Industry: The opposite stem-and-leaf plot displays the average battery lives of 25 smartphones:
a) Draw the box plot of this data.
MR/Nasef.N
b) How many smartphones have an average battery life more than 17 hours?
\[ \boxed{12} \text{ smartphones} \]
MR/Nasef.N
c) Calculate the percentage of smartphones whose average battery life is less than 12 hours.
\[ \frac{5}{25} \times 100\% = \boxed{20\%} \]
d) Multiple choice: What is the interquartile range of this data?
No comments:
Post a Comment