Statistical Analysis

A researcher is designing a study to assess free-throw ability in

basketball. How could they improve the reliability of the data?

I. Increase the number of participants

II. Allow participants to record their own scores

III. Increase the number of trials per participant

• A. I and II only

• B. I and III only

• C. II and III only

• D. I, II and III

A group of baseball players hit both left handed and right handed. The

mean distance travelled by the ball is shown in the chart. What might be

concluded about the statistical significance of the data?

• A. LH group hits significantly further than the RH group.

• B. RH group hits significantly further than the LH group.

• C. LH group hits significantly shorter than the RH group.

• D. RH group does not hit significantly further than the LH group.

A student measures flexibility using five trials of the sit and reach test.

They record the same result for each trial for the first participant. Which

does this provide evidence for?

• A. Specificity

• B. Accuracy

• C. Reliability

• D. Validity

Alex signs up at the local gym and is required to complete a Physical

Activity Readiness Questionnaire (PAR-Q). What is the purpose of this

questionnaire?

• A. To determine their level of fitness

• B. To determine how long they will be able to exercise for

• C. To determine their pre-existing skill level

• D. To determine their pre-existing health conditions

An athlete completed five timed trials of a 20 m sprint test. What is the

mean time?

• A. 3.90 s

• B. 3.95 s

• C. 4.00 s

• D. 4.05 s

What does a large standard deviation indicate?

• A. The data is clustered closely to the mean.

• B. The data is spread widely around the mean.

• C. The data is normally distributed.

• D. The data is not normally distributed.

Which procedure would assess the reliability of an experiment?

• A. Repeat the experiment to determine if the results remain the same

• B. Test the degrees of precision of the instruments

• C. Conduct similar tests that measure changes in the same dependent variable

• D. Determine how close the measurements are to the true value

What makes a fitness test reliable?

• A. It is repeatable.

  .

• B. It is relevant to a given sport.

• C. It is inconsistent.

• D. It measures the factors that it is designed to measure

Which fitness test provides an assessment of muscle endurance?

• A. Hand grip dynamometer

• B. Maximum push-ups

• C. Harvard step test

• D. Standing broad jump

What can be represented by error bars on graphs?

• A. Reliability of data

• B. One standard deviation of data

• C. Percent change of data

• D. Validity of data