The relationship between a statistic and a sample is the asame s the relationship between ______.
c. a parameter and a population
A recent study reports that elementary school students who were given a nutritious breakfast each morning had higher test scores than students who did not receive the breakfast. For this study, what is the independent variable?
c. whether or not a breakfast was given to the students
Determining a person's reaction time (in milliseconds) would involve measurement on a(n) _____ scale of measurement.
d. ratio
What is the value of ?X - 1 for the following scores? Scores: 2, 4, 7
c. 12
What kind of frequency distribution graph is appropriate for scores measured on an interval or ratio scale?
c. either a histogram or a polygon
In a positively skewed distribution, scores with the highest frequencies are _____.
b. on the left side of the distribution
For the following distribution of scores, 20% of the individuals have scores of X = 2... (5,5, 4,4,4,4,4,4,4,4,3,3,3,3,3,2,2,2,1,1
b. False
What is the mean for the following sample of scores?
Scores: 1, 4, 5, 10
c. 5
What is the median for the following set of scores?
Scores: 1, 2, 6, 11, 17
b. 6
What is the mode for the following sample of n = 8 scores? Scores: 0, 1, 1, 2, 2, 2, 2, 3
a. 2
For a negatively skewed distribution with a mean of M = 20, what is the value of the median?
a. greater than 20
A population of N = 6 scores has ?X = 12 and ?X2 = 54. What is the value of SS for this population?
c. 30
A population of N = 100 scores has � (mean) = 30 and ? (standard deviation) = 4. What is the population variance?
d. 16
In a population of N = 10 scores, the smallest score is X = 9 and the largest score is X = 19. Using the concept of real limits, what is the range for this population?
a. 11
To calculate the variance for a sample, SS is divided by N.
False
S2=SS/n-1