Question

because clark, a junior at metropolis high, sleeps in math class, students were asked to develop a survey to determine the average number of hours high school students sleep on a daily basis. the survey results are shown in the histogram to the right. how many more hours does the average junior boy sleep than the average junior girl? choose a, b, c, or d a 7.5 hours b 7.1 hours c 4.0 hours d 0.4 hours monday warm up

Explanation:

Step1: Identify average sleep - hours for junior boys

From the bar - chart, the average number of hours junior boys sleep is 7.4 hours.

Step2: Identify average sleep - hours for junior girls

From the bar - chart, the average number of hours junior girls sleep is 7.0 hours.

Step3: Calculate the difference

Subtract the average sleep - hours of junior girls from that of junior boys: \(7.4−7.0 = 0.4\) hours.

Answer:

D. 0.4 hours