Question
Mr. Jenning's physics class built different-shaped parachutes to see which shapes were more effective. The students tested the parachutes by dropping them from a height
Mr. Jenning's physics class built different-shaped parachutes to see which shapes were more effective. The students tested the parachutes by dropping them from a height of 25 feet and timing the fall. They calculated the summary below:
Mean | Std Dev | Min | Q1 | Median | Q3 | Max |
---|---|---|---|---|---|---|
4.2 secs | 0.5 sec | 2.6 secs | 3.4 secs | 4.0 secs | 5.7 secs | 6.8 secs |
The students want to see what happens to their times when they drop the parachutes from 35 feet. They find that every drop is increased by 1.5 seconds. Find the new mean and standard deviation.
Which of the following variables can be classified as quantitative?
- Street name
- Zip code
- Population
- Number of children in household
The number of bagels sold daily for two bakeries is shown in the following table:
Bakery A | Bakery B |
---|---|
45 | 48 |
52 | 42 |
51 | 11 |
48 | 45 |
57 | 57 |
30 | 10 |
55 | 43 |
46 | 46 |
Based on these data, is it better to describe the centers of distribution in terms of the mean or the median? Why? Select the correct answer below.
Mean, because there are no outliers to affect the data
Mean, because the distribution is symmetric for both bakeries
Median, because the distributions for both bakeries are not symmetric
Median, because the presence of an outlier affects the data
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