Test and measurements chapter 2

What level of measurement is football position?

Nominal

What level of measurement is race placement?

Ordinal

What level of measurement is VO2max?

Interval

What level of measurement is body weight?

Ratio

Which scale has an arbitrary zero?

Interval

Which scale has a true zero?

Ratio

Which football variable is numeric: position or height?

Height

What does Σ mean?

The sum of

What does X represent?

Observed score

What does N represent?

Number of observations

What is the correct order of operations?

Parentheses, Exponents, Multiply/Divide, Add/Subtract

What is a percentile?

Percent of scores at or below a value

What percentile is the median?

50th

What are the three measures of central tendency?

Mean, Median, Mode

Which measure is affected most by outliers?

Mean

What does variability measure?

Spread of scores

How do you calculate range?

Highest minus lowest score

What is variance?

Average squared deviation from the mean

What is standard deviation?

Square root of variance

Mean = median = mode indicates what shape?

Normal distribution

Mean greater than median indicates what skew?

Positive skew

Mean less than median indicates what skew?

Negative skew

What percentage of scores fall within ±1 SD?

68.26%

What percentage fall within ±2 SD?

95.44%

What percentage fall within ±3 SD?

99.74%

What is a z score?

Number of SDs from the mean

What is the T score formula?

T = 50 + 10(z)

What does a z table show?

Area under the normal curve

What is the reference point of the normal curve?

The mean

How do you calculate a combined mean?

Total sum divided by total N