Select the correct answer. Consider functions fand g.
f(3) =
1 - 1
12 + 1 - 1
g(1) = 3- 2
Using a table of values, what is the approximate solution to the equation f(I) = g(t) to the nearest quarter of a unit?
ОА
I-1.75
OB. .
I-2.25
Ос.
I 0.50
OD.
I 0.75

Arandom sample of n = 25 observations is taken from a n(µ, σ ) population. a 95% confidence interval for µ was calculated to be (42.16, 57.84). the researcher feels that this interval is too wide. you want to reduce the interval to a width at most 12 units. a) for a confidence level of 95%, calculate the smallest sample size needed. b) for a sample size fixed at n = 25, calculate the largest confidence level 100(1 − α)% needed.