The amount that two groups of students spent on snacks in one day is shown in the dot plots below.
1 answer:
Answer:
1. The mean for Group A is less than the mean for Group B
2. The median for Group A is less than the median for Group B.
3. The mode for Group A is less than the mode for Group B.
Step-by-step explanation:
1. To find the mean for Group A, you use the formula: Total sum/Total frequency.
To find the total sum, you multiply the frequency(how many times the given number is repeated) with the given numbers.
0 × 0 = 0
1 × 5 = 5
2 × 4 = 8
3 × 1 = 3
4 × 0 = 0
5 × 0 = 0
Total Sum: 5 + 8 + 3 = 16
Total frequency: 5 + 4+ 1 = 10
= 1.6
To find the mean for Group B, you repeat everything above.
0 × 0 = 0
1 × 3 = 3
2 × 2 = 4
3 × 4 = 12
4 × 0 = 0
5 × 1 = 5
Total Sum: 3 + 4 + 12 + 5 = 24
Total frequency: 3 + 2 + 4 + 1 = 10
= 2.4
2. I can't explain it but I'm certain that it is correct.
3. The most repeated number for Group A is 1, it is repeated 5 times, while the most repeated number in Group B is 3, it is repeated 4 times.
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Answer is (1) 160 km in 2 hours and
(2) 16 miles in 12 minutes.
Step by step.
80 km / 1 hour = x km /2 hours
Cross multiply =
x = 160
The second one requires a little more math. Because we are looking at how far in minutes, we change the rate of 80km in 1 hour to 80 km in 60 minutes.
80 km / 60 = x / 12
Cross multiply
12x = 960
Solve for x by dividing both sides by 12
X = 16
I did the math on a print screen to explain the cross multiply.
(2) 16 miles in 12 minutes.
Step by step.
80 km / 1 hour = x km /2 hours
Cross multiply =
x = 160
The second one requires a little more math. Because we are looking at how far in minutes, we change the rate of 80km in 1 hour to 80 km in 60 minutes.
80 km / 60 = x / 12
Cross multiply
12x = 960
Solve for x by dividing both sides by 12
X = 16
I did the math on a print screen to explain the cross multiply.