The cost of a university education has increased at a much faster rate than othe

Question

The cost of a university education has increased at a much faster rate than other living expenses 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 number of hours students work per week exceeds 20. Suppose a hypothesis test is done to test their belief. A random sample of 20 students was selected, and it was found that the sample mean is 20.4 and the standard deviation is 11.891. Then the correct value of the test statistic is O 1.729 O 0.1504 O 2.093 O 3.04

Explanation / Answer

1) from above std error of mean =std deviation/(n)1/2 =11.891/(20)1/2 =2.6589

therefore test statistic =(X-mean)/.std error =(20.4-20)/2.6589=0.1504

therfore option 0.1504 isa correct

2) true

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