The ages of two groups of karate students are shown in the following dot plots:
A dot plot shows Age in years on the horizontal axis. For Group A, there are 2 dots on 4, 5 dots on 5, 3 dots on 7, 4 dots on 8, 2 dots on 9, 2 dots on 11, and 1 dot on 14. For Group B, there is 1 dot on 7, 2 dots on 8, 1 dot on 9, 1 dot on 11, 1 dot on 16, 2 dots on 19, 2 dots on 20, 2 dots on 21, and 1 dot on 26.
The mean absolute deviation (MAD) for group A is 2.07 and the MAD for group B is 5.51. Which of the following observations can be made using these data? (1 point)
Group A has greater variability in the data.
Group A has less variability in the data.
Group B has a lower range.
Group B has a lower mean.
5 answers
Group A has less variability in the data.
The dot plot below shows the amount of time two random groups of students took to brush their teeth:
A dot plot shows Tooth Brushing Time in seconds on the horizontal axis. For Group R, there is 1 dot on 45, 2 dots on 50, 1 dot on 55, 2 dots on 60, 1 dot on 65, 1 dot on 70, 1 dot on 75, 1 dot on 80, 1 dot on 85, 2 dots on 90, 1 dot on 95, 2 dots on 100, 1 dot on 105, 2 dots on 110, 1 dot on 115, and 2 dots on 120. For Group S, there is 1 dot on 50, 1 dot on 55, 2 dots on 60, 2 dots on 70, 1 dot on 80, 2 dots on 90, 1 dot on 95, 1 dot on 100, 1 dot on 105, 2 dots on 110, 1 dot on 115, and 1 dot on 120.
Based on visual inspection of the dot plots, which of the following groups, if any, shows a greater average time required to brush their teeth? (1 point)
Group R
Group S
Both groups show about the same average time.
No conclusion about average time can be made from the data.
A dot plot shows Tooth Brushing Time in seconds on the horizontal axis. For Group R, there is 1 dot on 45, 2 dots on 50, 1 dot on 55, 2 dots on 60, 1 dot on 65, 1 dot on 70, 1 dot on 75, 1 dot on 80, 1 dot on 85, 2 dots on 90, 1 dot on 95, 2 dots on 100, 1 dot on 105, 2 dots on 110, 1 dot on 115, and 2 dots on 120. For Group S, there is 1 dot on 50, 1 dot on 55, 2 dots on 60, 2 dots on 70, 1 dot on 80, 2 dots on 90, 1 dot on 95, 1 dot on 100, 1 dot on 105, 2 dots on 110, 1 dot on 115, and 1 dot on 120.
Based on visual inspection of the dot plots, which of the following groups, if any, shows a greater average time required to brush their teeth? (1 point)
Group R
Group S
Both groups show about the same average time.
No conclusion about average time can be made from the data.
Based on visual inspection of the dot plots, no conclusion about average time can be made from the data.
The price of some jewelry sets in a store are shown below:
Store Price
A $110,000
B $100,000
C $1,110,000
D $130,000
E $120,000
Based on the data, should the mean or the median be used to make an inference about the price of the jewelry sets in the store? (1 point)
Mean, because it is in the center of the data
Median, because it is in the center of the data
Median, because there is an outlier that affects the mean
Mean, because there are no outliers that affect the mean
Store Price
A $110,000
B $100,000
C $1,110,000
D $130,000
E $120,000
Based on the data, should the mean or the median be used to make an inference about the price of the jewelry sets in the store? (1 point)
Mean, because it is in the center of the data
Median, because it is in the center of the data
Median, because there is an outlier that affects the mean
Mean, because there are no outliers that affect the mean
Median should be used to make an inference about the price of the jewelry sets in the store, because there is an outlier (store C with a price of $1,110,000) that affects the mean.
1 answer