Q4(9). Apply R to this question, your solution must include R code and R output, Rmarkdown is recommended to present your solution. Please keep you solution clear and easy to read. Unclear solution will not be grade. O for manual solution.

There are one random sample:

4.52, 1.02, 0.27, 10.38, 13.04, -4.10, 8.21, -0.64, 4.35, 2.74, 14.00, 16.05, 5.57, 19.23, 7.52, 7.01, -0.63, 2.78,

7.64, 0.10.

1(3). Apply QQ plot (normal probability plot) to verify if the data is normal.

2(4). Let = 0.05, implement a t-test for the test Ho= 5 vs Ha: > 5. Show the P-value and make conclusion.

3(2). Apply R to calculate 99% t confidence interval of population mean.