# Questions on Descriptive Statistics

Not what you're looking for?

Listed below are the gross amounts (in millions of dollars) earned in box office receipts for a recent movie. The amounts are listed in order for the first 14 days of the movies release. Find the range, variance, and standard deviation of the data set.

If you invested in this movie, what characteristic of the data set would you care about most and is it a measure of center or variation?

59, 49, 48, 48, 42, 35, 34, 24, 21, 21, 20, 8, 6, 4

6. Refer to the sample data for pre-employment drug screening shown below. If one of the subjects is randomly selected, what is the probability that the test results is a false positive? Who would suffer from a false positive result? Why?

Pre-Employment Drug Screening Results

Positive Test Result Negative Test Result

Drug Use Is Indicated Drug Use Is Not Indicated

Subject Uses Drugs 37 9

Subject Is Not a Drug User 18 32

7. Determine whether the two events are disjoint for a single trial. (Hint: Consider "disjoint" to be equivalent to "separate" or "not overlapping".) Why?

Randomly selecting a piano from the instrument assembly line and getting one that is free of defects.

Randomly selecting a piano from the instrument assembly line and getting one with a missing key.

8. For the given pair of events A and B, complete parts (a) and (b) below.

A: When a baby is born, is it a boy.

B: When a 5-sided die is rolled, the outcome is 1.

a. Determine whether A and b are independent or dependent. (If the two events are technically dependent but can be treated as if they are independent according to 5% guideline, consider hem to be independent.)

b. Find P(A and B), the probability that events A and B both occur.

##### Purchase this Solution

##### Solution Summary

The solution gives detailed steps on solving some questions on descriptive statistics: probability, range, variance, independent events and disjoint events.

##### 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.

##### 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.

##### Terms and Definitions for Statistics

This quiz covers basic terms and definitions of statistics.