Review Quiz in Second Unit Test in Statistics and Probability

It is a proposed explanation, assertion, or assumption about a population parameter or about the distribution of a random variable.

• Hypothesis Testing

• Statistics

• Probability

• Hypothesis

Which of the following is not an option for an alternate hypothesis? 

• H_a = k

• 
  H_a < k

• 
  H_a > k

• H_a ≠ k

The weight of the average 6th grade student's backpack (with books in it) is 18.4 lbs. The principal of the school thinks that the backpack does not weight 18.4 lbs. What is the null and alternate hypothesis? 

• H₀: μ = 18.4
  H_a: μ = 18.4

• 
  H₀: μ = 18.4
  H_a: μ < 18.4

• H₀: μ = 18.4
  H_a: μ > 18.4

• H₀: μ = 18.4
  H_a: μ ≠ 18.4

H₀: μ = k

H_a: μ ≠ k

What kind of tail test is to be use for these hypotheses?

• Left-tailed test

• Right-tailed test

• Two-tailed test

• No test

H₀: μ = k

H_a: μ > k

What kind of tail test is to be use for these hypotheses?

• Left-tailed test

• Right-tailed test

• Two-tailed test

• No test

H₀: μ = k

H_a: μ < k

What kind of tail test is to be use for these hypotheses?

• Left-tailed test

• Right-tailed test

• Two-tailed test

• No test

When do you use a t-value instead of a z-value? 

• 
  When n < 30

• When all of the planets align

• When n ≥ 30

• When Ma'am Sette said to

Numerical value that describes the characteristics of a population?

• Parameter

• Statistic

• Statistics

• Probability

Numerical value that describes the characteristic of a sample?

• Parameter

• Statistic

• Statistics

• Probability

Which of the following symbols represents the sample mean?

• μ

• σ

• s