WorksheetsQLS UNIT 2 REVIEW FOR YOU
Total questions: 18
Worksheet time: 58mins
Find the z-score of 7 if mean=8 and SD=2.3
(Round to the first decimal place)
(a)
Find the z-score of 3.1 if mean=3.9 and SD=0.4
(Round to the first decimal place)
(a)
Find the z-score of 104 if mean=100 and SD=3
(Round to the first decimal place)
(a)
Adam's Z-score on a test is +2.50. What does this mean?
Adam's score has a 2.5% chance of being better than any other randomly selected score.
Adam's test score was better than 25% of his peers.
He scored 2.5 standard deviations above the average.
He did terrible.
Joanne's score on a test gives her a Z-score is -1.50. What does this mean?
Joanne didn't take the test yet.
Joanne's test score is 1.50 standard deviations below the average test score.
Joanne did better than 1.50 times her peers.
Joanne's test score, on average, was 1.5 points lower than the other test scores.
What is the purpose of z-scores?
to describe the exact location of a score within a distribution
to find the mean of the distribution
to describe the shape of the distribution
to find the standard deviation of the distribution
In a normal distribution, what percent of the values lie above the mean?
13.5%
34%
50%
68%
500 juniors at Central High School took the ACT last year. The scores were distributed normally with μ=24 and σ=4.
What ACT score is 3 standard deviations below the mean?
12
16
20
21
LSRL & SCATTER PLOTS
You are analyzing a scatter plot that has a negative correlation. What is true of the of the x and y values?
LSRL & SCATTER PLOTS
What type of association does this graph have?
LSRL & SCATTER PLOTS
What type of association does this graph show?
The following data shows prices of meal options at Bob’s Burgers.
Prices of Meal Options at Bob’s Burgers
$6 $7 $7 $8 $9 $14 $14 $14 $15 $15 $15 $15 $16 $16 $17
Which histogram correctly displays the information above?
