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In a national survey conducted by the Centers for Disease

In a national survey conducted by the Centers for Disease Control to determine health-risk behaviors among college students, college students were asked, “How often do you wear a seat belt when riding in a car driven by someone else?” The frequencies were as follows:

Response ...... Frequency

Never ......... 125

Rarely ......... 324

Sometimes ....... 552

Most of the time .... 1257

Always ......... 2518

(a) Construct a relative frequency distribution.

(b) What percentage of respondents answered “Always”?

(c) What percentage of respondents answered “Never” or “Rarely”?

(d) Construct a frequency bar graph.

(e) Construct a relative frequency bar graph.

(f ) Construct a pie chart.

(g) Suppose that a representative from the Centers for Disease Control says, “52.7% of all college students always wear a seat belt.” Is this a descriptive or inferential statement?

Response ...... Frequency

Never ......... 125

Rarely ......... 324

Sometimes ....... 552

Most of the time .... 1257

Always ......... 2518

(a) Construct a relative frequency distribution.

(b) What percentage of respondents answered “Always”?

(c) What percentage of respondents answered “Never” or “Rarely”?

(d) Construct a frequency bar graph.

(e) Construct a relative frequency bar graph.

(f ) Construct a pie chart.

(g) Suppose that a representative from the Centers for Disease Control says, “52.7% of all college students always wear a seat belt.” Is this a descriptive or inferential statement?

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