Question

In a survey commission by the Maxtor Corporation, U.S. comput users were asked how often they backed up their computer's hard drive. The following frequency distribution presents the results. Reponse Frequency More than once a month 338 Once every 1-3 months 424 Once every 4-6 months 212 Once every 7-11 months 127 Once per year or less 311 Never 620 Complete the following relative frequency distribution. Round all relative frequencies to 4 decimal places. Reponse Relative Frequency More than once a month Once every 1-3 months Once every 4-6 months Once every 7-11 months Once per year or less Never True or False: a. More than 35% of the survey respondents never back up their data. b. More than 10% of the survey respondents back up their data more than one a month.

Answer 1

The relative frequecny is obtained by dividing the respective frequency by the total of all the frequencies

Here total is 2032

Response	Frequency	Relative Frequency
More than once in a month	338	0.1663
Once every 1-3 months	424	0.2087
Once every 4-6 months	212	0.1043
Once every 7-11 months	127	0.0625
Once per year or less	311	0.1531
Never	620	0.3051

So the relative frequency table is as follows

Response	Relative Frequency
More than once in a month	0.1663
Once every 1-3 months	0.2087
Once every 4-6 months	0.1043
Once every 7-11 months	0.0625
Once per year or less	0.1531
Never	0.3051

The relative frequencies can also be mentioned in %

Response	Relative Frequency
More than once in a month	16.63%
Once every 1-3 months	20.87%
Once every 4-6 months	10.43%
Once every 7-11 months	6.25%
Once per year or less	15.31%
Never	30.51%

Question (a)

30.51% of the respondents never back up the data

So Asnwer is False

Question (b)

16.63% of the respondents back up the data once in a month

So Asnwer is True