It is the process used to calculate population parameters by analyzing only a small random sample from thepopulation.O a. EstimatorO b. SamplingO c. Confidence IntervalO d. EstimationIt gives a range of values within which the parameter value possibly falls.O a. Confidence IntervalO b. Range EstimationO c. Interval SamplingO d. Point Estimate

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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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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 353 with 148 successes at a confidence level of 98%.M.E. = ______%
Assume that population proportion is to be estimated from the sample described. Use the sample results to approximate the margin of error and 95% confidence interval. sample size 535 sample proportion 0.2
Determine the point estimate of the population mean and margin of error for the confidence interval. Lower bound is 1919, upper bound is 2525.The point estimate of the population mean is nothing.Enter your answer in the answer box and then click Check Answer.1
In point estimation, data from the _____. a. sample are used to estimate the sample statistic b. population are used to estimate the population parameter c. sample are used to estimate the population parameter d. None of these answers are correct.
Find the sample size needed to estimate the percentage of adults who can wiggle their ears. Use a margin of error of 3 percentage points and use a confidence level of 95%. Complete parts (a) and (b) below. a. Assume that p and q are unknown. n= (Round up to the nearest integer.) b. Assume that 25% of adults can wiggle their ears. n= (Round up to the nearest integer.) C
O Point Use the given data to find the minimum sample size required to estimate a population proportion or percentage. Margin of error: 0.05; confidence level 90%; p and q unknown n = (Round up to the nearest integer.)
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Find the sample size needed to estimate the percentage of adults who can wiggle their ears. Use a margin of error of 3 percentage points and use a confidence level of 90%. Complete parts (a) and (b) below. a. Assume that p and q are unknown. n= (Round up to the nearest integer.)
Aspirin III: Decision and Conclusion Regarding the experiment in the data frame Aspirin from the abd package, the researchers wanted to know whether or not taking aspirin affects one's risk of developing cancer. Recall that they defined their parameters as follows: p1 = the proportion of ALL individuals who would develop cancer, if all of them were to take aspirin like the subjects in the Aspirin group did. p2 = the proportion of ALL individuals who would develop cancer, if all of them were to take a placebo, like the subjects in the placebo group did. They ran the code for a two-sided significance test and got the following results: ## ## ## Inferential Procedures for the Difference of Two Proportions p1-p2:## cancer grouped by treatment ## ## ## Descriptive Results:## ## yes n estimated.prop## Aspirin 1438 19934 0.07214## Placebo 1427 19942 0.07156## ## ## Inferential Results:## ## Estimate of p1-p2: 0.0005805 ## SE(p1.hat - p2.hat): 0.002586 ## ##…
Find the sample size needed to estimate the percentage of adults who can wiggle their ears. Use a margin of error of 5 percentage points and use a confidence level of 90%. Complete parts (a) and (b) below. a. Assume that p and q are unknown. n = (Round up to the nearest integer.)
In a study of government financial aid for college students, it becomes necessary to estimate the percentage of full-time college students who earn a bachelor's degree in four years or less. Find the sample size needed to estimate that percentage. Use a 0.04 margin of error and use a confidence level of 90%. Complete parts (a) through (c) below. a. Assume that nothing is known about the percentage to be estimated. C n: (Round up to the nearest integer.) b. Assume prior studies have shown that about 40% of full-time students earn bachelor's degrees in four years or less. (Round up to the nearest integer.) c. Does the added knowledge in part (b) have much of an effect on the sample size? O A. No, using the additional survey information from part (b) only slightly reduces the sample size. O B. Yes, using the additional survey information from part (b) dramatically reduces the sample size. O C. Yes, using the additional survey information from part (b) only slightly increases the sample…
You run a regression analysis on a bivariate set of data (n=66n=66). You obtain the regression equation y=−0.208x+24.034 with a correlation coefficient of r=−0.93 (which is significant at α=0.01). You want to predict what value (on average) for the explanatory variable will give you a value of 40 on the response variable.What is the predicted explanatory value?x = _________(Report answer accurate to one decimal place.)

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