Complete parts (a) through (c) below.

a) determine the critical value(s) for a right-tailed test of a population mean at the α = 0.10 level of significance with 15 degrees of freedom.
b) determine the critical value(s) for a left-tailed test of a population mean at the α = 0.10 level of significance based on a sample size of n = 20.
c) determine the critical value(s) for a two-tailed test of a population mean at the α = 0.05 level of significance based on a sample size of n = 18.

a)

b)

c)

Step-by-step explanation:

Part a

represent the significance level

df =15

Since is a right tailed test the critical value is given by:

And we can use the following excel code to find it: "=T.INV(0.9,15)"

Part b

represent the significance level

n=20 represent the sample size

First we need to find the degrees of freedom given by:

Since is a left tailed test the critical value is given by:

And we can use the following excel code to find it: "=T.INV(0.1,19)"

Part c

represent the significance level

n=18 represent the sample size

First we need to find the degrees of freedom given by:

The value of and

Since is a two tailed tailed we have two critical values is given by:

And we can use the following excel code to find it: "=T.INV(0.025,17)"

120 seems like the most sensible answer.

step-by-step explanation:

if there is only one topping on all caramel apples and there's 120 of them. then all apples should/will be covered in sprinkles. make sense?

it is x=-4

step-by-step explanation: