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Find the minimum sample size when we want to construct a 90% confidence interval on the...
Candidate A is facing two opposing candidates in a mayoral election. In a recent poll of 300 residents, 98 supported candidate B and 58 supported candidate C. Construct a 95% confidence interval on the population proportion for the support of candidate A in the following election. [0.4781, 0.4819] [0.3942, 0.5658] [0.4235, 0.5365] [0.4057, 0.5543]
8. (9 pts) Suppose that we want to construct a 95% confidence interval to estimate the percentage of voters who would vote a candidate. We suggest that approximately 46% would vote for the candidate. Suppose that we want the margin of error for the confidence interval is no more than 1%. Determine how large the sample size should be.
Assume that we want to construct a confidence interval. Assume that we want to construct a confidence interval. Do one of the following, as appropriate: (a) find the critical value ta/2, (b) find the critical value za/2, or (c) state that neither the normal distribution nor the t distribution applies Here are summary statistics for randomly selected weights of newborn girls: n hg. The confidence level is 95%. 269, x 32.9 hg, s 6.2 Select the correct choice below and,...
Determine the sample size n needed to construct a 90% confidence interval to estimate the population proportion when p = 0.65 and the margin of error equals 7%. n= (Round up to the nearest integer.)
We want to construct a 95% confidence interval for the true proportion of all adult males who have spent time in prison, with a margin of error of 0.02. From previous studies, we believe the proportion to be somewhere around 0.07. The required sample size is, therefore: Select one: a. 620 b. 626 c. 632 d. 670
3 Construct a 90% confidence interval for the following random sample of Lucas Barrett's golf scores for a particular golf course he played so that he can figure out his true (population) aver 95 92 95 99 92 84 95 94 95 86 (hint: Use T-distribution table. Formula Interval estimate of a population mean when stan age score for the dared deviation is unknown) 4 The auto industry relies heavily on 0% financing to entice customers to purchase cars. In...
Using the sample of size 200, construct a 95% confidence interval for the proportion of Youth Survey participants who would describe themselves as being about the right weight (Round to three decimal places.) Sample Proportion = Margin of error Lower limit Upper limit Does your 95% confidence interval based on the sample of size 200 include the true proportion of Youth Survey participants who would describe themselves as being about the right weight? O Yes O No
to Help Assume that we want to construct a confidence interval as approa) find the crav ind her e that the normalno then ples The conceive 30% Select the correct choice below and, if necessary in OAL (Round to two decimal places as needed.) O G Round to two decimal places as needed Nether the normal distribution or the distribution
Assume that we want to construct a confidence interval. Do one of the following, as appropriate: (a) find the critical value tα/2. (b) find the critical value Zα/2, or (C) state that neither the normal distribution nor the distribution applies. The confidence level is 95%, o is not known, and the histogram of 56 player salaries in thousands of dollars) of football players on a team is as shown. Select the correct choice below and, if necessary, fill in the answer box...
1. Express the confidence interval 86.5%±4.6% in interval form 2. Assume that a sample is used to estimate a population proportion p. Find the margin of error M.E. that corresponds to a sample of size 217 with 23% successes at a confidence level of 80%. M.E. = % 3.A political candidate has asked you to conduct a poll to determine what percentage of people support her. If the candidate only wants a 6% margin of error at a 99% confidence...