Mia needs $15 to purchase a new set of headphones. She is saving part of her allowance each week. The graph represents the situa
tion described. (Forgot the graph last time)
1 answer:
You might be interested in
Answer: C. 12.5
Step-by-step explanation:
Given : A manufacturer of new light bulbs claims the average lifetime of its long-life bulb is more than 4000 hours.
Population mean :
Sample size : n= 100
Sample mean :
Standard deviation:
The value of test-statistic is given by :-
Hence, the value of the test statistic for this problem is 12.5.