75T: Business Data Analytics home >ervals for population proportionszyBooks:Critical values for quick reference during this activity.Confidence level Critical value0.90z* = 1.645%3D0.95z* = 1.9600.99z* = 2.576353846 1423376.gx3zqy7Jump to level 1A poll reported 43% support for a statewide election with a margin of error of1.83 percentage points.How many voters should be sampled for a 90% confidence interval? Round upto the nearest whole number.Ex: 1234 votersCheckF11pausebreakF12F4F5F6F7F8F9F10国

Answered: Critical values for quick reference…

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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You want to estimate the mean weight of quarters in circulation. A sample of 60 quarters has a mean weight of 5.682 grams and a standard deviation of 0.061 gram. Use a single value to estimate the mean weight of all quarters. Also, find the 95% confidence interval for the average weight of all quarters. The estimate for the mean weight of all quarters is (Round to three decimal places as needed.) grams. Find the 95% confidence interval for the mean weight of all quarters. grams < p< grams (Round to three decimal places as needed.)
Sample size 42, mean. 53.1, and standard deviation 8.2 An 80% confidence interval for population mean is
You want to estimate the mean weight of quarters in circulation. A sample of 40 quarters has a mean weight of 5.626 grams and a standard deviation of 0.059 gram. Use a single value to estimate the mean weight of all quarters. Also, find the 95% confidence interval for the average weight of all quarters. The estimate for the mean weight of all quarters is (Round to three decimal places as needed.) an example Get more help - grams. Clear all
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Listed below are speeds (mi/h) measured from traffic on a busy highway. This simple random sample was obtained at 3:30 P.M. on a weekday. Use the sample data to construct a 98% confidence interval estimate of the population standard deviation. 64 60 60 57 60 53 61 60 61 69 59 66 LOADING... Click the icon to view the table of Chi-Square critical values. Question content area bottom Part 1 The confidence interval estimate is 2.72.7 mi/h<σ<7.87.8 mi/h. (Round to one decimal place as needed.) Part 2 Does the confidence interval describe the standard deviation for all times during the week? Choose the correct answer below. A. Yes. The confidence interval describes the standard deviation for all times during the week. B. No. The confidence interval is an estimate of the standard deviation of the population of speeds at 3:30 on a weekday, not other times.
Find the value for each ta/2 Prompts Submitted Answers n = 18 for the 99% confidence interval for the Choose a match mean. n = 10 for the 90% confidence interval for the Choose a match mean. n = 15 for the 98% confidence interval for the Choose a match mean.
Question:
Thunderstorm Speeds A meteorologist who sampled 10 thunderstorms found that the average speed at which they traveled across a certain state was 12 miles per hour. The standard deviation of the sample was 2.2 miles per hour. Use a graphing calculator and round the answers to at least one decimal place. Part: 0 / 2 Part 1 of 2 Find the 85% confidence interval of the mean. Assume the variable is normally distributed. Part: 1/ 2 Part 2 of 2 If a meteorologist wanted to use the highest speed to predict the times it would take storms to travel across the state in order to issue figure would she likely use? what The meteorologist should use miles per hour for the prediction.
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Which distribution do you use to find critical values for confidence intervals (n = 20) for a variancewhen the population standard deviation sigma is unknown?
Construct a 90% confidence interval to estimate the population mean using the data below. What assumptions need to be made about this population? X̄=37 s=9.1 n=25 **Round to two decimal places as needed.**
Trace metals in drinking water affect the flavor and an unusually high concentration can pose a health hazard. Ten pairs of data were taken measuring zinc concentration a local water source. 0.415 0.238 0.390 0.410 0.605 0.609 0.632 0.523 0.411 0.612 Build a 90% confidence interval for the true concentration of zinc. Assume the conditions for inference are met.

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