Basic Statistics in PHStat
Not what you're looking for?
- Using PHSTat
- Send Excel + Paste into Word also
* Must write out a NULL & HYPOTHESIS and include BUT WHAT DOES THIS MEAN TO A MANAGER??
See attached file for solution template.
Purchase this Solution
Solution Summary
This solution gives the step by step method for solving business statistics problems using PHSTAT
Solution Preview
Please see the attached files.
Must write out a NULL & HYPOTHESIS
and include BUT WHAT DOES THIS MEAN TO A MANAGER??
Problem #1 For this problem use the following contingency table:
A B Total
1 20 30 50
2 30 45 75
Total 50 75 125
The null hypothesis tested is
H0: There is no association between row and column attributes
The alternative Hypothesis
H1: There is association between row and column attributes
Rejection Criteria: Reject the null hypothesis, if the calculated value of chi square is greater than the critical value of Chi square with 1 d.f at 0.05 significance level
a. Find the expected frequency for each cell.
Expected Frequencies
Column variable
A B Total
1 20 30 50
2 30 45 75
Total 50 75 125
b. Compare the observed and expected frequencies in each cell.
The chi square contribution in each cell is given below
Column variable
A B Total
1 0 0 0
2 0 0 0
Total 0 0 0
c. Compare the X2 statistic. Is it significant at alpha () = .05.
Data
Level of Significance 0.05
Number of Rows 2
Number of Columns 2
Degrees of Freedom 1
Results
Critical Value 3.841459
Chi-Square Test Statistic 0
p-Value 1
Do not reject the null hypothesis
Conclusion: Since the Chi Square test Statistic is less than the critical value , the null hypothesis that there is no association between row variable and column is accepted
Problem #2 A survey for Internet users in the United States, Australia, and Europe studied whether those who downloaded music subsequently purchased a CD or tape of the music ("net Music Inspires Buying." USA Today, January 23, 2001, 1A). The survey reported that 77% of Americans, 78% of Australians, and 54% of Europeans who downloaded music get inspired to purchase the CD or tape of music. Suppose the survey was based on a sample of 500 Americans, 250 ...
Purchase this Solution
Free BrainMass Quizzes
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.
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.