MCQs for Statistics and Hypothesis Testing: New drug, tree trunk diameters, and money spent on business dinners.
Not what you're looking for?
If you choose to solve these problems, please show the steps and formulas used.
1. 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. At = .05, what is the value the test statistic?
Women Men
Sample size 50 80
Mean effect 7 6.95
Sample variance 3 4
A. t = 3.252
B. z = 0.455
C. z = 0.081
D. z = 0.151
2. 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 does not support the claim because the test value 1.29 is greater than 1.28.
B. The data supports the claim because the test value 2.78 is greater than 1.28.
C. The data supports the claim because the test value 2.78 is greater than 1.64.
D. The data does not support the claim because the test value 1.29 is less than 1.64.
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?
A. 3.10
B. 9.61
C. 49.50
D. 7.03
Purchase this Solution
Solution Summary
The solution provides answers to multiple choice questions on hypothesis testing. Relevant workings and formula for the calculation are also included. Please refer to the attached Word document for the formatted solution.
Purchase this Solution
Free BrainMass Quizzes
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.
Measures of Central Tendency
Tests knowledge of the three main measures of central tendency, including some simple calculation questions.
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.
Terms and Definitions for Statistics
This quiz covers basic terms and definitions of statistics.