Answered: find out the confidence interval for…

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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The mean of the numbers of chocolate chips in a sample of 40 Chips Ahoy regular cookies is 23.95 and the standard deviation is 2.55. If you need to construct a 99% confidence interval estimate of the mean number of chocolate chips in all such cookies, what is the best point estimate for this problem?
The total of individual weights of garbage discarded by 17 households in one week is normally distributed with a mean of 32.9 lbs with a sample standard deviation of 9.7 lbs. Find the 99% confidence interval of the mean.
A researcher wants to estimate the mean blood cholesterol level of young men ages 15-25 with a 94.35% confidence interval. The blood cholesterol level of young men follows a Normal distribution with standard deviation σσ = 50 mg/dl. How large a sample would the researcher need to take to estimate the mean blood cholesterol to within 15 mg/dl?
The mean age when smokers first start is 13 years old with a population standard deviation of 2 years. A researcher thinks that smoking age has significantly changed since the invention of ENDS-electronic nicotine delivery systems. A survey of smokers of this generation was done to see if the mean age has changed. The sample of 34 smokers found that their mean starting age was 12.3 years old. Do the data support the claim at the 1% significance level? What are the correct hypotheses? Ho: P V ?v years Enter an integer or decimal number [more..] H₁: p ✓? years Based on the hypotheses, find the following: Test Statistic z = (Round to 4 decimal places.) Critical Values = ± (Round to 2 decimal places.) Based on the above we choose to Select an answer that the mean age The correct summary would be: Select an answer smokers first start is different than 13. Question Help:Written Example Message instructor Submit Question 80 Aa 000 000 F4 F3 F5 F7 #3 3 E 54 $ 4 R % 5 T A 6 F6 Y & 7 U * 8 DII…
Find a 98% confidence interval for the true mean length of eyelashes, if a sample 33 eyelashes has a mean length of 13.3 millimeters, with a standard deviation of 3.6. (by hand)
A researcher wants to estimate the mean blood cholesterol level of young men ages 15-25 with a 93.66% confidence interval. The blood cholesterol level of young men follows a Normal distribution with standard deviation σσ = 35 mg/dl. How large a sample would the researcher need to take to estimate the mean blood cholesterol to within 11 mg/dl?
Suppose the population standard deviation is standard deviation "sigma"=7, an SRS of n=45 is obtained, and the confidence level is chosen to be 95%. What is the margin of error for estimating a mean "mu" ?
An experimental determination of Pb in a bullet using ICP-OES was repeated 3 times. The mean and standard deviations were 0.034% and 0.003% repectively. What is the 95%confidence interval of the mean?
The annual per capita consumption of oranges (in pounds) in the United States can be approximated by a normal distribution. The mean annual per capita consumption of oranges (in pounds) is 19.2 with a standard deviation of 4 pounds. What annual per capita consumption of oranges represents the 5th percentile? What annual per capita consumption of oranges represents the third quartile? • The time spent (in days) waiting for a heart transplant in Ohio and Michigan for patients with A+ blood can be approximated by a normal distribution with a mean waiting time of 127 days and a standard deviation of 23.5 days. What is the minimum time spent waiting for a heart that would place a patient in the top 30% of waiting times? In a certain year, the nationwide SAT verbal score averaged 430 with a standard deviatioh of 96. Assuming a normal distribution and continuous scores over the scale, between what two values would you expect to find the middle 90% of SAT verbal scores in the year noted?…
During the past year, the flight times between two cities was reported to have a population standard deviation of 20 minutes. What would the margin of error be if a sample of 64 was used for estimating the mean flight time between the two cities and with a confidence level of 95%
Suppose the mean height in inches of all 9th grade students at one high school is estimated. The population standard deviation is 3 inches. The heights of 6 randomly selected students are 71, 73, 69, 72, 71 and 64. x= Margin of error at 99%= confidence level = 99% confidence interval = [smaller value, larger value]=
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.)

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find out the confidence interval for population proportion for given data [ 4 decimal places ] population standard deviation =4 xbar = 123.5 sample size= 100 c= 0.95