The mean score for Class 1 is
a
. The mean score for Class 2 is
a
. Based on the mean, Class
generally performed better on the math test.
Since the mean score for Class 1 is "a" and the mean score for Class 2 is also "a", we can conclude that both classes had the same average score on the math test. Therefore, we cannot determine which class generally performed better based on the mean score alone.
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
To find the mean score of each sample, we first need to calculate the total score for each class and then divide by the number of students in that class.
For Class 1:
Total score = 75 + 80 + 84 + 79 + 92 + 86 + 88 + 86 + 86 + 90 = 850
Number of students = 10
Mean score for Class 1 = Total score / Number of students = 850 / 10 = 85
For Class 2:
Total score = 83 + 85 + 91 + 93 + 72 + 85 + 76 + 80 + 82 + 89 = 846
Number of students = 10
Mean score for Class 2 = Total score / Number of students = 846 / 10 = 84.6
Based on the mean score, Class 1 generally performed better as it has a higher mean score of 85 compared to Class 2 with a mean score of 84.6.
wrong
I apologize for the error in my previous response. Let's recalculate the mean score for each class using the given data.
For Class 1:
Total score = 75 + 80 + 84 + 79 + 92 + 86 + 88 + 86 + 86 + 90 = 850
Number of students = 10
Mean score for Class 1 = Total score / Number of students = 850 / 10 = 85
For Class 2:
Total score = 83 + 85 + 91 + 93 + 72 + 85 + 76 + 80 + 82 + 89 = 846
Number of students = 10
Mean score for Class 2 = Total score / Number of students = 846 / 10 = 84.6
After recalculating the mean scores, we find that Class 1 has a mean score of 85 and Class 2 has a mean score of 84.6. Therefore, based on the mean scores, 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
minutes. The median delivery time of Pizza Shop 2 is
minutes. Based on the median, Pizza Shop
has a faster delivery time.
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To find the median delivery time for each pizza shop, we first need to arrange the delivery times in each sample in ascending order:
For Pizza Shop 1: 15, 18, 20, 21, 22, 23, 24, 28
Median delivery time for Pizza Shop 1: (21 + 22) / 2 = 21.5 minutes
For Pizza Shop 2: 16, 17, 18, 20, 20, 20, 25, 38
Median delivery time for Pizza Shop 2: (20 + 20) / 2 = 20 minutes
Based on the median delivery times, Pizza Shop 2 has the fastest delivery time with a median delivery time of 20 minutes compared to Pizza Shop 1 with a median delivery time of 21.5 minutes.