1 1 Choose the correct formula that has interval given in the output above " Researcher want to study a new 10 supplement to see if it significantly allact intelligence. Therefore, a sample of 30 participants who have taken the supplement are randomly selected. The following MINITAB output was produced. Test of wa - 190 us me4 - 190 The assumed standard deviation = 15 JE Mean x+za (n - 1)s? (n -1)s2 Mean 2-739 (134.615. 145-3685 2 Vn X 1-40-1 Option 1 _Option 2 S S xtta In-1n x + za 2 Vn Option : option 4 6. ") Explain the meaning of the confidence interval given in the output * 7. ") Can you conclude that the mean IQ is 1007 Why? " QUESTION 2 (A) QUESTION 2(B) A study was conducted to compare the starting salary In RM) of mathematics graduates from The data was further analyzed and the MINITAB output is given balou. bachelor and master degree. Assume that the salary is normally distributed for both populationes with equal variances. the following table summarizes the result. Two-Sample T-Teat and Gi Bachelor Marsto sample 0- 25 35 2101. D 19 2450.0 15 . 1 7 = 3100 Offeranca a mu (1] = mu (21 Intimate for differmen: - -150.901 #80 CT for difference: (P.0. T-Test of difference = 0 (us not =): T-Value = -24. 16 P-Valus = D.030 Both use Pooled Screw - 15.2534 1 What is the critical value for the LOWER LIMIT to construct a 90% confidence interval Ip for the ratio of variances for the two types of graduates. " 12. i) Why is t distribution used to find the confidence interval for the difference in the mean? Give 2 reasons 9. ") What is the critical value for the UPPER LIMIT to construct a 90% confidence interval IF for the ratio of variances for the two types of graduates. " in Based on the MINITAB output above, in constructing a 95% confidence between the mean starting salary of the two groups of graduates, identify the following information: 10. fil Write the 90% confidence interval for the ratio of variances for the two types of 2 graduates. (answer in three decimal place) . White par over WITH NO SPACE AFTER THE COMMA, far summple (0 5353:0al Standard error value : Confidence Interval value (lower limit values, upper Ink value) : 11. i Can you conclude that the assumption that the two populations have equal 2 pic variances is true? Explain why . 13. Arrawar a] "PART 1 [IS MEANT) 5. al Calculate the sample standard deviation value for the above data set (answer in 3 IF PART 1 (10 MARKS) decimal place) " PLEASE ANSWER ALL QUESTIONS IN THE SPACE PROVIDED . Required 6. bj Which formula should be used to find the interval estimate of population standard 1. Email * deviation for the number of grams of carbohydrates ?* Mark only one oval 2. STUDENT'S NAME: . (n - 1)s? (n - 1)s (n - 1)$2 (n - 1)52 Xan- 1 3. MATRIX:" option 1 option 2 4. GROUP. Mark only one oval S RAP22034 x t za - xtta RAS21214 2 Vn 20-1 in Option 3 option 4 The number of grams of carbohydrates in a 12-ounce serving of a regular soft drink for a random sample of 20 sodas are: 7. ) Find the critical value for the lower limit to construct the confidence interval of population standard deviation." 48 37 52 40 41 30 45 34 8. ) Find the critical value for the upper limit to construct the confidence interval of IF population standard deviation. " 9. of Write the 95% confidence interval for population standard deviation for the 2 pc statement above (answer in three decimal place] . Wower WITH NO SPACE AFTER THE COMMA, Example [10 967,12 567] 10. () Find the point estimate of the mean (answer in one decimal place] " 18 11. of Find the critical values to construct the 90% interval estimate for the mean * IF 12. hy Write the 90% confidence interval estimate for the mean (answer in three decimal 2 pc place] - The pour mower WITH NO SPACE AFTER THE COMMA, Example (13 768 30.124) This content is rain arand by Google Google Forms