Statistics questions***
Not what you're looking for?
I. Jane Smith is a student in the MBA 751 Econometrics course and she received an 83.6% on her final exam grade. The mean of exam scores is expected to be a 75% with a standard deviation of 8.5%. Compute a Z-score for Jane.
II. John Doe is looking at an investment in Acme, Inc. bond offering. Acme, Inc.'s bonds have an annual return of 17.2% (i.e., mean gain of 17.2%) with a standard deviation of 21.5%. A return of 0% means the value of the bond doesn't change, a negative return means that the bond loses money, and a positive return means that the bond gains money. What percent of years does this bond lose money? (NOTE: This is similar to Ex. 3.8 from Diez.)
III. Mount Saint Mary's College has conducted a survey of 144 students on the price of textbooks purchased for ACCT201. Prof. Susan Johns wants to determine if her selection of a textbook for next semester has a reasonable cost based on the previous costs for books. The sample mean for the costs of books from the survey was $123.45. The sample standard deviation was $48.24.
i. Calculate the Expected Standard Error.
ii. Construct a 95% Confidence Interval for the sample of book costs. (NOTE: Remember that for a 95% confidence interval the Z-score is 1.96.)
iii. Prof. Johns has developed a hypothesis test to determine the book she has selected with a price of $130.95 is reasonable.
1. H0 is that the book selection is not reasonable because is fall outside of the confidence interval (found in part ii.)
2. Ha is that the book selection is reasonable because is fall within the confidence interval (found in part ii.)
Why hypothesis is correct? Why?
Purchase this Solution
Solution Summary
The investments for statistics in econometric are determined.
Solution Preview
I. Jane Smith is a student in the MBA 751 Econometrics course and she received an 83.6% on her final exam grade. The mean of exam scores is expected to be a 75% with a standard deviation of 8.5%. Compute a Z-score for Jane.
Z score=(Jane's score-mean of exam scores)/standard deviation
=(83.6%-75%)/8.5%
=1.012
II. John Doe is looking at an investment in Acme, Inc. bond offering. Acme, Inc.'s bonds have an annual return of 17.2% (i.e., mean gain of 17.2%) with a standard deviation of 21.5%.A return of 0% means the value of the bond doesn't change, a negative return ...
Education
- BEng (Hons) , Birla Institute of Technology and Science, India
- MSc (Hons) , Birla Institute of Technology and Science, India
Recent Feedback
- "Thank you"
- "Really great step by step solution"
- "I had tried another service before Brain Mass and they pale in comparison. This was perfect."
- "Thanks Again! This is totally a great service!"
- "Thank you so much for your help!"
Purchase this Solution
Free BrainMass Quizzes
Know Your Statistical Concepts
Each question is a choice-summary multiple choice question that presents you with a statistical concept and then 4 numbered statements. You must decide which (if any) of the numbered statements is/are true as they relate to the statistical concept.
Measures of Central Tendency
Tests knowledge of the three main measures of central tendency, including some simple calculation questions.
Terms and Definitions for Statistics
This quiz covers basic terms and definitions of statistics.
Measures of Central Tendency
This quiz evaluates the students understanding of the measures of central tendency seen in statistics. This quiz is specifically designed to incorporate the measures of central tendency as they relate to psychological research.