed test, the p-value is: A) the area under the curve between the mean and the observed value of the sample statistic B) twice the area under the curve between the mean and the observed value of the sample statistic C) the area in the tail under the curve on the side which the sample statistic lies D) twice the area in the tail under the curve on the side which the sample statistic lies
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Using the traditional formula, a 95% CI for P₁ - P₂ is to be constructed based on equal sample sizes from the two populations. For what value n (= m) will the resulting interval have width at most 0.2 irrespective of the results of the sampling? (Round your answer up to the nearest whole number.) n = You may need to use the appropriate table in the Appendix of Tables to answer this question.
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10. Claim: P₁ = P₂; α = 0.05. Sample statistics: x1 = 265, n₁ - X2 204, 2 - 301, 247 'D
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Answer the following correctly.
For a population with a mean equal to 200 and a standard deviation equal to 30, calculate the standard error of the mean for the following sample sizes. a) 20 b) 40 c) 60 a) The standard error of the mean for a sample size of 20 is (Round to two decimal places as needed.) b) The standard error of the mean for a sample size of 40 is (Round to two decimal places as needed.) c) The standard error of the mean for a sample size of 60 is
The pulse rates of 153 randomly selected adult males vary from a low of 35 bpm to a high of 99 bpm. Find the minimum sample size required to estimate the mean pulse rate of adult males. Assume that we want 95% confidence that the sample mean is within 3 bpm of the population mean. Complete parts (a) through (c) below. a. Find the sample size using the range rule of thumb to estimate ơ. n = (Round up to the nearest whole number as needed.) b. Assume that o = 12.3 bpm, based on the value s = 12.3 bpm from the sample of 153 male pulse rates. n = (Round up to the nearest whole number as needed.) c. Compare the results from parts (a) and (b). Which result is likely to be better? The result from part (a) is the result from part (b). The result from is likely to be better because Enter your answer in each of the answer boxes. ? MacBook 乡 DII DD F12 000 000 80 F9 F10 F11 F6 F7 F8 esc F3 F4 F5 F1 F2 & ( ) ! @ # 2$ 2 3 4 5 7 8 9 1 { P W E R Y U [ + II
(Round up to the nearest whole number as needed.)
47
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