# Qnt 351 Learning Team Week 2

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• Topic: Normal distribution, Standard deviation, Probability theory
• Pages : 9 (1661 words )
• Published : January 15, 2013

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QNT/351 Final Examination Study Guide

This study guide prepares you for the Final Examination you complete in the last week of the course. It contains practice questions, which are related to each week’s objectives. Highlight the correct response, and then refer to the answer key at the end of this Study Guide to check your answers.

Use each week’s questions as a self-test at the start of a new week to reflect on the previous week’s concepts. When you come across concepts that you are unfamiliar with, refer to the Student Guide for that particular week.

Week One: Understanding the Meaning of Statistics

Objective: Explain the role of statistics in business research and its application in business decision making.

1. When TV advertisements report, "2 out of 3 dentists surveyed indicated they would recommend Brand X toothpaste to their patients," an informed consumer may question the conclusion because a. the sample was only 5 dentists

b. the sample of dentists is clearly explained
c. the advertisement does not include the total number of dentists surveyed d. the conclusion is not illustrated with a graph

2. A marketing class of 50 students evaluated the instructor using the following scale: superior, good, average, poor, and inferior. The descriptive summary showed the following survey results: 2% superior, 8% good, 45% average, 45% poor, and 0% inferior. a. The instructor's performance was great!

b. The instructor's performance was inferior.
c. Most students rated the instructor as poor or average. d. No conclusions can be made.

Objective: Differentiate between qualitative and quantitative variables.

3. Which of the following is an example of a continuous variable? a. Family income
b. Number of students in a statistics class
c. Zip codes of shoppers
d. Rankings of baseball teams in a league

4. What type of variable is the number of gallons of gasoline pumped by a filling station during a day? a. Qualitative
b. Continuous
c. Attribute
d. Discrete

Objective: Differentiate among the four levels of measurement and how they are used in data collection for research.

5. What level of measurement is the price of an admission ticket to a movie theater? a. Nominal
b. Ordinal
c. Interval
d. Ratio

6. What level of measurement is a bar code?
a. Ratio
b. Ordinal
c. Interval
d. Nominal

Week Two: Describing Data

Objective: Present qualitative and quantitative data in tables and charts.

7. When data is collected using a quantitative, ratio variable, what is true about a frequency distribution that summarizes the data? a. Upper and lower class limits must be calculated.
b. A pie chart can be used to summarize the data.
c. Number of classes is equal to the number of variable values. d. The "5 to the k rule" can be applied.

8. When data is collected using a qualitative, nominal variable, what is true about a frequency distribution that summarizes the data? a. Upper and lower class limits must be calculated.
b. A pie chart can be used to summarize the data.
c. Number of classes is equal to the number of variable values plus 2. d. The "5 to the k rule" can be applied.

9. Refer to the following breakdown of responses to a survey of room cleanliness in a hotel: [pic]
What percent of the responses indicated that customers were satisfied? a. 20%
b. 25%
c. 50%
d. 100%

Objective: Calculate central tendency and dispersion.

10. What is the relationship among the mean, median, and mode in a symmetric distribution? a. They are all equal.
b. The mean is always the smallest value.
c. The mean is always the largest value.
d. The mode is the largest value.

11. For a data set, half of the observations are always greater than the...