Answer:
c) (9.08, 9.92)
Step-by-step explanation:
The formula for Confidence interval =
Mean ± z + Standard deviation/√n
Mean = 9.5 minutes
Standard deviation = 1.5 minutes
n = random number of samples = 49
z = z score of 95% confidence interval = 1.96
Confidence interval = 9.5 ± 1.96 × 1.5/√49
Confidence interval = 9.5 ± 1.96 × 1.5/7
= 9.5 ± 0.420
Hence,
9.5 - 0.42
= 9.08
9.5 + 0.42
= 9.92
Therefore, the confidence interval =(9.08, 9.92). Hence, Option C is correct.
Answer:
g
Step-by-step explanation:
Answer:
6 = 600
Step-by-step explanation:
in a decimal number the digits to the left of the decimal point represent a whole number
The area is 24 u add up all the sides
