the librarian at the public library counted the number of books on each shelf. books per shelf stem leaf 4 2…

the librarian at the public library counted the number of books on each shelf. books per shelf stem leaf 4 2 3 4 7 8 5 0 5 7 6 1 4 8 8 7 0 0 8 8 8 9 9 8 2 6 8 how many shelves have at least 50 books but fewer than 90 books? shelves

Answer

Explanation:

Step1: Identify relevant data

We need data from 50 - 89.

Step2: Count data in 50 - 59

In the stem - and - leaf plot, for stem 5, there are 3 data points (50, 55, 57).

Step3: Count data in 60 - 69

For stem 6, there are 3 data points (61, 64, 68).

Step4: Count data in 70 - 79

For stem 7, there are 7 data points (70, 70, 78, 78, 78, 79, 79).

Step5: Count data in 80 - 89

For stem 8, there are 3 data points (82, 86, 88).

Step6: Sum up the counts

$3 + 3+7 + 3=16$.