Reading and Analyzing Histograms

What is the primary purpose of using histograms in the video?

• To compare different hospitals

• To analyze survey data about nurses' years of experience

• To study medication effects

• To schedule nurse shifts

How many classes are represented in the histogram?

• 8

• 7

• 6

• 5

What is the class width of each interval in the histogram?

• 5 years

• 10 years

• 15 years

• 20 years

Which range of years does the first class in the histogram cover?

• 1-10 years

• 0-10 years

• 1-9 years

• 0-9 years

What does the upper limit of the first class represent?

• None of the above

• The average value

• The minimum value included

• The maximum value included

What is the significance of not including the upper limit value in each class?

• To simplify calculations

• To decrease the total number of classes

• To increase the class width

• To avoid duplication of values in classes

How many nurses were surveyed according to the histogram?

• 135

• 115

• 105

• 125

How is the total number of nurses calculated from the histogram?

• By multiplying the class frequencies

• By summing the class frequencies

• By averaging the class frequencies

• By dividing the class frequencies

What percentage of nurses have worked more than 30 years?

• 25.3%

• 24.3%

• 23.3%

• 22.3%

Is the data distribution from the histogram approximately normal?

• No, but very close to normal

• Yes, approximately normal

• No, not normal at all

• Yes, perfectly normal