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Frequency
Central Tendency
Measures of Dispersion
Standard Scores
Probability
100
The number of times a score occurs
What is Frequency?
100
The most or frequent score.
What is mode?
100
The difference between the highest score and lowest score in a distribution
What is Range
100
These tell us how far from the mean a raw score is in standard deviation units.
Z-scores.
100
The proportion of times an event would occur if the changes for occurrence were infinite.
What is Probability
200
How do you find cumulative percentage?
Take the cumulative frequency and divide them by the number of scores, then multiply by 100. OR Add the percentage frequencies.
200
The score at the 50th percentile.
What is median.
200
Find the Range of this set of data: 1, 5, 8, 9, 4, 6, 7, 3, 1, 2, 4, 5, 7, 9, 4, 5
Range = 8
200
Convert the score to a z-score: x = 18 average = 13.6 standard deviation = 3.6
z-score = 1.22
200
How do you determine the probability of an outcome?
Probability is equal to the number of ways that an event can occur divided by the number of ways any event of that type can occur.
300
What is the frequency of 11? 3, 13, 5, 6, 14, 13, 4, 7, 9, 12, 9, 7, 9, 11, 8, 11, 8, 11, 9, 12, 8, 9
3
300
The measure of tendency that is most affected by outliers.
What is Mean.
300
Find the variance for the following scores: 5, 7, 3, 4, 8, 2, 9, 0, 6, 3, 4, 8, 8, 6, 2, 2, 10, 6, 6, 7
s2 = 7.38
300
Raymond is a college student who has a long jump z score of 1.22. Calculate his raw score to get a sens of what is considered a good long jump score (Mean 13.6; SD 3.6)
17.992
300
What is the probability that you will get a 4 when rolling a die?
1/6=0.167
400
Fill in the table shown:
Answer on pg 415, #3
400
Find the mean, median and mode for the following: 27, 33, 10, 9, 6, 7, 11, 23, 27
Mode: none Median:11 Mean: 17
400
Find the s for the following data: Sum of squares = 210 Sum of scores = 30 Number of scores = 15
s = 3.27
400
For the Wechsler Adult Intelligence Scale (WAIS), the average score is 100 and standard deviance is 15. Find the z score for an IQ of 92; for an IQ of 127.
z=-0.53 z=1.8
400
What is the probability (in percent) of getting a king in a full set of playing cards?
7.7%
500
Thirty-five soccer players were challenged to do as many sit-ups as possible in 2 minutes. Here are their scores: 37, 48, 29, 50, 13, 34, 47, 29, 40, 16, 27, 45, 25, 38, 18, 28, 33, 20, 35, 14, 23, 15, 18, 33, 38, 50, 11, 16, 25, 40, 44, 12, 13, 20, 14 Use the data to construct frequency cumulative frequency, percentage frequency, and cumulative percentage distributions.
Answer found on page 414. #1
500
The following data represents the number of sentences correctly unscrambled by students in an English class. Determine each of the measures of central tendency.
Mode = 13 Median = 12 Average = 12.57
500
Use the data to compute range, Standard deviation, and variance: X f 5 3 3 8 2 18 1 4
Range = 4 Variance = 1.06 Standard Deviation = 1.03
500
For the IQ test the average score is 100 and the standard deviation is 15. Find the IQ corresponding to a z score of 1.1 and -0.5
IQ = 116.5 IQ = 92.5
500
What is the probability of NOT obtaining a 1 when tossing a die?
.833