Step 1: Convert , which is in radians into degrees. To convert it multiply by
900/12
75
Step 2: 75 degrees isn't on the unit circle but 45 degrees and 30 degrees is. Since 45 + 30 = 75 you can use the cosine of 45 and 30 to find the exact value
cos45 =
cos30 =
Step 3: Add the cos45 and cos30 to get cos5pi/12
Hope this helped!
Answer:
t = 3.156
Step-by-step explanation:
N = 9
Please check attachment for the table
ED = 89
ED² = 1587
Bar D = 89/9
= 9.8889
The standard deviation s
= √14283-7921/81
= √78.5432
S = 8.8625
The test statistic
= 9.8889/8.8625/√9-1
= 9.8889/3.1334
= 3.156
From the calculations above, the calculated test statistic t is = 3.156.
Please check the attachment for a more detailed solution to this problem.
Thank you!
