mamasbug4285
29.07.2020 •
Mathematics
A company offering online speed reading courses claims that students who take their courses show a 5 times (500%) increase in the number of words they can read in a minute without losing comprehension. A random sample of 100 students yielded an average increase of 415% with a standard deviation of 220%. Calculate a 95% confidence interval for the average increase in number of words students can read in a minute without losing comprehension. Choose the closest answer.
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Ответ:
C.I = (371.88 , 458.12)
Step-by-step explanation:
Given that:
sample size n = 100
sample mean 415
standard deviation = 220
The objective is to calculate the 95% confidence interval for the average increase in number of words students who can read in a minute without losing comprehension.
At 95% confidence interval; level of significance ∝ = 1 - 0.95
level of significance ∝ = 0.05
The critical value at is 1.96
C.I =
C.I =
C.I =
C.I =
C.I =
C.I =
C.I = (371.88 , 458.12)
Ответ:
p×q to the 9th power
Step-by-step explanation:
There is only one p. Then multiplying the q together 9 times in simpler terms could be made to q to the 9th also meaning multiply 9 times.