Question

ndom survey asked two samples of 100 high school dents how much time they spend on homework each nt.

	0-30 min	31-60 min	61-90 min
sample 2	41	36	23

which inference is true?

• more students spend 0-30 minutes on homework than spend 31-60 minutes.
• more students spend 31-60 minutes on homework than spend 0-30 minutes.
• about the same number of students spend 0-30 minutes on homework as spend 31-60 minutes.
• more students spend 61-90 minutes on homework than spend 0-30 minutes.

Explanation:

Step1: Calculate total 0-30 min students

$38 + 41 = 79$

Step2: Calculate total 31-60 min students

$42 + 36 = 78$

Step3: Calculate total 61-90 min students

$20 + 23 = 43$

Step4: Compare group totals

Compare 79, 78, and 43 to evaluate options.

Answer:

About the same number of students spend 0-30 minutes on homework as spend 31-60 minutes.