User Account

All Pages

Con?dence interval for the actual variance

Assignment Help Basic Statistics
Reference no: EM13963826

Air pollution in large U.S. cities is monitored to see whether it conforms to requirements set by the Environmental Protection Agency. The following data, expressed as an air pollution index, give the air quality of a city for 10 randomly selected days.

56.23 57.12 57.7 65.80 59.40
62.90 58.00 64.56 63.92 63.45

Assuming that the data may be viewed as a random sample from a normal population, construct a 99% con?dence interval for the actual variance of the air pollution index for this city and interpret.

Reference no: EM13963826

Questions Cloud

What is the extraction mass fraction : What is the extraction mass fraction, the heat rate, and the thermal efficiency? The turbine efficiency is 89%. Neglect pump work
Difference in yields for two brands of fertilizers : Use the data to determine whether there is a difference in yields for two brands of fertilizers. Use α = 0.01. State any assumptions you made to solve the problem.
Determining the average percentage of impurities : (a) Construct a 95% con?dence interval for the average percentage of impurities in this brand of peanut butter. (b) Give an approximate 95% con?dence interval for the population variance. (c) Interpret your results and test for no..
Variation in weights of contaminated ?sh : The 25 samples of ?sh in the study produced the following summary statistics: x = 1030.5 g, and the standard deviation s = 200.6 g. Construct a 95% con?dence interval for the true variation in weights of contaminated ?sh in this river.
Con?dence interval for the actual variance : Assuming that the data may be viewed as a random sample from a normal population, construct a 99% con?dence interval for the actual variance of the air pollution index for this city and interpret.
Why risk can be insured against but uncertainty cannot : Savings accounts pay very low rates of interest. The average return on the stock market is about 10-12 %, in the long run. Why would anyone put money into a savings account.
Complete the following table by calculating du, w, and q : Complete the following table by calculating DU, W, and Q (including the algebraic signs) for each of the four steps and for the whole process.
What is the minimum uncertainty in the position of photon : The kinetic energy of a nonrelativistic particle can be written in terms of its momentum as K = p ^2 /2 m . Planck's constant is 6.63 × 10^-34 J · s. What is the minimum kinetic energy of a proton confined within a nucleus having a diameter of 6 ×..
Is the proposed stead-state operation feasible : Is the proposed stead-state operation feasible - What is the corresponding length of wire that may be used in the heater for a maximum available voltage of 110V? What is the power rating of the heater?

Reviews

Write a Review

Basic Statistics Questions & Answers

  A new extended lightbulb has an average service life of

a new extended lightbulb has an average service life of 750 hours. with a standard deviation of 50 hours. if the

  Find number of gum person chews per day greater than eight

Found mean number of sticks of gum chewed per day was 9. Standard deviation of population is 1. At α = 0.05, is number of sticks of gum person chews per day actually greater than 8?

  If we select 90 students assume independence what is the

0.71 of all college students like the idea of a new curriculum. if we select 90 students assume independence what is

  Null hypothesis and alternative hypothesis

You work at a hospital that has always had about 100 emloyees staffed at night. You think that the number of employees staffed at night has recently decreased and would like to test this claim.

  When a survey calls residential telephone numbers at random

when a survey calls residential telephone numbers at random only 25 of the calls reach a live person. you watch the

  Questions related to the study demonstrated the statistics

Determine whether the method of delivering teaching influences adherence with antiretroviral therapy.

  Case-control and cross-sectional studies

The following is a case-control study: Obtaining histories and other information from a group of known cases and from a comparison group to determine the relative frequency of a characteristic or exposure under study.

  For a group of 120 people assuming that each person is

for a group of 120 people assuming that each person is equally likely to have a birthday on each of 365 days in the

  Distinguishes regression from anova

What distinguishes regression from ANOVA? What are the assumptions and limitations of each, and when should one be used in place of the other

  Assume that the significance level is a005 use the given

assume that the significance level is a0.05. use the given information to find the p-value and the critical values.with

  Interpret making a type one error and type two error

Very satisfied customers give the XYZ-Box video game system a rating that is at least 42. In the context of this situation, interpret making a Type I error; interpret making a Type II error.

  Plausible mean value using histogram applet

This set of height measurements are recorded in centimeters. Answer the following questions using the Histogram Applet. Is 1.7cm a Plausible mean value? Explain.

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!

Submit Assignment

Academics

Major Subjects

Majors

Get In Touch

whatsapp: +1-415-670-9521

Phone: +1-415-670-9521

Email: [email protected]

TERMS & POLICIES

HELP & SUPPORT

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