In some literature, a coach company claims that the median journey time for its services between Bristol and Aberdeen is

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In some literature, a coach company claims that the median
journey time for its services between Bristol and Aberdeen is 13
hours. A couple of regular passengers are interested in whether or
not this claim is correct. To test this they timed how long the
journey took on some of the occasions they made the trip. For a
total of 24 trips between Bristol and Aberdeen, they found that 14
of the trips were shorter than 13 hours, 7 of the trips took longer
than 13 hours and 3 of the trips took exactly 13 hours. Suppose a
sign test is carried out to test the hypothesis that the median
journey time is 13 hours. Select the TWO statements which are
TRUE.
Select one or more:
The test statistic is 7.
The test statistic is 21.
The sample size that should be used in the test is 3.
The test statistic is 14.
The test statistic is 5.
The test statistic is 6.
The sample size that should be used in the test is 24.
The test statistic is 24.
The sample size that should be used in the test is 21.