Question
Offered Price \$32.00

UST LEARNING ENHANCER PROBLEM QUESTIONS SOLUTION

Question # 00018979
Subject: Education
Due on: 09/30/2014
Posted On: 07/03/2014 01:25 PM

Rating:
4.1/5
Posted By
Questions:
4851
Tutorials:
4854
Feedback Score:

Question

We sample 20 new cars (sedans) and find the average miles per gallon (mpg) to be 26 with a standard deviation of 1.7.

1) If we increase our sample size to 40, what is the standard error of the mean?

In a sample of 100 BSC students, we find that on average students eat at a fast-food restaurant four times a week with a standard deviation of .5.

2) What is the standard error of the mean?

3) If our sample size is 1000, what is the standard error?

In a sample of 212 BSC students, we find that 82% are binge drinkers.

4) If we increase the sample size to 500, what is the standard error of the proportion?

Thirty out of 167 students have been involved in a violent conflict in in the past year.

5) If 90 students reported a violent conflict, what is the standard error of the proportions?

We sample 20 news cars (sedans) and find the average mpg to be 26 with a standard deviation of 1.7.

6) What is the 95% confidence interval (CI)

In a sample of 100 BSC students, we find that on average students eat at a fast-food restaurant four times a week with a standard deviation of .5.

7) What is the 95% CI?

8) What is the 99% CI?

In a sample of 212 BSC students, we find that 82% are binge-drinkers

9) What is the 99% CI?

EXERCISE 2

Use the cross-tabulation below to answer questions 1-3.

Homeowner or Renter of Respondent Cross-tabulation

 WHITE BLACK OTHER TOTAL Homeowner or renter Owns homePays rentOther 59024123 45574 27243 66232228 Total 852 106 54 1012

1) How many respondents own a home?

2) Of Whites, what percent own a home?

3) Which of the three groups is most likely to pay rent?

Use the table below to answer questions 4 & 5

Rap Music (3) Respondent’s Sex Cross-tabulation

 MALE FEMALE TOTAL Rap Music (3) Like itMixed feelingsDislike it Count% WithinRespondent’s sexCount% Within respondent’s sexCount% Within respondent’s sex 5615.3%6016.4%25068.3% 5511.1%10922.0%33266.9% 11112.9%16919.6%58267.5% Total Count% Within respondents sex 366100.0% 496100.0% 862100.0%

4) Of females, what percent like a rap music?

5) Are males or females more likely to like rap music?

Suppose that we want to know if males are more likely than females to live off campus. Use the data below to construct a cross-tabulation table. Be sure to include frequencies, column percent’s, and marginal values.

 SEX RESIDENCE SEX RESIDENCE MaleFemaleFemaleFemaleMaleFemaleFemaleMaleFemaleFemaleFemaleMale On-CampusOn-CampusOn-CampusOn-CampusOn-CampusOn-CampusOn-CampusOn-CampusOn-CampusOn-CampusOn-CampusOn-Campus FemaleFemaleFemaleFemaleMaleFemaleFemaleFemaleMaleFemaleFemale On CampusOn CampusOn CampusOn CampusOn CampusOn CampusOn CampusOn CampusOn CampusOn CampusOn Campus

6) What percent of respondents are male?

7) Of females, what percent live off-campus?

8) Of those who live off-campus, what percent are female?

9) Use the table below to calculate chi-square:

Voting in 1992 election

 Frequency Percent Valid Percent Cumulative percent Valid VotedDid not voteNot eligibleRefused 659211205 73.223.42.2.6 73.623.62.2.6 73.697.299.4100.0 TotalMissing DKNA 89532 99.4.3.2 100.00 TotalTotal 5900 .6100.0

10) Use the table below to calculate chi square:

Classical music (3) Education cross-tabulation

 Less Than High School High School of higher Total Classical music (3) Like itMixed FeelingsDislike it Count% Within educationCount% Within educationCount% Within education 3530.4%2320.0%5749.6% 40354.2%19626.3%14519.5% 43851.0%21925.5%20223.5% Total Count% Within education 115100.0% 744100.0% 859100.0%

For each of the problems below:

A) Draw a scatterplot.

B) Calculate Pearson’s r

C) Calculate the y-intercept, slope, and draw a regression line on the scatterplot.

D)Answer the “prediction” problem

E) Calculate r2 and explain what it tells us about the relationship between the variables

F) Calculate the t-ratio for Pearson’s r and determine the level of significance

11) A researcher wants to learn more about the relationship between the number of miles traveled to work and earnings. She hypothesizes that wealthier employees live outside the city rather than in the city and decides to sample a group of workers from a bank located downtown. She obtains the following data.

