Independent random sampling from two normally distributed populations gives the results below.Find a 99% confidence interval estimate of the difference between the means of the twopopulations.n1 = 81X1= 11701 = 20n2 = 85X2= 10302 = 11The confidence interval is< (H1- H2)<(Round to four decimal places as needed)

Answered: Image /qna-images/answer/78f54df3-2fa1-4a6b-8426-fb1c3efef4d2.jpg

Answered: Independent random sampling from two…

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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Use the given confidence interval to find the margin of error and the sample mean. (7.14,10.84) The sample mean is The margin of error is ... (Type an integer or a decimal.) (Type an integer or a decimal.)
The researcher recorded the amount of time each bird spent in the plain chamber during a 60-minute session. Suppose the study produced a mean of M = 44.62 minutes on the plain chamber with SS = 206 for a sample of n = 10 birds. Construct the 99% confidence interval to estimate the mean amount of time spent on the plain side for the population of birds. Please type only the lower interval with three decimal places. For example if CI= ( 10.25, 15), then type 10.25 as your answer.
Construct a confidence interval for p, - Pp2 at the given level of confidence. X1 = 384, ng = 508, x2 = 445, n2 = 573, 90% confidence The researchers are % confident the difference between the two population proportions, p, - P2, is between and (Use ascending order. Type an integer or decimal rounded to three decimal places as needed.)
Construct a confidence interval for P1 - P2 at the given level of confidence. X1 = 26, n, = 236, x2 = 30, n2 = 304, 90% confidence %3D The researchers are% confident the difference between the two population proportions, p, - P2, is between and (Use ascending order. Type an integer or decimal rounded to three decimal places as needed.)
We want to estimate the number of pounds of ground beef produced during a month. The firm processes 25,000 cows every year in this plant, and samples 500 cows for this investigation. This sample produced i = 290 lbs ground of beef per cow with a sample standard deviation of s = 40 lbs. The plant is paid S.75/b for the beef. a) Find a 90% confidence interval for ground beef. The plant manager bragged about the productivity of his workers and gave them a bonus because he says they slaughtered 2,500 cows and made $560,000 for the plant this month. Should the board of directors investigate? Why or why not? b) Type here to search 8. 9. E R T Y D F G K L ent pause V B M alt ctri
X1=45 N1=35 S1=9 X2=47 N2=40 S2=8 Find the confidence interval of 80% ?
A sample of n = 25 diners at a local restaurant had a mean lunch bill of $16 with a standard deviation of o = $4. We obtain a 95% confidence interval as (14.43, 17.57). Which action will not reduce the margin of error? sampling from a population with less variability decreasing the sample size decreasing the confidence level increasing the number of digits for calculating the interval
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A sample of 66 night-school students' ages is obtained in order to estimate the mean age of night-school students. x = 24.7 years. The population variance is 18. (a) Give a point estimate for u. (Give your answer correct to one decimal place.) (b) Find the 95% confidence interval for u. (Give your answer correct to two decimal places.) Lower Limit Upper Limit (c) Find the 99% confidence interval for u. (Give your answer correct to two decimal places.) Lower Limit Upper Limit
n1=16 x‾1=124 s1=35 n2=12 x‾2=86 s2=31 Use this data to find the 98% confidence interval for the true difference between the population means. Assume that the population variances are not equal and that the two populations are normally distributed. Copy Data Step 2 of 3 : Find the margin of error to be used in constructing the confidence interval. Round your answer to six decimal places. Step 3 of 3 : Please also find the high and low endpoints and round to four decimal points.
In a random sample of 670 Americans, 35% indicated that they have a cat for a pet. Estimate with 96% confidence the proportion of all Americans that have cats as pets. Give the confidence interval in interval notation, (LCL,UCL) Give your answer as percentages, to at least 2 decimal places, and use at least 3 decimal places in your critical value. Confidence Interval:
Construct a confidence interval for p, - P, at the given level of confidence. X1 = 34, n1 = 273, x2 = 32, n2 = 313, 90% confidence The researchers are % confident the difference between the two population proportions, p, - P2, is between and (Use ascending order. Type an integer or decimal rounded to three decimal places as needed.)

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