Question

Chapter 9:

Note: For all problems except 1, to get full credit you need to state the hypotheses and write a conclusion that includes how confident you are in the alternative. See the Chapter 9 HT Confidence Approach handout and Lecture notes 14, and 15 for details, especially for suggestions (RoTs) on writing up conclusions clearly.

1. Set up a hypothesis for the following problems(1 pt) Just, just set up hypotheses.

Remember that the null hypothesis always contains the = sign and that the alternative hypothesis never does. Read the problem, determine whether it is a problem concerning a pop mean (μ) or a pop proportion (π), and then find the specific question to be answered.

Both parts (a) and (b) should have an H₀ and an H₁.

2. You believe that the average price of a smart phone is greater than $800
3. you believe that the average Salary for a Waiter at a restaurant is equal to $15 per hour.
4. You believe that the portion of people who like coffee is equal to 60%

Answer 1

Here we just need to set up hypotheses and determine whether problem concerning a population mean or a population proportion .

1. You believe that the average price of a smartphone is greater than $800.

Ans: The problem is related to the population mean .

2. You believe that the Average Salary for a Waiter at a restaurant is equal to $15 per hour.

Ans: The problem is related to the population mean .

3. You believe that the portion of people who like coffee is equal to 60%

Ans: The problem is related to the population proportion .