 EARNINGS IN \$ (X) MILES TRAVELED TO WORK (Y) 33,25084,50066,35058,42545,60067,24077,900 5216781410

Prediction problem: How far from the city does an employee earning 50,000 live?

12) A researcher wants to investigate the relationship between social networks and virtual social networks. She predicts that large virtual networks will be associated with large “real” networks. She develops two networking indices to measure networking that range from 0 to 50. Use the data below to access her hypothesis.

 VIRTUAL SOCIAL NETWORKING SCORE (X) “REAL SOCIAL NETWORKING SCORE (Y) 25321610482215253441 20102319372541252618

Prediction problem: What is the “real” networking score for a respondent with a virtual networking score of 30?

Tutorials for this Question
Available for
\$32.00

UST LEARNING ENHANCER PROBLEM QUESTIONS SOLUTION

Tutorial # 00018424
Posted On: 07/03/2014 01:26 PM
Posted By:
jia_andy
Questions:
4851
Tutorials:
4854
Feedback Score:
Tutorial Preview …LEARNING…
Attachments
UST_LEARNING_ENHANCER_PROBLEM_QUESTIONS_SOLUTION.docx (147.21 KB)
Preview: = xxxxxx 0930*SE x 26-2 0930*1 xxxxxxxxxx = 25 xxxxxxx limit x xxxxxx 0930*SE x 26+2 0930*1 xxxxxxxxxx = 26 xxxx a xxxxxx xx 100 xxx students, we xxxx that on xxxxxxx students xxx xx a xxxxxxxxx restaurant four xxxxx a week xxxx a xxxxxxxx xxxxxxxxx of x 7) What xx the 95% xxxxxxxx limit x xxxxxx 9842*SE x 26- 1 xxxxxx 5/sqrt(100) = xx 90Upper xxxxx x Mean+1 xxxxxxx = 26+1 xxxxxx 5/sqrt(100) = xx 108) xxxx xx the xxx CI?Lower limit x Mean- 2 xxxxxxx = xxx x 6264*0 xxxxxxxxxx = 25 xxxxxxx limit = xxxxxx 9842*SE x xxxx 6264*0 xxxxxxxxxx = 26 xxxx a sample xx 212 xxx xxxxxxxxx we xxxx that 82% xxx binge-drinkers9) What xx the xxx xxxxxxxx limit x Proportion- 2 xxxxxxx = 0 xxxx 5758*sqrt(0 xxxx xxxxxxx = x 7529Upper limit x Proportion+2 5758*SE x 0 xxxx xxxxxxxxxxx 82*0 xxxxxxx = 0 xxxxxxxxxxxx 2Use the xxxxxxxxxxxxxxxx below xx xxxxxx questions xxx Homeowner or xxxxxx of Respondent xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx or xxxxxx xxxx home xxxx rent Other59024123455742724366232228Total8521065410121) xxx many respondents xxx a xxxxxxxxxx xx Whites, xxxx percent own x home?69 253) xxxxx of xxx xxxxx groups xx most likely xx pay rent?White, xxxxxxx overall xxxxxxxxxx xx large xxxx black and xxxxx Use the xxxxx below xx xxxxxx questions x & 5Rap xxxxx (3) Respondent’s xxx Cross-tabulationMALEFEMALE xxxxxxxx xxxxx (3) xxxx it Mixed xxxxxxxx Dislike itCount% xxxxxx Respondent’s xxxxxxxxx xxxxxx respondent’s xxxxxxxxx Within respondent’s xxxxxxx 3%6016 4%25068 xxxxxx 1%10922 xxxxxxx xxxxxxx 9%16919 xxxxxxx 5%TotalCount% Within xxxxxxxxxxx sex366100 0%496100 xxxxxxxx 0%4) xx xxxxxxxx what xxxxxxx like a xxx music?11 1%5) xxx males xx xxxxxxx more xxxxxx to like xxx music?Males are xxxx likely xx xxxx rap xxxxx because the xxxxxxxxxx is higher xxxxxxx that xx xxxx to xxxx if males.....
UST_LEARNING_ENHANCER_PROBLEM_QUESTIONS_SOLUTION_WORKSHEET.xlsx (32.84 KB)
Preview: of xxxxx p-valuedfchi-squareSEXRESIDENCEMaleFemaleOn-CampusResidenceOff xxxxxx Voted Did xxx voteNot eligible xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx of xxx xxxx observed xxxxxxxxx - E(O x E)² / xx of xxxxxxxxx xxxx High xxxxxxxxxx School of.....
* - Additional Paypal / Transaction Handling Fee (3.9% of Tutorial price + \$0.30) applicable
Loading...