please help with these questions

1.A breast cancer tumour is classified as T2 if it is between 2-5 cm in diameter. A group of 15 breast cancer patients were classified as having T2 tumours. They tried an experimental drug for 3 months and then had their tumours remeasured. Below are the results (in cm):

Before Treatment: Mean= 3.74 Standard deviation= 0.80

After 3 Months of Treatment: Mean= 3.04 Standard deviation = 0.70

Sum of the differences = -10.5

Sum of the differences, squared = 110.25

Sum of squared differences = 8.57

What are the degrees of freedom? Write null and alternative hypothesis and determine, at = 0.05,if the experimental drug decreased tumour size?

2.We are testingH₀: 42; versusH_A: > 42. When= 45,s= 1.2, andn= 15, at = .01 we do not reject the null hypothesis. (Assume that the population from which the sample is selected is normally distributed.)

True

False