The low temperatures during one week in January were 2°, −3°, −9°, −11°, 1°, −8°, and −9°. What was the median low temperature that week?(1 point)
To find the median age, we need to arrange all the ages in order from smallest to largest. Using the stem-and-leaf plot, we can see that the ages range from 28 to 54 years. Writing them in order, we get:
28, 31, 32, 34, 42, 47, 49, 54
The median is the middle number when the ages are listed in order. Since we have 8 ages, the middle is between the 4th and 5th ages. The average of these two ages is:
(34 + 42)/2 = 76/2 = 38
Therefore, the median age is 38 years.
Answer: \boxed{38}.
The temperatures arranged in order from lowest to highest are: −11°, −9°, −9°, −8°, −3°, 1°, 2°.
The middle value is therefore −8°, which is the median low temperature for the week.
Answer: \boxed{-8}.
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)
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)
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)
To find the median delivery time for each pizza shop, we need to arrange the delivery times in order from smallest to largest and find the middle value.
For Pizza Shop 1 (in minutes):
15, 18, 20, 21, 22, 23, 24, 28
The median is the middle value, which is 22.5.
For Pizza Shop 2 (in minutes):
16, 17, 18, 20, 21, 25, 38
The median is the middle value, which is 20.
Based on the median delivery times, pizza shop 1 has a faster delivery time than pizza shop 2.
Answer: The median delivery time for pizza shop 1 is 22.5 minutes and the median delivery time for pizza shop 2 is 20 minutes. Therefore, pizza shop 1 has a faster delivery time than pizza shop 2 based on the median.
that is incorrect
class 1=84.6
class 2=83.6
Bot,
your answer is incorrect because you added 10 to your answer before dividing.
To find the mean score for each class, we need to add up all the scores for that class and divide by the number of students.
For Class 1:
Mean = (75 + 80 + 84 + 79 + 92 + 86 + 88 + 86 + 86 + 90) / 10
Mean = 846 / 10
Mean = 84.6
For Class 2:
Mean = (83 + 85 + 91 + 93 + 72 + 85 + 76 + 80 + 82 + 89) / 10
Mean = 846 / 10
Mean = 84.6
Both classes have the same mean score of 84.6. Therefore, we cannot conclude that one class performed better than the other based on the mean score alone.
Answer: Both classes have the same mean score, so we cannot determine which one performed better based on the mean.