All the students in a school took a physical fitness test. Three students want to estimate...

 

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All the students in a school took a physical fitness test. Three students want to estimate the mean score for the school. To do this, they each randomly chose 5 schoolmates and recorded their scores. The samples are shown in the table. (a) Fill in the sample means in the table. Do not round your answers. Sample Score (out of 100) Sample mean 1 60, 20, 50, 60, 50 40, 40, 60, 70, 50 20, 40, 60, 70, 80 (b) Use the table to calculate the range of the sample means. Range of sample means: I (c) The students are going to use the sample means to estimate the mean score for the school. Select all the true statements below. be a worse estimate than a single sample mean. The mean of the sample means will tend A single sample mean will tend to be a worse estimate than the mean of the sample means. The closer the range of the sample means is to 0, the more confident they can be in their estimate. The farther the range of the sample means is from 0, the more confident they can be in their estimate. All the students in a school took a physical fitness test. Three students want to estimate the mean score for the school. To do this, they each randomly chose 5 schoolmates and recorded their scores. The samples are shown in the table. (a) Fill in the sample means in the table. Do not round your answers. Sample Score (out of 100) Sample mean 1 60, 20, 50, 60, 50 40, 40, 60, 70, 50 20, 40, 60, 70, 80 (b) Use the table to calculate the range of the sample means. Range of sample means: I (c) The students are going to use the sample means to estimate the mean score for the school. Select all the true statements below. be a worse estimate than a single sample mean. The mean of the sample means will tend A single sample mean will tend to be a worse estimate than the mean of the sample means. The closer the range of the sample means is to 0, the more confident they can be in their estimate. The farther the range of the sample means is from 0, the more confident they can be in their estimate.