A researcher wishes to estimate the proportion of adults who have​ high-speed Internet access. What size sample should be obtained if she wishes the estimate to be within 0.04 with 95​% confidence if ​(a) she uses a previous estimate of 0.58​? ​(b) she does not use any prior​ estimates?   CRITICAL VALUE = 1.96 per table  Click the icon to view the table of critical values. ​(a) n=     ​(Round up to the nearest​ integer.)   (b)  n= ​(Round up to the nearest​ integer.)

A researcher wishes to estimate the proportion of adults who have high-speed Internet access. What size sample should be obtained if she wishes the estimate to be within 0.04 with 90% confidence if (a) she uses a previous estimate of 0.32? (b) she does not use any prior estimates? Click the icon to view the table of critical values. (a) n=(Round up to the nearest integer.) (b) n= (Round up to the nearest integer.)

A researcher wishes to estimate the proportion of adults who have high-speed Internet access. What size sample should be obtained if she wishes the estimate to be within 0.03 with 90% confidence if (a) she uses a previous estimate of 0.52? (b) she does not use any prior estimates? Click the icon to view the table of critical values. Table of critical values (a) n= (Round up to the nearest integer.) (b) n = (Round up to the nearest integer.) Critical Value, Zę Level of Confidence, (1 - a)· 100% Area in Each Tail, 90% 0.05 1.645 95% 0.025 1.96 99% 0,005 2.575 Print Done

* 00 1C A researcher wishes to estimate the proportion of adults who have high-speed Internet access. What size sample should be obtained if she wishes the estimate to be within 0.05 with 95% confidence if (a) she uses a previous estimate of 0.52? (b) she does not use any prior estimates? Click the icon to view the table of critical values. ..... (a) n= 384 (Round up to the nearest integer.) (b) n = 384 (Round up to the nearest integer.) Next DEC MacBook Air 114 F8 08 F1 F2 F3 F5 F7 & $4 2 3. R A B ion puewwo

A researcher wishes to estimate the proportion of adults who have high-speed Internet access. What size sample should be obtained if she wishes the estimate to be within 0.02 with 99% confidence if (a) she uses a previous estimate of 0.46? (b) she does not use any prior estimates? Click the icon to view the table of critical values. (a) n = (b) n = (Round up to the nearest integer.) (Round up to the nearest integer.) BE

You may need to use the appropriate appendix table or technology to answer this question. Of 290 female registered voters surveyed, 119 indicated they were planning to vote for the incumbent president. Of 425 male registered voters, 157 indicated they were planning to vote for the incumbent president. (a) Compute the test statistic. (Use female male. Round your answer to three decimal places.) (b) At a = 0.01, test to see if there is a significant difference between the population proportions of females and males who plan to vote for the incumbent president. (Use the p-value approach.) Calculate the p-value. (Round your answer to three decimal places.) p-value = What is your conclusion? O Do not reject Ho. We can conclude that there is a significant difference between the two poplation proportions. O Do not reject Ho. We cannot conclude that there is a significant difference between the two population proportions. O Reject Ho. We cannot conclude that there is a significant difference…

On average, a sample of n = 36 scores will provide a better estimate of the population mean than a sample of n = 49 scores from the same population.

You want to obtain a sample to estimate a population proportion. At this point in time, you have no reasonable estimate for the population proportion. You would like to be 98% confident that you esimate is within 4% of the true population proportion. How large of a sample size is required?n = Do not round mid-calculation. However, use a critical value accurate to three decimal places.