A pharmaceutical company is testing the effectiveness of a new drug for lowering cholesterol. As part of this trial, they wish to determine whether there is a difference between the effectiveness for women and for men. Using = .05, what is the value the test statistic? Women Men

A field researcher is gathering data on the trunk diameters of mature pine and spruce trees in a certain area. The following are the results of his random sampling. Can he conclude, at the .10 level of significance, that the average trunk diameter of a pine tree is greater than the average diameter of a spruce tree?

Pine trees Spruce trees
Sample size 40 70
Mean trunk diameter (cm) 45 39
Sample variance 100 150

A. The data do not support the claim because the test value 1.29 is greater than 1.28.
B. The data support the claim because the test value 2.78 is greater than 1.28.
C. The data support the claim because the test value 2.78 is greater than 1.64.
D. The data do not support the claim because the test value 1.29 is less than 1.64. Reset Selection

ANSWER: B

Question 3:

A researcher hypothesizes that the variation in the amount of money spent on business dinners is greater than the variation of the amount of money spent on lunches. The variance of nine business dinners was $6.12 and the variance of 12 business lunches was $0.87. What is the test value?

...7 to 8) and Monopoly & Market Efficiency (expected to be covered in lecture 9 to 10). In each quiz, there are 10 multiple-choice questions, which are randomly selected from the test bank and assigned to each student. Each student is allowed to attempt each quiz via Blackboard ONCE only and there is no time limit for each test. The four quizzes will be posted on Blackboard on 4 October 2010.
The quiz requires in-depth understanding about the...

...1. An article in USA Today stated that ‘Internal surveys paid for by directory assistance providers show that even the most accurate companies give out wrong numbers 15% of the time.” Assume that you are testing such a provider by making 10 requests and also assume that the provider gives the wrong number 15% of the time.
a. Construct a probability distribution to model the situation described above.
It is given the percentages for us and also n=10 so automatically we have to work...

...study is available below:
Car Bus Train Other
Eastern Suburbs 81 161 148 39
Inner West & South 69 209 247 53
North Shore 75 148 165 64
2.
Assume that a 1% level of significance is to be used for the test.
3.
1. Calculate the test statistic, reporting your answer correct to three decimal places.Blank 1
4. Use the tables to determine the lower and upper bounds on the p-value for the test.
2. lower boundBlank 2 (if the lower bound is outside the values of...

...Statistics 1
Business Statistics
LaSaundra H. – Lancaster
BUS 308 Statistics for Managers
Instructor Nicole Rodieck
3/2/2014
Statistics 2
When we hear about business statistics, when think about the decisions that a manager makes to help make his/her business successful. But do we really know what it takes to run a business on a statistical level? While some may think that business...

...STAT 600 Statistics and Quantitative Analysis
PROJECT: Stock return estimation
The project must be done by 6-15 a.m. October, 16th. You should submit your projects before the class begins. This is a group project. Read the course outline for general guidelines. Good luck!
The project is closely related to Lectures 1-5 of the class.
Today is September 15, 2013 and you have just started your new job with a financial planning firm. In addition to studying for all your...

...
MBA 501A – [STATISTICS]
ASSIGNMENT 4
INSTRUCTIONS: You are to work independently on this assignment. The total number of points possible is 50. Please note that point allocation varies per question. Use the Help feature in MINITAB 16 to read descriptions for the data sets so that you can make meaningful comments.
[10 pts] 1. Use the data set OPENHOUSE.MTW in the Student14 folder. Perform the Chi
Square test for independence to determine whether style of home and...

...differs from that obtained from Stepwise and Backward Elimination Method. It is not hard to understand this phenomenon: Since for the Stepwise/Backward Elimination method, F-statistic plays an important role in selecting a variable: the F-statistic for a variable to be added must be significant at the SLENTRY level, the F-statistic for a variable to be removed must be significant at the SLSTAY level. While the MaxR method selects variables depending...

...INTRODUCTION
A. Importance of Statistics
Statistical methods have been applied to problems ranging from business to medicine to agriculture. A review of the professional literature in almost any field will substantiate the extent of statistical analysis.
Accounting: Public accounting firms use statistical sampling procedures when conducting audits for their clients.
Economics: Economists use statistical information in making forecasts about the future of the economy...