Question

A random sample of university students was obtained, and the number of tweets in a typical month was recorded:

Index, I	Number of tweets
1	1
2	3
3	19
4	30
5	88
6	99

1. Compute fi=(i-0.375)/(n+0.25)

2. Find the z-score corresponding to fi from TableV

3. Plot the observed values on the horizontal axis and the corresponding

   expected z-score on the vertical axis

4. UsingExcel(data - data analysis->regression)to obtain the linear

   correlation coefficient between observed values and expected z-score.

5. Determine the critical value in TableVi to access the normality of the data.

Answer 1

By using the formula we can calculate fi where fi=(i_0.375)/(n+0.25)

For cal the zscore value we should cal mean and stand dev afterwards we cal correlation coefficient between no of tweets and zscore using the correl function in excel.the negative values indicates inverse relationship between two variables.one increase other decrease I.e vucevarsa