Interactive practice questions
The weight (in kilograms) of two groups, $A$A and $B$B, were recorded in a stem plot as shown.
| Group $A$A | Group $B$B | ||||||||||||
| Stem | Leaf | Stem | Leaf | ||||||||||
| $6$6 | $0$0 | $3$3 | $5$5 | $6$6 | $7$7 | $5$5 | $0$0 | $1$1 | $1$1 | $2$2 | $3$3 | ||
| $7$7 | $0$0 | $1$1 | $2$2 | $2$2 | $2$2 | $6$6 | $0$0 | $0$0 | $2$2 | $3$3 | |||
| $7$7 | $0$0 | ||||||||||||
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What is the mean weight of group $A$A?
What is the mean weight of group $B$B?
Which group contains individuals that are generally heavier?
Group $A$A
Group $B$B
Calculate the population standard deviation for group $A$A.
Round your answer to one decimal place.
Calculate the population standard deviation for group $B$B.
Round your answer to one decimal place.
Which group had more consistent weights?
Group $A$A
Group $B$B
The Cancer Council surveyed $60$60 random people, asking them approximately how many hours they spent in the sun in the last month. The responders were split up into two groups, tourists and local residents.
10 participants had their pulse measured before and after exercise with results shown in the stem and leaf plot below.
The stem and leaf plots show the length (in minutes) of a random sample of phone calls made by Elizabeth and Kathleen.