The cost of a college education has increased at a much

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Reference no: EM13602058

The cost of a college education has increased at a much faster rate than costs in general over the past twenty years. In order to compensate for this, many students work part- or full-time in addition to attending classes. At one university, it is believed that the average hours students work per week exceeds 20. To test this at a significance level of 0.05, a random sample of n = 20 students was selected and the following values were observed:

26	15	10	40
10	20	30	36
40	0	5	10
20	32	16	12
40	36	10	0

Based on these sample data, the critical value expressed in hours:

is approximately equal to 25.0 hours.

is approximately equal to 25.26 hours.

is approximately 22 hours.

cannot be determined without knowing the population standard deviation.

Reference no: EM13602058

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