The samples are independent Difference between average scores in the samples equ

Question

The samples are independent Difference between average scores in the samples equals to 79.83 - 67.75 - 12.08. Which formula represents 95 % .coincidence interval for difference between the average scores of all Japanese and all American managers. A 12.09 plus minus 1.984 sqaureroot 11.07^2/211 + 6.41^2/101 12.08 plus minus 1.984 + 0.95 67.75 plus minus 1.984 11.07/squareroot 211 - 79.83 plus minus 1.984 6.41/squareroot 101 12.08 plus minus 1.984 11.07/squareroot 211 99% confidence interval for the difference between the average scores of Japanese and Americal managers is given below. The difference is defined as (Japanese score - American score) 99% intervalL11.50, 16.65) It is reasonable to believe that the average score of Japanese managers is higher than the average score of American managers on by points. 10.2 12.1 8.7 17.3 2.1

Explanation / Answer

10)

Answer is option A)

12.08 + / - 1.984 * sqrt ( 11.07^2 / 211 + 6.41^2 / 101)

11) Answer is option B) 12.1

difference between japanese and american = 12.08 = approx 12.1

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