Between 15 and 20 miles per gallon.
Answer:
13.615
Step-by-step explanation:
Answer:
Area of circle = π r ^ 2
= 3.14 × ( 42) ^ 2
= 5538.96 in^2
If you need any other help , please let me know ! [ you'll have to pay btw]
Step-by-step explanation:
a. The point estimate is the mean, 47 days.
b. The margin of error is the critical value times the standard error.
At 31 degrees of freedom and 98% confidence, t = 2.453.
The margin of error is therefore:
MoE = 2.453 × 10.2 / √32
MoE = 4.42
c. The confidence interval is:
CI = 47 ± 4.42
CI = (42.58, 51.42)
d. We can conclude with 98% confidence that the true mean is between 42.58 days and 51.42 days.
e. We can reduce the margin of error by either increasing the sample size, or using a lower confidence level.
