The temperatures (in ° F) in a city on randomly selected days during the summer are 89, 85, 90, 87, 86, 91, 88, and 89. What is the mean temperature? Round your answer to one decimal place.(1 point)
The mean temperature is calculated by adding up all the temperatures and then dividing by the total number of temperatures.
89 + 85 + 90 + 87 + 86 + 91 + 88 + 89 = 705
Now, divide by the total number of temperatures (8):
705 / 8 = 88.1
Therefore, the mean temperature is 88.1°F.
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 low temperature, we first need to arrange the temperatures in ascending order:
-11°, -9°, -9°, -8°, -3°, 1°, 2°
Since there are 7 temperatures in total, the median will be the fourth temperature when arranged in order. In this case, the median temperature is -8°F.
Therefore, the median low temperature that week was -8°F.
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
To find the median age, we need to first list out all the ages in order. From the stem-and-leaf plot:
- 28
- 31, 32, 34
- 42, 47, 49
- 54
Now, we count the total number of ages which is 8. Since there is an even number of ages, the median will be the average of the middle two ages when the ages are listed in order.
The middle two ages are the 4th and 5th ages which are 32 and 34.
Calculating the average:
(32 + 34) / 2 = 33
Therefore, the median age is 33 years.
wrong
Apologies for the mistake. Let's correct the calculation:
Given the ages from the stem-and-leaf plot:
28, 31, 32, 34, 42, 47, 49, 54
Since there are 8 ages in total, we need to find the middle age when the ages are listed in order.
The median will be the 4th age out of the 8 when listed in order, which is 34.
Therefore, the correct median age is 34 years.
still wrong
Let's correct our approach to finding the median age from the given stem-and-leaf plot:
Given the stem-and-leaf plot:
Stem Leaf
2 8
3 1 2 4
4 2 7 9
5 4
The ages listed in sorted order are: 28, 31, 32, 34, 42, 47, 49, 54.
There are a total of 8 ages, an even number. To find the median age, we need to take the average of the two middle values when the ages are sorted.
The two middle values are the 4th (34) and 5th (42) ages, so the median age is:
(34 + 42) / 2 = 38
Therefore, the median age is 38 years.
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)