Con?dence interval for difference in two population means

Assignment Help Basic Statistics
Reference no: EM13965263

1. In a certain part of a city, the average price of homes in 2000 was $148,822, and in 2001 it was $155,908. Suppose these means were based on a random sample of 100 homes in 1997 and 150 homes in 1998 and that the sample standard deviations of sale prices were $21,000 for 2000 and $23,000 for 2001. Find a 98% con?dence interval for the difference in the two population means.

Reference no: EM13965263

Questions Cloud

Do the other four rays meet in one spot : A plane mirror is placed in front of a multiple ray projector so that the central ray is back upon itself. The other rays are adjusted so they are also reflected back on themselves. In this way, all 5 rays are parallel. A concave mirror is placed ..
Ratio of variance in spending for males and females : Assuming that the amounts spent at this supermarket by all its male and female customers were approximately normally distributed, construct a 90% con?dence interval for the ratio of variance in spending for males and females, σ2/σ2.
What is the magnification of the lens combination : An object is placed 30 cm to the left of a converging lens of focal length 15 cm, and a diverging lens of focal length 20 cm is placed 45 cm to the right of the first lens. How far from the original object is the final image? What is the magnifica..
Draw and solve the cash flow diagram for annual value : Draw and solve the Cash Flow Diagram for Annual Value "A". This is a 10 year Cash Flow, and interest rate is a compounded 7%).
Con?dence interval for difference in two population means : Suppose these means were based on a random sample of 100 homes in 1997 and 150 homes in 1998 and that the sample standard deviations of sale prices were $21,000 for 2000 and $23,000 for 2001. Find a 98% con?dence interval for the difference in the ..
Levels of well-nourished and undernourished : In order to compare the mean hemoglobin (Hb) levels of well-nourished and undernourished groups of children, random samples from each of these groups yielded the following summary.
Construct con?dence interval : What is the maximum likelihood estimator of μ1 - μ2? Construct a 99% con?dence interval for μ1 - μ2.
Difference between the population mean salaries : Construct a 90% con?dence interval for the difference between the population mean salaries. Assume that the salaries of male and female professors are both normally distributed with equal standard deviations. Interpret the result.
What is the return on your portfolio : A company has a capital structure of 40% debt and 60% equity. The YTM on the company's bonds is 9%, and the company's effective tax rate is 40%. The CFO has estimated the company's WACC to be 9.96%. What is the company's cost of equity? Show your ..

Reviews

Write a Review

Basic Statistics Questions & Answers

  Independent-dependent samples-z-test

Classify as independent or dependent samples: The average price of gasoline at ten local stations, and the average price of gasoline at ten stations in another state.

  Plot the data fit a trend line and discuss the strength of

question shown below are dollar figures for commercial and industrial loans at all commercial banks in the u.s. as

  P-value approach and determine critical value

I am to compute expected values, test stat, use p-value approach and determine critical value with alph at .05

  Sum of squares and degrees of freedom

A researcher wanted to invetigate whether there is a significant difference in the average age of instructors, assistant professors, assocated professors and full professors at a university. The faculty was selected at random and their ages were r..

  Sample correlation coefficient

The sample correlation coefficient between x and y is 0.375. It has been found out that the p-value is 0.256 when testing H0: ρ = 0 against the two-sided alternative H1: ρ ≠ 0. To test H0: ρ = 0 against the one-sided alternative H1: ρ > 0 at a sig..

  Sample data set is explained by the regression model

What percentage of the observed variation between the actual values of the dependent variable and the mean value of the dependent variable in the sample data set is explained by the regression model?

  The supplier has determined that the standard deviation of

a supplier contract calls for a key dimension of a part to be between 1.88 and 2.12 cm. that is a part will not be

  Find the expected value of the collision policy holder

The insurance company charges an annual rate of $250 for the collision coverage. What is the expected value of the collision policy holder?

  The mean is always the best measure of central tendency to

the mean is always the best measure of central tendency to use.truefalseif you use a simple random sample then your

  Solution of conditional probability

Let A be the event that a student is enrolled in an accounting course, and let S be the event that a student is enrolled in a statistics course.

  Determine probability of getting someone who doesn-t smoke

If one person is arbitarily selected from this sample, determine probability of getting someone who is age 18-22 or doesn't smoke.

  Multiple choice questions based on multiple regression1 a

multiple choice questions based on multiple regression.1. a regression model between sales y in 1000 unit price x1 in

Free Assignment Quote

Assured A++ Grade

Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!

All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd