C) Suppose you take a sample of 250(n) students. Suppose the sampling
distribution of sample means follow normal distribution, center (same as
population mean u )and standard-deviation( ). Then,
i) Find the probability that a sample mean is below 52.5 inches.
j) Find the range of sample means to be in the middle 95% area.

i think it is 70

step-by-step explanation:

step-by-step explanation:

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step-by-step explanation:

1

option c) graph of line going through 1, 4 and 3, 10

step-by-step explanation:

let y equal to margo's coin collection

let x equal to number of years

at the begining x=0, y=1 → point=(x,y)→point=(0,1)

she adds 3 coins per year, then y=1+3x

at x=1, y=1+3(1)=1+3→y=4→point=(x,y)→point=(1,4)

at x=3, y=1+3(3)=1+9→y=10→point=(x,y)→point=(3,10)

the graph of line going through (1, 4) and (3, 10), then the option c is the correct.