1) In right-tailed test at α = .05 we would comfortably reject null hypothesis. Comfortably accept null hypothesis. Feel uncomfortable with either decision (too close)
2) If p-value for this test is 0.025, this p-value means
Probability of getting a sample mean number of shark attacks larger than 36.33, suppose null is true, is quite small.
Probability of getting a sample mean number of shark attacks larger than 36.33, suppose null is true, is quite large.
Probability of getting a sample mean number of shark attacks larger than 54.5, suppose null is true, is quite small.
Probability of getting a sample mean number of shark attacks larger than 54.5, suppose null is true, is quite large
Dangerous for those who use water for recreation is same as to test whether unprovoked shark attacks is larger for these years than 36.66 (mean number of unprovoked shark attacks per year in the USA).
1) Determine critical value if alpha = 0.05?
i) z.05 = 1.645
ii) z.05 = 1.960
iii) t.05 = 6.314
iv) t.05 = 12.706