Kin 370 Exam 1 (Ch 1 & 3)

An aerobics instructor wants to know if the proportion of males to females in her aerobic class is the same as that in her circuit training class. The correct statistical test to use is?

chi-square

r2 is called?

coefficient of determination

In a study on the relation between age (10, 12, 14) and gender on body fat, what is (are) the independent variable(s)?

gender and age

Norm- referenced comparisons involve comparisons between?

individuals

The level of measurement that, at best, can rank subjects is?

ordinal

A cross country coach interested in comparing over-distance training to distance interval training. The dependent variable for this study would be?

performance timing

The purpose of testing is to?

provide the teacher with information

The percentage of variance in one variable accounted for or shared by another variable denoted by?

r2

The measure of a variable in a sample is called the?

statistic

In regression equation, c stands for?

the score when the predictor score is zero

What does the coefficient of determination tell you?

the shared variance between two variables

The standard deviation is an indication of?

the variability of a set of test scores around the mean

Which is the null hypothesis for the working hypothesis "there is a difference in serving accuracy between varsity and junior varsity volleyball players"?

there will be no difference between two groups

Which of the following is a true statement about dependent variables?

they are measured

An investigation was conducted on how the time of year (fall, winter, spring, summer) affects body weight and basal metabolic rate. What is (are) the independent variables(s)?

time of year

What kind of relationship would you expect to find if you correlate the % body fat (x) with 1.5 mile run test scores (y)

very high, negative correlation (example: r = -.88)

In regression equation to predict game performance from a skill test, the b is .002 and the c is 14, how well can this skill test predict game performance?

very poorly

Which correlation coefficient shows the strongest relationship between two variables?

-.87

The range of values for Pearson product-moment correlation coefficients is from?

-1.00 to +1.00

An example of correlation coefficient (r) which shows little or no relationship between two variables would be?

0.17

Having to pass a swimming proficiency test prior to enrolling in an Advanced Swimming Course is an example of?

a criterion referenced standard

Which of the following does not belong with the other three?

a) standard deviation b) range c) variance d) mean Answer: B

The hypothesis "body weight affects pull up test scores" is an what hypothesis?

alternative

A fitness instructor is concerned with pretest to post test differences in percent body fat for students in a water aerobic class. The correct statistic the teacher should use to examine the mean difference is?

dependent t-test

In regression, error (E) means?

differences between measured score (Y) and predicted score (Y)

Which pair of "scores" represents the same level of measurement?

distance and height

The most stable measure of central tendency with interval data?

mean

Which of the following is not affected by the values of every score in the set on which it is calculated?

median

Ranking scores from highest to lowest makes it easier to find which of the following measures?

median and mode

The independent variable for a study comparing the difference in VO2max between a circuit training class and an aerobics class would be?

methods of training