Comparing standard deviations

Assignment Help Basic Statistics
Reference no: EM13113556

A real estate agent wants to compare the variation in the selling price of homes on the oceanfront with those 3 blocks away A sample of 21 oceanfront homes sold within the last year revealed the standard deviation of the selling prices was 45,600. A sample of 18 homes also sold within the last year, that were one to three blocks from the ocean revealed that the standard deviation was 21,330. At the .01 significance level, can we conclude that there is more variation in the selling prices of the oceanfront homes?

Reference no: EM13113556

Questions Cloud

Question on statistics-null hypothesis : Ford Taurus travels 21 mi. while consuming exactly 1 gallon of gas. You developed a modification to the engine you believe increases the distance. If you want to justify your claim of increased mileage by using a hypothesis test
What is the smallest sample size : What is the smallest sample size needed to estimate the mean amount reimbursed to within 50 cents with 90% confidence, if a preliminary study indicates that the sample standard deviation of all amounts reimbursed is $3.00
What assumptions are necessary for the derivation : For a gas sample of N molecules that consists of N1 molecules of mass m1 and N2 molecules of mass m2, follow through a derivation which led to the result PV=1/3mv2 and PV = nRT.
Find critical value to set up decision rule to test claim : If the level of significance is 0.05, what is critical value to set up the decision rule to test the claim that the liberal arts students perform better than engineering students on average?
Comparing standard deviations : A real estate agent wants to compare the variation in the selling price of homes on the oceanfront with those 3 blocks away A sample of 21 oceanfront homes sold within the last year revealed the standard deviation of the selling prices was 45,600.
Description of testing hypotheses on data set : A compute manufacturer is about to unveil a new,faster PC.The new PC is faster but intial tests incidcate there is more variation in the processing time.
How to conclude tha stocks have a different variation : Mr. Smith had 11 stocks that averaged 11.3 percent with a standard deviation of 3.2 percent. At the .02 level of significance, can we conclude that Mr. Jones' stocks have a different variation?
Correlation between office space per worker and rental rate : For the sample of 32 lg us cities the correlation between the mean # of sq ft per office worker and the mean monthly rental rate in the central business district is the -.363 at the .05 significance level
What is the new gas pressure : A 12.0g sample of a gas has a volume of 5.25L at 29 degrees celcius and 764mmhg . If 2.7g of the same gas is added to this constant 5.25L volume and the temperature raised to 67 degrees celcius.

Reviews

Write a Review

Basic Statistics Questions & Answers

  What conclusion can be drawn based on level of confidence

If university officials say that at least 70% of the voting student population supporting the fee increase, what conclusion can be drawn based on a 95% level of confidence?

  Collectively exhaustive event

If two events are collectively exhaustive, what is the probability that both occur at the same time?

  What is the sampling distribution model

what is the sampling distribution model of the percent passing developmental courses for your campus in Fall 2009 and provide the percentages between which we would expect to see 68% of the sampling distribution, 95% of the sampling distribution

  Significant change in the population mean

Testing for Population mean - determine if there has been a significant change in the population mean.

  Standard deviation and standard error for each group

Compute the mean, standard deviation, median, and standard error for each group.

  Standard deviation for the problem of presidential election

In the 1992 U.S. presidential election, Bill Clinton received 43% of the vote compared to 38% for George H. W. Bush and 19% for Ross Perot. Suppose we had taken a random sample of 100 voters in an exit poll and asked them for whom they had voted.

  Average scores on golf course

A sample of 84 golfers showed that their average score on a particular golf course was 89.05 with a standard deviation of 3.47.

  Confidence interval for difference between two means

What is the 95% confidence interval estimate for the difference between the mean reflectivity reading for Paint A and Paint B? Please complete the blank: "we can be 95% confident that the true difference between the actual means is?

  Question-chi square test for independence

A recent study by a large retailer designed to determine whether there was a relationship between the importance a store manager placed on advertising and the size of the store revealed the following sample information:

  Statistical null and alternative hypotheses

Clearly identify the independent and dependent variables you would study. Determine whether an independent-samples or related-samples t test is most appropriate and why. Generate the statistical null and alternative hypotheses.

  Simplex method for maximum profits

The Roller Products Company produces roller skates and skateboards. It has three production lines. Production line 1 makes skateboard platforms.

  Estimate the proportion of students who consume coffee

How many students would be required to estimate the proportion of students who consume coffee? Suppose we want the estimate to be within 5% of the true proportion with 95% confidence.

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