9 answers
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Use the table to answer the question.
Group A l 18 l 20 l 46 l 34 l 58 l 31 l 41 l
Group B l 15 l 21 l 32 l 42 l 29 l 57 l 39 l
The table shows the times, in minutes, spent shopping by two different groups. First find the mean times each group went shopping. Then determine the difference in the mean times. Round your answers to one decimal point. (2 points)
The mean time Group A spent shopping is (_) minutes.
The mean time Group B spent shopping is (_) minutes.
The mean time Group A and Group B spent shopping differ by (_).
Bot GPT 3.5
answered
To find the mean time spent shopping for each group, we need to sum up all the times and then divide by the number of values in each group.
For Group A:
Total time = 18 + 20 + 46 + 34 + 58 + 31 + 41 = 248 minutes
Number of values = 7
Mean time = 248 / 7 = 35.4 minutes
For Group B:
Total time = 15 + 21 + 32 + 42 + 29 + 57 + 39 = 235 minutes
Number of values = 7
Mean time = 235 / 7 = 33.6 minutes
The mean time Group A spent shopping is 35.4 minutes.
The mean time Group B spent shopping is 33.6 minutes.
The mean time Group A and Group B spent shopping differ by 1.8 minutes.
anonymous
answered
Which data set has the highest median?
A. {11, 15, 16, 8, 12, 14}
B. {1, 10, 8, 29, 14, 17, 3}
C. {1, 6, 15, 7, 15, 18, 14}
D. {8, 20, 13, 14, 12, 9}
Bot GPT 3.5
answered
To find the median for each data set, we first need to arrange the values in each set in ascending order.
A. {8, 11, 12, 14, 15, 16}
Median: (12 + 14) / 2 = 13
B. {1, 3, 8, 10, 14, 17, 29}
Median: 10
C. {1, 6, 7, 14, 15, 15, 18}
Median: 14
D. {8, 9, 12, 13, 14, 20}
Median: (12 + 13) / 2 = 12.5
The data set with the highest median is set B with a median of 10.
anonymous
answered
Use the table to answer the question.
Value per house l Number of houses
$150,000 2
$220,000 4
$ 490,000 3
$ 540,000 2
$ 800,000 5
$ 975,000 2
The value of several houses on Mango street are displayed on the table. What is the median value of these houses?
$(_)
Bot GPT 3.5
answered
To find the median value of the houses on Mango street, we first need to list all the values in ascending order:
$150,000, $220,000, $220,000, $220,000, $220,000, $490,000, $490,000, $490,000, $540,000, $540,000, $800,000, $800,000, $800,000, $800,000, $800,000, $975,000, $975,000
There are a total of 18 houses, which is an even number. To find the median, we need to average the two middle values:
Median = ($490,000 + $540,000) / 2
Median = $515,000
Therefore, the median value of the houses on Mango street is $515,000.
anonymous
answered
Theo, Ara, Jose, and Dana all got 100 percent on their latest math test. Their scores on previous six tests are listed. Whose mean test score will increase the most?
A. Dana: 68, 74, 83, 80, 81, 81
B. Ara: 100, 98, 99, 97, 100, 100
C. Theo: 84, 88, 81, 85, 77, 76
D. Jose: 91, 93, 97, 96, 96, 96
Bot GPT 3.5
answered
We need to calculate the mean (average) test score for each student for the previous six tests and then compare the increase in the mean test score after receiving a perfect score on the latest test.
A. Dana:
Mean of previous six tests = (68 + 74 + 83 + 80 + 81 + 81) / 6 = 79.5
Increase in mean = 100 - 79.5 = 20.5
B. Ara:
Mean of previous six tests = (100 + 98 + 99 + 97 + 100 + 100) / 6 = 99.0
Increase in mean = 100 - 99.0 = 1.0
C. Theo:
Mean of previous six tests = (84 + 88 + 81 + 85 + 77 + 76) / 6 = 82.8
Increase in mean = 100 - 82.8 = 17.2
D. Jose:
Mean of previous six tests = (91 + 93 + 97 + 96 + 96 + 96) / 6 = 95.8
Increase in mean = 100 - 95.8 = 4.2
The student whose mean test score increased the most after getting 100 percent on the latest test is Dana with an increase of 20.5 points.
anonymous
answered
The stem-and-leaf plot shows the speeds of the fastest steel roller coasters in Europe. The table shows the speeds of the fastest steel roller coasters in North America.
Speeds of the the fastest steal roller coasters in Europe ( in miles per hour)
Stem leaf
7 4 5 5 5
8 0 0 3 4 8
9 9
11 1
key: 7 l 4= 74 miles per hour
Speeds of the fastest steel roller coasters in North America (in miles per hour)
Canada l 90 l 128 l 91
U.S. l 93 l 120 l 100
Mexico l 95 l 92 l 85
find the range of the spread of the fastest steel roller coasters on both continents.
The range of the speeds of the fastest steel roller coasters in Europe is (_) MPH. The range of the speeds of the fastest steal roller coasters in North America is (_) MPH.
Bot GPT 3.5
answered
To find the range of the spread of the speeds of the fastest steel roller coasters on both continents, we first need to calculate the range for each continent.
For Europe:
Fastest coaster speed in Europe = 114 (from the stem-and-leaf plot)
Slowest coaster speed in Europe = 74
Range in Europe = 114 - 74 = 40 MPH
For North America:
Fastest coaster speed in North America = 128
Slowest coaster speed in North America = 85
Range in North America = 128 - 85 = 43 MPH
Therefore, the range of the speeds of the fastest steel roller coasters in Europe is 40 MPH and the range of the speeds of the fastest steel roller coasters in North America is 43 MPH.