Question

Asked Oct 30, 2019

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Please show TI 84 steps

Step 1

**Note:**

Hey, since there are multiple sub-parts question posted, we will answer first three sub-parts. If you want any specific sub-part question to be answered then please submit that sub-part question only or specify the sub-part question number in your message.

Step 2

**a. Computation of 95% confidence interval for the population mean for n=60, x-bar=32:**

Here, *x-*bar=32; standard deviation is *σ*=20; and *n*=60.

Step-by-step procedure to find the 95% confidence interval for the population mean using ti-84 calculator:

- Enter
**STAT > TESTS > 7: Z Interval…** - Choose
**Inpt:Stats.** - Enter
**σ=20, x-bar:32, n:60, and C-Level:.95**. - Click on
**Calculate.**

Thus, the output obtained as **(26.939, 37.061).**

Therefore, the 95% confidence interval for µ for *n=*60, x-bar=32 is** (26.939, 37.061).**

Step 3

**b. Computation of 95% confidence interval for the population mean for n=200, x-bar=119:**

Here, *x-*bar=119; standard deviation is *σ*=20; and *n*=200.

Step-by-step procedure to find the 95% confidence interval for the population mean using ti-84 calculator:

- Enter
**STAT > TESTS > 7: Z Interval…** - Choose
**Inpt:Stats.** - Enter
**σ=20, x-bar:119, n:200, and C...**

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