Question

ryan’s classmates each calculated the mean time it takes to get ready for school reported by a sample of 100 participants. ryan created this histogram of the sample means. how many samples reported an average time to get ready between 0 min and 10 min? suggest a reasonable interval to estimate the population parameter.

of the 50 samples, 2 reported an average time to get ready between 0 min and 10 min
(type a whole number.)
a reasonable interval to estimate the population parameter is
options: 0-60, 21-30, 11-50, 31-50, 11-30

Explanation:

Step1: Analyze the first part

The histogram shows the number of samples for each time interval. For the 0 - 10 min interval, we look at the bar's height. From the given, it's 2, so 2 samples reported between 0 - 10 min.

Step2: Analyze the interval estimation

To estimate the population parameter (mean time), we look for the interval with the most samples (or a central, representative interval). The interval 11 - 30 likely covers the peak of the histogram (since the bars for 11 - 20, 21 - 30 are tall), so it's a reasonable interval.

Answer:

First part: 2
Second part: 11 - 30