The cost of health care is the subject of many

Assignment Help Basic Statistics
Reference no: EM13240539

Problem # 1: 

Clothing for Runners: Your company sells exercise clothing and equipment on the internet. To design the clothing, you collect a data on the physical characteristics of you different types of customers. Here are the weights in (in kilograms) for a sample of 24 male runners. Assume that the runners can be viewed as a random sample of your potential male customers. Suppose also that the standard deviation is known to be "σ = 4.5 kg." 

68.7 61.8 63.2 53.1 62.3 59.7 55.4 58.9 60.9 69.2 63.7 67.8

65.6 65.5 56.0 57.8 66.0 62.9 53.6 65.0 55.8 60.4 69.3 62.1

Give a 95% confidence interval for ?, the mean of the population from which the sample is drawn. It is x bar +/ margin of error = 61.79 +/- ______

Problem #2:

The cost of health care is the subject of many studies that use statistical methods. One such study estimated that the average length of service for home health care among people over the age of 65 who use this type of service is 96.0 days with a standard error of 5.1 days. Assuming a very large sample, what is the 90% confidence interval for the mean length of service for all user of home health care. It is 96.0 +/- _____ 

Problem # 3: 

Executive Learn Spanish: the table below gives the pretest and posttest scores on the MLA listening test in Spanish for 20 executives who received intensive training in Spanish.

Subject Pretest Posttest Subject Pretest Posttest

1 30 29 11 30 32

2 28 30 12 29 28

3 31 32 13 31 34

4 26 30 14 29 32

5 20 16 15 34 32

6 30 25 16 20 27

7 34 31 17 26 28

8 15 18 18 25 29

9 28 33 19 31 32

10 20 25 20 29 32

ADITIONAL INFORMATION : 

The summary statistics for the difference is

Mean 1.45

Standard Error 0.716259

Median 2

Mode 3

Standard Deviation 3.203206

Sample Variance 10.26053

Kurtosis -0.38739

Skewness -0.49821

Range 12

Minimum -5

Maximum 7

Sum 29

Count 20

Confidence Level(90.0%) 1.238506

Give a 90% confidence interval for the mean increase in listening score due to the intensive training. It is 1.45 +/- _____

Reference no: EM13240539

Questions Cloud

Crisis of authorities in the 16th-17th centuries : The "crisis of authorities" (or authority) in the 16th-17th centuries occured in various historical developments. What were they and why was the "crisis" important in each case?
Do you have statistical evidence that the new light differs : There are two ways to run the experiment. The first is to obtain a random sample of 12 drivers, divide them into two groups at random and assign one group to the standard light and the second group to the new light. Suppose the table below represents..
What was the late medieval road to salvation : What was the "Late Medieval Road to Salvation" (per lecture and Moodle) and why was it important not only to persons concerned about religion, like Luther before 1517 and the Bishops of the Council of Trent, but also to civil authorities?
Determine henkels corporate beta : Determine Henkel's corporate beta, relever the average industry beta using Henkel's year-end debt-to-equity ratio. Repeat this process for each of Henkel's divisions.
The cost of health care is the subject of many : Clothing for Runners: Your company sells exercise clothing and equipment on the internet. To design the clothing, you collect a data on the physical characteristics of you different types of customers
The shiite muslims and the sunni muslims each believe that : The Shiite Muslims and the Sunni Muslims each believe that
Find the 95% confidence interval for the true mean length : A meteorologist wishes to estimate the mean amount of snowfall per year in Spokane, Washington. A random sample of the recorded snowfalls for 20 years from a 140 year period produces a sample mean equal to 54.03 inches, with a standard deviation of 9..
Boethius consider the highest form of music : Which of the following did Boethius consider the highest form of music?
Critical analysis how use of ethics by the parties involved : Critique the Ethics of those involved in the News of the World phone hacking scandal. Demonstrate in your critical analysis how the use of Ethics by the parties involved could have assisted in better operation of News Ltd.

Reviews

Write a Review

 

Basic Statistics Questions & Answers

  Find overall mean and standard deviation of test scores

What is overall mean and standard deviation of the test scores? Sketch the distribution and show where you are and where your friend is?

  Effectiveness of treating respiratory infections

The effectiveness of treating respiratory infections with herbal remedies was studied. "Days of fever" was used to measure effects. Among 356 children treated with herbal remedies, teh mean number of days with was 0.36,

  Determining the right-tail p-value

The firm examined 35 randomly chosen fax transmissions during the next year, yielding a sample mean of 14.44 with a standard deviation of 4.45 pages. (a) At the .01 level of significance, is the true mean greater than 10? (b) Use Excel to find the..

  Confused bricklayer robot problem

The Confused Bricklayer Robot Problem - Draw a picture to illustrate the initial problem situation and how can you describe a possible solution?

  What is the probability that a student selected at random

Develop a probability tree showing all marginal, conditional, and joint probabilities and what is the probability that a student selected at random failed the test?

  Question on multiple regression statistics

Estimated sales resulting from a $15,000 investment in inventory and an advertising budget of $10,000. Interpret b1 and b2 in this estimated regression equation.

  Probability of an untrained dog performing

Find the probability of an untrained dog performing as well as Maggie. Is it unusual for an untrained dog to do as well as Maggie?

  Frequency distribution and sampling

An education expert is researching teaching methods and wishes to interview teachers from a particular school district. She randomly selects ten schools from the district and interviews all of the teachers at the selected schools.

  Explanation of scatter diagram

Bivariate data for the quantitative variables x and y are given in the attached. These data are plotted in a scatter plot. Sketch an approximation of at the least-squares regression line for the data.

  Create confidence interval for difference in mean hdl levels

Generate a 95% confidence interval for the difference in mean HDL levels between men when exercise regularly and those who do not.

  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:

  Does data show a difference in the taste ratings

If the ingredient was present a code of "1" was used and a "0" otherwise. At the .05 significance level, does this data show a difference in the taste ratings?

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