Question

1. A major consumer products company wants to measure the quality of the packaging of their products on the store shelves. Five large cities are chosen in different parts of the country. What sampling method is being used for this sampling plan?

2. In a simple regression model Y = ß0 + ß1X + ε, Y represents the ________.

3. In a simple regression model Y = ß0 + ß1X + ε, ß0 represents the ________.

4. What sample size would be required to translate a population standard deviation from 2.9 to a standard error of the mean that is 1/10 of the standard deviation?

5. What are the steps in hypothesis testing?

Answer 1

(1)

Sampling method used:

cluster sampling

Explanation:

The researcher divides the population into seperate groups,called clusters.Then a SimpleRandom Sample ofclusters is selected from the population.

(2)

Y represents

dependent variable

(3)

$\beta$0 represents:

y - intercept

(4)

$\sigma$ = 2.9

SE = $\sigma$/$\sqrt{n}$ = $\sigma$/10

So,

Vn 10

So,

n = 100

So,

Answer is:

100

(5)

Steps in Hypothesis Testing:
Step 1: State the Null Hypothesis: H0

Step 2:State the Alternative Hypothesis: HA

Step 3: Set Significance level $\alpha$

Step 4: Collect data

Step 5: Calculate Test Statistc

Step 6: Calculate Rejection Regions

Step 7: Based on Steps 5 and 6, draw a conclusion about H0.