Sales of People magazine are compared over a 5-week period at four Borders outlets in Chicago. Are the population variances the same for weekly sales (4 stores)? ITTT Weekly Sales Store 1 Store 2 Store 3 Store 4 102 97 89 100 106 77 91 116 105 82 75 87 115 80 106 102 112 101 94 100 Click here for the Excel Data File (a) Calculate the degrees of freedom. dfi df2 (b) Based on the given hypotheses, choose the correct option. H: o21 = o22 23 24; Hị: Not all the variances are equal at a 0.05 Reject the null hypothesis if H> 20.6 Reject the null hypothesis if H< 20.6 (c) Calculate the value of Hcalc- (Round your answer to 2 decimal places.) Hcalc (d) Should we reject the null hypothesis? No Yes
Inverse Normal Distribution
The method used for finding the corresponding z-critical value in a normal distribution using the known probability is said to be an inverse normal distribution. The inverse normal distribution is a continuous probability distribution with a family of two parameters.
Mean, Median, Mode
It is a descriptive summary of a data set. It can be defined by using some of the measures. The central tendencies do not provide information regarding individual data from the dataset. However, they give a summary of the data set. The central tendency or measure of central tendency is a central or typical value for a probability distribution.
Z-Scores
A z-score is a unit of measurement used in statistics to describe the position of a raw score in terms of its distance from the mean, measured with reference to standard deviation from the mean. Z-scores are useful in statistics because they allow comparison between two scores that belong to different normal distributions.
Hi,
I need help with the attached homework question and below is the excel data file for you as well.
| Store 1 | Store 2 | Store 3 | Store 4 |
| 102 | 97 | 89 | 100 |
| 106 | 77 | 91 | 116 |
| 105 | 82 | 75 | 87 |
| 115 | 80 | 106 | 102 |
| 112 | 101 | 94 | 100 |
Thanks!
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