Confidence interval

Brief Introduction: AJ Davis is a department store chain, which has many credit customers and want to find out more information about these customers. AJ Davis has complied a sample of 50 credit customers with data selected in the following variables: Location, Income (in $1,000’s), Size (Number of people living in the household), Years (number of years the customer has lived in the current location), and Credit Balance (customers current credit card balance on the store’s credit car, in $)

50 random samples of the same sample size are taken from a population, and a 90% confidence interval is constructed from each sample. How many of the intervals would you expect to contain the true population mean?  Answer:  Correct55 Round your answer to a whole number value as necessary.  For example, 37 would be a legitimate entry.  Answer Key: 45 Feedback: 90% of 50 is 45, so we would expect 45 of the intervals to contain the true population mean. Question 5 of 20 1.0/ 1.0 Points Accepted characters:

the ticket price from the sample of 240 punters was $1,200 with a standard deviation of $650. From EXCEL Mega Stat 99% Confidence Level 1,200 Mean TICKET PRICES 650 Standard Dev. Z=2.576 Upper confidence level = $1308.75 Lower Confidence Level= $1,091.92 Yes, the punters are paying more than $1,100 face value because it falls within the Confidence interval. However, the punters are not paying $1,500 for the tickets because it

Gulf Real Estate Properties Gulf Real Estate Properties, Inc., is a real estate firm located in southwest Florida. The company, which advertises itself as “expert in the real estate market,” monitors condominium sales by collecting data on location, list price, sale price, and number of days it takes to sell each unit. Each condominium is classified as Gulf View if it is located directly on the Gulf of Mexico or No Gulf View if it is located on the bay or a golf course, near but not on the Gulf

Question 1 of 25 | 1.0 Points | | A lawyer researched the average number of years served by 45 different justices on the Supreme Court. The average number of years served was 13.8 years with a standard deviation of 7.3 years. What is the 95% confidence interval estimate for the average number of years served by all Supreme Court justices? Place your limits, rounded to 1 decimal place, in the blanks. Place you lower limit in the first blank.  Place your upper limit in the second blank.  When entering

Managerial Report 1. Use appropriate descriptive statistics to summarize the data on assets and yields for the money market funds. 2. Develop a 95% confidence interval estimate of the mean assets, mean 7-day yield, and mean 30-day yield for the population of money market funds. Provide a managerial interpretation of each interval estimate 3. Discuss the implication of your findings in terms of how Lisa could use this type of information in preparing her weekly newsletter. 4. What

future. (a)What sample size is needed to estimate the population proportion of workers who reported that their jobs were more stress,to within +/- 0.02 with 95% confidence? (b)How many workers need to be sampled in order to estimate the population proportion of workers who worried about retiring comfortably to within +/- 0.02 with 95% confidence? (c )compare the results of(a) and (b).Explain why these results differ. (d)If you were to design the follow-up study,would you use one sample and ask the respondents

When seeking to determine additional information needed to know from the pollster, mainly my first task would be to inquire which hypothesis test technique was utilized. Moreover, once that was known and established and the correct hypothesis test was used then it would be much easier to analyze the results. Furthermore, it is essential to determine and know the direction of the test to use such as would we utilize a two-tailed test, an upper-tailed test, or a lower-tailed test (Mirabella, 2011)

FINAL EXAM PBHE525 Complete the final exam offline during the final exam week. Once you have complete the exam, input your exam into the final exam shell in the exam folder on the course webpage. Good luck 1. 2. 3. 4. 5. 6. 7. 8. US Census statistics show that college graduates make more than $254,000 more in their lifetime than non-college graduates. If you were to question the validity of this observation, what would be your basis for doing so? A. Definition of a college graduate

If increased polarization is associated with a decrease in confidence in the nation’s government, this could indicate at least one undesirable situation that should be changed. Revising the way our government is elected could increase satisfaction, especially if this also attenuated the spread of polarization. To