Academic approach to confidence interval for mean

Assignment Help Basic Statistics
Reference no: EM13104690

A U.S. Travel Data Center survey reported that Americans stayed an average of 7.5 nights when they went on vacation. The sample size was 1500. Find a point estimate of the population mean. Find the 95% confidence interval of the true mean. Assume the population standard deviation was 0.8.

Reference no: EM13104690

Questions Cloud

Variation in the car rental rates : A researcher hypothesized that the variation in the car rental rates (in US$/day) at a major city airport is less than in the car rental rates down town.
Estimate the total holding cost : The annual demand for a product has been projected at 2,000 units. This demand is assumed to be constant throughout the year. The ordering cost is $20 per order, and the holding cost is 20 percent of the purchase cost.
Effective arguments and counterargument to support thesis : Where did you place the most effective arguments in the paper? Describe your reasoning. How did you explain counterarguments without weakening your own premise?
Describe the characteristics of firm with long cash cycle : What are some of the characteristics of a firm with a long cash cycle? Saunders Corp. has a book net worthof $13,205. Long-term debt is $8,200. Net working capital , other than cash, is $4,205. Fixed assets are$17,380.
Academic approach to confidence interval for mean : Find a point estimate of the population mean. Find the 95% confidence interval of the true mean. Assume the population standard deviation was 0.8.
Compare best plans in jc company and tucson park : Compare the best plans in the JC Company and the Tucson Parks and Recreation Department. What do they have in common?
Confidence interval application : The US Census Bureau announce that the median sales price of new houses sold in April 2009 was $221,600 while the mean sales price was $274,300. Assume that the standard deviation of the prices is $90,000.
How much time would it take : A person walks up a stalled 14 m long escalator in 81 s. When standing on the same escalator, now moving, the person is up in 48 s. How much time would it take that person to walk up the moving escalator?
Making confidence interval for population proportion : Construct a confidence interval for the population proportion p, given n = 182, x = 135; 95%. Suppose the random variable X has a normal distribution with mean 9.0 and variance 49. The probability that X takes on a value of at least 18 is approxim..

Reviews

Write a Review

Basic Statistics Questions & Answers

  Advertising expenditures-coffee time price index

Laura wanted to build a multiple regression model based on advertising expenditures and Coffee Time's price index. Based on the selection of all normal values, she obtained the following:

  Poisson distribution-confidence interval-probability

If you buy a box of Wisk, the probability of getting a scoop is 97%. If you buy 9 boxes over the next several months, what is the probability of missing two scoops?

  Nation mathematics assessment test

A random sample of 77 eighth grade students' scores on a nation mathematics assessment test has a mean score of 278 with a standard deviation of 31.

  Detyermine the standard error of estimation

Assume that a random variable, x, is distributed according to a normal distribution with mean 46 and standard deviation 12. (a) What is the standard error of the estimate, x-bar, if a sample of size 25 is taken?

  Negative relationship between independent-dependent variable

Test to determine if there is a significant negative relationship between the independent and dependent variable at a = .05 and .01

  Outliers on the dependent variables

Did you find any outliers on the dependent variables that were due to errors of coding? If so, what and why? How would you correct an error of coding?

  Chi-square test for independence of attributes

Chi-square test for independence of attributes - Describe why a x 2  test of the resulting contingency table is appropriate for such an investigation.

  Standardized test is randomly selected for probability

A student with a 3.5 to 4 grade point average who took standardized test is randomly selected. Determine the probability that students test score is less than 36.

  Equations of square trend

Determine the least squares equation. According to this information, what are the estimated sales for 2005? Listed below is the net sales in $ million for Home Depot, Inc. and its subsidiaries from 1993 to 2002.

  Binomial probability density function

Identify each variable in the formula for the binomial probability density function. Also, explain what the fraction: n! / (n-x)!x! calculates.

  Anova procedure for data

An ANOVA procedure is used for data that was obtained from four sample groups each comprised of five observations. The degrees of freedom for the critical value of F are:

  Determining mean of probability distribution

Determine the mean and standard deviation of following probability distribution.

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