Answer:
2
Step-by-step explanation:
12.6 divided by pi= 4.01
sqaure root of 4 is 2
Answer:
(0.0706, 0.1294)
Step-by-step explanation:
Confidence interval of a proportion is:
CI = p ± CV × SE
where p is the proportion,
CV is the critical value (z score or t score),
and SE is the standard error.
The sample is large enough to estimate as normal. For 95% confidence level, CV = z = 1.96.
Standard error for a proportion is:
SE = √(pq/n)
SE = √(0.1 × 0.9 / 400)
SE = 0.015
The confidence interval is:
CI = 0.1 ± (1.96)(0.015)
CI = (0.0706, 0.1294)
Round as needed.
Answer:
The answer is B and D.
Step-by-step explanation:
I hope this helped and if it did I would appreciate it if you marked me brainliest. Thank you and have a nice day!
It at the top all you had to do was divided bot ways you will get that answers
Answer:
Flight tickets
Step-by-step explanation:
Without the cost of flight tickets added to the mix, the average ticket cost is £7.55, and the range of ticket costs is £3.3.
The cost of flight tickets is more than 50 times the previous range above the highest ticket cost otherwise. Hence it can be considered an outlier in the data set.
