If you wish to test the claim that the mean test core of the population is higher than 75, the appropriate null hypothes

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If you wish to test the claim that the mean test core of the
population is higher than
75, the appropriate null hypothesis and its alternative hypothesis
are
(a) H0 : μ ≤75 vs μ > 75
(b) H0 : ̄X = 75 vs ̄X > 75
(c) H0 : μ ≥75 vs μ < 75
(d) H0 : μ = 75 vs μ 6= 75
(iv) To test the equality of two proportions, which test would
you use?
(a) The t test
(b) The z test
(c) The χ2 test
(d) None of the above.
(v) The strength of the linear relationship between two
quantitative variables x and y is
determined by the value of
(a) r
(b) a (the y-intercept)
(c) x
(d) s est.