Elementary Statistics

Classify the statement as nominal-level, ordinal-level, interval-level, or ratio-level measurement.

Temperatures inside 10 pizza ovens.

• Nominal

• Interval

• Ordinal

• Ratio

Classify the statement as nominal-level, ordinal-level, interval-level, or ratio-level measurement.

Weights of selected cell phones.

• Nominal

• Interval

• Ordinal

• Ratio

Classify the statement as nominal-level, ordinal-level, interval-level, or ratio-level measurement.

Salaries of the coaches in the NFL.

• Nominal

• Interval

• Ordinal

• Ratio

What is the mode on the given data

12, 15 19, 17, 12, 10, 18, 20, 25, 18, 13, 9

• 12 & 18

• 18

• 19

• 19 & 20

------------- is when relatively few of the scores fall at the low end of the distribution.

• Negative skew

• Positive skew

• Bimodal distribution

• Normal curve

When making a histogram, what goes along the bottom line?

• Frequency

• Value

• Midpoint

• Median

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

• H₁ = k

• H₁ < k

• H₁ > k

• H₁ ≠ k

Define a Type I error?

• The failure to reject a false null hypothesis

• The acceptance to reject a null hypothesis

• Rejecting a true null hypothesis

• Accepting a true null  hypothesis

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 = 18.4

  H₁ = 18.4

• H₀ = 18.4

  H₁ < 18.4

• H₀ = 18.4

  H₁ > 18.4

• H₀ = 18.4

  H₁ ≠ 18.4

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

• When n < 30

• When n ≥ 30

• When all of the planets align

• When the lecturer says so