Answer:
The answer is row C
Step-by-step explanation:
6 - 3 = 3
Answer:
10 offices
Step-by-step explanation:
the ratio is 5/6 so if the time is doubles the number of offices cleaned also doubles.
5/6 x 2 =10/12 so, 10 offices cleaned.
Answer:
False
Step-by-step explanation:
given that a race car driver tested his car for time from 0 to 60 mph, and in 20 tests obtained an average of 4.85 seconds with a standard deviation of 1.47 seconds.
Sample size n = 20
since population standard deviation is not known, we can use t critical value for finding out the confidence interval
df=19
t critical = 2.045
Margin of error = 
conidence interval = Mean±Margin of error
= 
The given confidence interval is (4.52, 5.18)
Hence the statement is false.