Answer:
x = 1
Step-by-step explanation:
2(76x - 1) = 150
76x - 1 = 75
76x = 76
x = 1
which one is closest from that list? well, pretty sure you already know.
Answer:
Step-by-step explanation:
Answer: (143.07, 158.93)
Step-by-step explanation:
The formula to find the confidence interval is given by :-
where n= sample size
= Sample mean
z* = critical z-value (two tailed).
= Population standard deviation
We assume that the underlying population distribution is normal.
As per given , we have
n= 108
Critical value for 99% confidence level = 2.576 (By using z-table)
Then , the 99% confidence interval for the population mean hours spent watching television per month :-
Hence, the required 99% confidence interval for the population mean hours spent watching television per month. = (143.07, 158.93)