Independent samples of size n1 = 25 and n2 = 36 are taken from two normal populations with knownstandard deviations of σ1 = 5.5 and σ2 = 4.2. e sample means are x¯1 = 13.6 and x¯2 = 19.2. Find a95% confidence interval for µ1 − µ2. Independent samples of size n₁ = 25 and n₂ = 36 are taken from two normal populations with known= 13.6 and 2 19.2. Find astandard deviations of 1 5.5 and 2 4.2. The sample means are ₁95% confidence interval for #₁ - 12.

The given values are n1=25,n2=36,x¯1=13.6,x¯1=19.2 and σ1=5.5,σ2=4.2.

Independent samples of size n₁ = 25 and n₂ = 36 are taken from two normal populations with known 4.2. The sample means are ₁ = 13.6 and 2 = 19.2. Find a standard deviations of 1 5.5 and ₂ = 95% confidence interval for 1-2.

Independent samples of size n₁ = 25 and n₂ = 36 are taken from two normal populations with known 4.2. The sample means are ₁ = 13.6 and 2 = 19.2. Find a standard deviations of 1 5.5 and ₂ = 95% confidence interval for 1-2.

MATLAB: An Introduction with Applications

6th Edition

ISBN:9781119256830

Author:Amos Gilat

Publisher:Amos Gilat

Chapter1: Starting With Matlab

Section: Chapter Questions

Problem 1P

See similar textbooks

Similar questions

Construct a 95% confidence interval for μ1 - μ2. Two samples are randomly selected from normal populations. The sample statistics are given below. Assume that σ21 = σ22.n1 = 8 n2 = 7x1 = 4.1 x2 = 5.5s1 = 0.76 s2 = 2.51
Give a 99.9% confidence interval, for μ1−μ2μ1-μ2 given the following information. n1=50n1=50, ¯x1=2.13x¯1=2.13, s1=0.98s1=0.98n2=40n2=40, ¯x2=1.65x¯2=1.65, s2=0.86s2=0.86 Rounded to 2 decimal places.
Give a 90% confidence interval, for μ1−μ2μ1-μ2 given the following information. n1=20, x¯1=2.95, s1=0.7n2=30, ¯x2=2.76 , s2=0.75 __±___ Use Technology Rounded to 2 decimal places.
A telephone poll of 841 adult Americans was reported in an issue of Time Magazine. One of the questions asked was, "What is the main problem facing the country?" Forty percent answered, "crime." Construct a 88% confidence interval for the population proportion of Americans who feel that crime is the main problem.p'=α2=zα2=Margin of Error: E=We are 88% confident that the proportion of Americans who feel that crime is the main problem is between____ and ____.
Assuming that the two populations are normally distributed with unequal and unknown population standard deviations, construct a 95% confidence interval for µ1- µ2 for the following. N1=14 X1 =109.43 s1 =2.26 N2=15 x2 =113.88 s2=5.84
Suppose a marketing company randomly surveyed 404 households and found that in 214 of them, the woman made the majority of the purchasing decisions. Construct a 90% confidence interval for the population proportion of households where the women make the majority of the purchasing decisions.p'=α2=zα2=Margin of Error: E=We are 90% confident that the proportion of households in the population where women make the majority of purchasing decisions is between___ and ___.
Two random samples are selected from two independent populations. A summary of the samples sizes, sample means, and sample standard deviations is given below: n1=51, x¯1=59.2, s1=5.5 n2=50,x¯2=71.4,s2=10.4 Find a 93% confidence interval for the difference μ1−μ2μ1−μ2 of the means, assuming equal population variances. Confidence Interval =
Two random samples are selected from two independent populations. A summary of the samples sizes, sample means, and sample standard deviations is given below: n1=41,n2=40,x¯1=59.1,x¯2=72,s1=5.4s2=10.9 Find a 92% confidence interval for the difference μ1−μ2 of the means, assuming equal population variances. Confidence Interval =
The adhesive strength of medical monitoring device has a known standard deviation of 0.55 dyne cm. Tests on the first five prototypes of a new model yielded the following values of adhesive strength: 2.96, 5.67, 2.76, 1.26 and 4.21 dyne-cm'. a. What is the 95% confidence interval for the mean adhesion? b. If the manufacturer wants the confidence interval to be no wider than 0.62 dyne-cm2, how many 1. observations should they take?
Find the a/2 ( the area in one tail outside of the confidence interval) and the critical value z a/2 necessary to construct an 80% confidence interval.