"nine times out of ten" means we have 9/10 = 0.90 = 90% confidence interval.
The center of each interval is 0.80 as this is the mean test score. The margin of error is 0.06 from the statement "within 6% of...". Put another way, the teacher is basically saying that they are 90% confident to find a test score between 74% and 86%
This is because
0.8 - 0.06 = 0.74
0.8 + 0.06 = 0.86
So that's why the confidence interval is (0.74, 0.86)
Answer:
43
Step-by-step explanation:
Answer:
a7= 36
Step-by-step explanation:
a2=16
a3=20
a4=24=4×(n+2)=4×6
a7=36
Answer:
Hello, look at the picture
