Choose the letter of that corresponds to the correct answer. hello, please answer thank you

1. T-distribution was 3. Df means? * formulated in 1908 by A Degree of fire This done bution is applicable when a c In O B. Degree of food O A Probability distribution O C. Degree of freedom O B. 1-distribution D. Degree of friends O C Frequency Distribution A. Alexander Grahambel Q D. F diabybution O B. William Sealy Gosset 7 paint 6. The population is 12 2 points C. Marie Curie This distribution cable when n 2 30 with 95% confidence. two-tailed, give the A. Probability distribution confidence coefficient. * D. Isaac Newton O B, I-distribution O C. Frequency Distribution D. z-distribution O C. 2.201 2. What is the formula for 2 points O D 1 676 computing the 7. The population is 21 confidence interval? * with 99% confidence 2 points two-tailed, give the confidence coefficient. " O A 2845 O A 0.97 O B. 1,699 O B. 1.38 O C. 2.201 O C. 1.27 O D. 1.676 O D. 2.24 8. The population is 30 2 port 10. O A. 2 points with 97% confidence. two-tailed, give the confidence coefficient. O A 2.845 O A 0.97 O B. 1.699 O B. 1.38 8 + 1 . ( )