Task 3: Read the following statements and identify the errors.

1. Thousands of years ago, Ptolemy declared that the earth is flat.

2. Bryan thinks that he is a six-footer. His actual height is 156 cm.

3. On a beachfront, a signage reads, "No littering of plastic wrappers, empty bottles, and cans." A few yards away, environmentalists are picking up the rubbish left behind by picnic lovers.

4. Mark says "I am virtuous!" In the next moment, he finds himself in jail.

5. On a moonlit night, a young man declares that there are two moons.

Task 4: Answer one item.

1. James says that he is not bald. His hairline is just receding. Is he committing

an error? If so, what type of error (Type I or II)?

Task 5: (Example)

Suppose that is the average number of songs on an MP3 player owned

by a student. Write down the description of the null hypothesis H0: u = 128.

Answer: The average number of songs on an MP3 player is 128.

To do (for task 5): In the given example, write down the description of the alternative

hypothesis H1: u (is not equal sign) 128.

Task 6: A study claims that adults watch television an average of 1.8 hours per

day. Identify which of the following statements is the null and alternative

hypotheses.

a. The average hours per day of adults watching television is 1.8.

b. The average hours per day of adults watching television is not 1.8.

After identifying, write the null and alternative hypotheses in symbols.

And then, individually, give an erroneous statement and identify the type of error

being emphasized.