The time in minutes for each of Sam's phone calls this week are shown in the list:
{9, 15, 5, 7, 9, 12, 11, 4}
Which statement is true regarding the duration of his calls?
Question 2
2.
For the data set shown below, which measure is the greatest?
{5, 6, 6, 8, 9, 10}
Question 3
3.
Jordan and Alex are pitchers for the baseball team and are being evaluated by the coach. The speeds in miles per hour of each of their practice pitches is shown to the left.
Which statement is true?
Question 4
4.
The box-plot shows the heights in centimeters of high school seniors compared to their heights as freshman. Using the median as the measure, which is closest to the difference in height between the freshman and seniors?
Question 5
5.
Find the standard deviation for the test scores given in the following stem and leaf plot.
Question 6
6.
A baker recorded the number of batches of cookies he made
on each of seven days. He baked a different number of batches of cookies each day. The box plot to the right summarizes his data.
The baker baked 20 batches of cookies on the eighth day. he redraws the box plot to include his data. Which statement comparing the new box plot to the original box plot is NOT true?
Question 7
7.
The number of points two basketball teams scored is shown in the diagram below.
Team A scored a different number of points in each of the team's 20 games.
Team B scored a different number of points in each of the team's 12 games.
What percentage of time did Team A score more points then Team B?
Question 8
8.
Which statement correctly defines the standard deviation?
Question 9
9.
A data set has a mean of 68 and a standard deviation of 6. An element in this set is 51. What is the z-score for 51?
Round to 2 decimal places.
Show for partial credit if incorrect.
Question 10
10.
The mean number of boxes of cookies sold by each girl scout in Emma's troop was 28 with a standard deviation of 8. If Emma's z-score was -1.5, how many boxes of cookies did she sell?
Show work for partial credit if incorrect
Question 11
11.
Jake scored a 94 on his last quiz, which was exactly 2 standard deviations above the mean of his class. If the standard deviation was 3, what was the mean grade on the quiz?
Question 12
12.
The data set shown has a mean of 34 and a standard deviation of 9. How many of these data points has a z-score less than 0.7?
{20, 22, 24, 28, 33, 35, 38, 40, 42, 45, 47}
Question 13
13.
The table below shows the number of dollars raised during a fundraiser for four different classes and for one student in each class. Which of the four students raised the greatest number of dollars?
Question 14
14.
Statistical information for a data set is given below.
The mean of the data set is 28.
The standard deviation for the data set is 3.
The z-score for a data point in this set is -1.5.
In which interval is this data point?
The mode is greater than 7.
Alex's median speed is higher than Jordan's mean speed.