Come on pls i've posted this before : (

Which is the graph of this function 3 square root of x plus one if

Which equation represents a direct linear variationa. y=x2b. y=2/5xc. y=1/xd. y=x+3

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.