Answer: The value of test statistic is 2.442.
Step-by-step explanation:
Since we have given that
n = 238
Sample mean = 23.2 minutes
Standard deviation = 20.26 minutes
Hypothesis :

So, the test statistic value would be

Hence, the value of test statistic is 2.442.
There are 10,000 possible values the digits 0 and 9 can be arranged as a 4-digit number.
Answer:
x= -21
Step-by-step explanation:
-1/3=7/x
-1x=21
-1x/-1=21/-1
x= -21