The median age is the middle value when the data is ordered from least to greatest.
From the stem-and-leaf plot, the ages are: 28, 31, 32, 34, 42, 47, 49, 54.
Since there are 8 ages in total, the median will be the average of the 4th and 5th ages when ordered: 34 and 42.
(34 + 42) / 2 = 38
So, the median age is 38 years.
The stem-and-leaf plot shows the ages of a group of friends. Find the median age.
Stem Leaf
2 8
3 1 2 4
4 2 7 9
5 4
Key: 2|8=28 years
(1 point)
___years
7 answers
Here are the math test scores of 10 randomly selected students from Class 1 and Class 2.
Class 1: 75 80 84 79 92 86 88 86 86 90
Class 2: 83 85 91 93 72 85 76 80 82 89
Find the mean score of each sample. Based on the mean, which class generally performed better on the math test?
(2 points)
The mean score for Class 1 is__. The mean score for Class 2 is___. Based on the mean, Class___ generally performed better on the math test.
Class 1: 75 80 84 79 92 86 88 86 86 90
Class 2: 83 85 91 93 72 85 76 80 82 89
Find the mean score of each sample. Based on the mean, which class generally performed better on the math test?
(2 points)
The mean score for Class 1 is__. The mean score for Class 2 is___. Based on the mean, Class___ generally performed better on the math test.
To find the mean score of each sample, we need to add up all the scores in each class and then divide by the number of students.
For Class 1:
(75 + 80 + 84 + 79 + 92 + 86 + 88 + 86 + 86 + 90) / 10 = 846 / 10 = 84.6
So, the mean score for Class 1 is 84.6.
For Class 2:
(83 + 85 + 91 + 93 + 72 + 85 + 76 + 80 + 82 + 89) / 10 = 846 / 10 = 84.6
So, the mean score for Class 2 is also 84.6.
Based on the mean score, both Class 1 and Class 2 performed equally well on the math test.
For Class 1:
(75 + 80 + 84 + 79 + 92 + 86 + 88 + 86 + 86 + 90) / 10 = 846 / 10 = 84.6
So, the mean score for Class 1 is 84.6.
For Class 2:
(83 + 85 + 91 + 93 + 72 + 85 + 76 + 80 + 82 + 89) / 10 = 846 / 10 = 84.6
So, the mean score for Class 2 is also 84.6.
Based on the mean score, both Class 1 and Class 2 performed equally well on the math test.
Here are the math test scores of 10 randomly selected students from Class 1 and Class 2.
Class 1: 75 80 84 79 92 86 88 86 86 90
Class 2: 83 85 91 93 72 85 76 80 82 89
Find the mean score of each sample. Based on the mean, which class generally performed better on the math test?
(2 points)
The mean score for Class 1 is__. The mean score for Class 2 is___. Based on the mean, Class___ generally performed better on the math test.
Class 1: 75 80 84 79 92 86 88 86 86 90
Class 2: 83 85 91 93 72 85 76 80 82 89
Find the mean score of each sample. Based on the mean, which class generally performed better on the math test?
(2 points)
The mean score for Class 1 is__. The mean score for Class 2 is___. Based on the mean, Class___ generally performed better on the math test.
To find the mean score of each sample, we need to add up all the scores in each class and then divide by the number of students.
For Class 1:
Mean score for Class 1 = (75 + 80 + 84 + 79 + 92 + 86 + 88 + 86 + 86 + 90) / 10
Mean score for Class 1 = 856 / 10
Mean score for Class 1 = 85.6
So, the mean score for Class 1 is 85.6.
For Class 2:
Mean score for Class 2 = (83 + 85 + 91 + 93 + 72 + 85 + 76 + 80 + 82 + 89) / 10
Mean score for Class 2 = 846 / 10
Mean score for Class 2 = 84.6
So, the mean score for Class 2 is 84.6.
Since the mean score for Class 1 (85.6) is higher than the mean score for Class 2 (84.6), Class 1 generally performed better on the math test.
For Class 1:
Mean score for Class 1 = (75 + 80 + 84 + 79 + 92 + 86 + 88 + 86 + 86 + 90) / 10
Mean score for Class 1 = 856 / 10
Mean score for Class 1 = 85.6
So, the mean score for Class 1 is 85.6.
For Class 2:
Mean score for Class 2 = (83 + 85 + 91 + 93 + 72 + 85 + 76 + 80 + 82 + 89) / 10
Mean score for Class 2 = 846 / 10
Mean score for Class 2 = 84.6
So, the mean score for Class 2 is 84.6.
Since the mean score for Class 1 (85.6) is higher than the mean score for Class 2 (84.6), Class 1 generally performed better on the math test.
Kat and Joshua want to know which pizza shop has the fastest delivery time. Kat took a random sample of 8 delivery times from pizza shop 1 over a period of six months. Joshua did the same for pizza shop 2. The delivery times (in minutes) for each pizza shop are shown in the following table.
Pizza Shop 1 Pizza Shop 2
18 20
23 17
15 16
22 38
21 21
24 20
28 18
20 25
Find the median delivery time for each pizza shop. Based on the median, which pizza shop has the fastest delivery time?
(2 points)
The median delivery time of Pizza Shop 1 is
17.1
minutes. The median delivery time of Pizza Shop 2 is
minutes. Based on the median, Pizza Shop
has a faster delivery time.
Pizza Shop 1 Pizza Shop 2
18 20
23 17
15 16
22 38
21 21
24 20
28 18
20 25
Find the median delivery time for each pizza shop. Based on the median, which pizza shop has the fastest delivery time?
(2 points)
The median delivery time of Pizza Shop 1 is
17.1
minutes. The median delivery time of Pizza Shop 2 is
minutes. Based on the median, Pizza Shop
has a faster delivery time.
To find the median delivery time for each pizza shop, we need to first arrange the delivery times in ascending order.
For Pizza Shop 1:
15, 18, 20, 21, 22, 23, 24, 28
Since there are 8 values, the median will be the average of the 4th and 5th value.
Median for Pizza Shop 1 = (21 + 22) / 2 = 21.5
For Pizza Shop 2:
16, 17, 18, 20, 20, 25, 38
Since there are 7 values, the median is the middle value which is the 4th value.
Median for Pizza Shop 2 = 20
Therefore, the median delivery time for Pizza Shop 1 is 21.5 minutes and the median delivery time for Pizza Shop 2 is 20 minutes. Based on the median, Pizza Shop 1 has a faster delivery time.
For Pizza Shop 1:
15, 18, 20, 21, 22, 23, 24, 28
Since there are 8 values, the median will be the average of the 4th and 5th value.
Median for Pizza Shop 1 = (21 + 22) / 2 = 21.5
For Pizza Shop 2:
16, 17, 18, 20, 20, 25, 38
Since there are 7 values, the median is the middle value which is the 4th value.
Median for Pizza Shop 2 = 20
Therefore, the median delivery time for Pizza Shop 1 is 21.5 minutes and the median delivery time for Pizza Shop 2 is 20 minutes. Based on the median, Pizza Shop 1 has a faster delivery time.