Stat Question 3

#1
6. It is believed that the amount of time adults spend watching national and local news programs on television each week is less than 26 minutes on average. A sample of 15 adults was selected at random with the following times spent watching news on television during the week.
46 12 0 56 35
40 20 10 0 14
13 20 16 40 11
Based on these data, which of the following statements is true?
a. The critical value for the test conducted at a 0.05 level of significance is t = -1.7613
b. The belief about the mean being less than 26 minutes is not supported by the sample data.
c. The test statistic is calculated to be approximately t = -0.863
d. All of the above are true.