STAT AND PROB - 11 Q4 EXAM

What type of error occurs if you fail to reject H0 when, in fact, it is not true?

• type II
• type I
• Type I or Type II, depending on α
• Type I or Type II, depending on tail

What do we call an assumption that is made about the value of a population parameter?

• hypothesis
• conclusion
• confidence
• significance

What is the probability of committing a Type I error when the null hypothesis is true?

• the confidence level
• the hypothesized mean
• greater than 1
• the level of significance

Which of the following is true about hypothesis testing?

• the smaller the Type I error, the smaller the Type II error will be
• the smaller the Type I error, the larger the Type II error will be
• Type II error will not be effected by Type I error
• the sum of Type I and type II errors must equal to 1

What hypothesis tests whether the average daily confirmed cases of COVID-19 in the Philippines is equal to 659 per million population?

• Ho
• Ha
• both Ho and Ha
• neither Ho nor Ha

Which hypothesis tests whether the average daily confirmed cases of COVID-19 in the Philippines is greater than 659 per million population?

• Ho
• Ha
• both Ho and Ha
• neither Ho nor Ha

Which hypothesis tests whether the average number of students per class in the new normal is less than 20?

• Ho
• Ha
• both Ho and Ha
• neither Ho nor Ha

Which hypothesis tests whether the average number of hours that Filipino internet users spend each day during the ECQ is greater than 10.03 hours?

• Ho
• Ha
• both Ho and Ha
• neither Ho nor Ha

Identify the test statistics for each of the following. Given: X̄ = 24, μ = 22, σ = 3.5, n = 50.

• t-test statistic
• z-test statistic

Identify the test statistics for each of the following. Given: X̄ = 120, μ = 115, σ = 10, n = 25

• t-test statistic
• z-test statistic