The responses of a sample of 1000 adults who were asked what type of corrective

Question

The responses of a sample of 1000 adults who were asked what type of corrective lenses they wore are shown in the table at the right. Find the mean, median, and mode of the data, if possible. If any measure cannot be found, explain why Type of lenses | Contacts Eyeglasses Contacts and eyeglasses None Frequency, f 620 160 40 180 Find the mean. Select the correct choice below and, if necessary, fill in the answer box to complete your choice 0 A. The mean is B. ° C. D. (Type an integer or decimal rounded to one decimal place as needed.) The mean cannot be calculated because the data are at the nominal level of measurement. The mean cannot be calculated because the sample size is too small The mean cannot be calculated because there is an even number of data values Does the mean represent the center of the data? 0 A. O B. ° C. 0 D. 0 E. The mean represents the center The mean does not represent the center because it is the smallest data value The mean does not represent the center because it is the largest data value The mean does not represent the center because it is not a data value The data set does not have a mean

Explanation / Answer

1. B. mean cannot be calculated because the data are at nominal level of measurement

2. E. The dataset does not have a mean

3. B. median cannot be calculated because the data are at nominal level of measurement

4. E. The dataset does not have a median

5. Contacts

6. Yes, the mode represents a typical data entry

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