I have completed a one numerical variable study on proper age to use social media. following are the results

I used 25 values listed below which indicates the proper age for children to be exposed to social media

8, 8, 10, 10 ,10, 11, 11, 12, 12, 12, 12, 12, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 15, 15, 15

I need to determine

1 - the mean, median, mode(s) , variance, standard deviation, and range.

2- is the distribution skewed?

3 - show 3 standard deviation intervals and the percent of values in each and compare with the empirical and chebsyshev's rule

4. find the z scores for at least 4 of the values in data set and describe them using the relative standing value you get

5. find the 75th, 95th, and 99th percentiles for the numerical data

6. define a random variable using data set, classify it and and give probability distribution if possible (table, function or graph)

7. a 95% confidence interval for the mean of your data set (use the normal or t-distribution based on the sample size you choose)