IMathAS-libretexts

A hypothesis test was conducted to investigate whether the population mean age of college students at Osler city is different from 21.

a) This is a

two-tailed test.
right-tailed test.

left-tailed test.
half-way test.

b) Select a correct formulation of the appropriate hypotheses:

$\displaystyle {H}_{{0}}:\mu\ge{21}$
$\displaystyle {H}_{{1}}:\mu<{21}$
$\displaystyle {H}_{{0}}:\mu<{21}$
$\displaystyle {H}_{{1}}:\mu\ge{21}$

$\displaystyle {H}_{{0}}:\mu\le{21}$
$\displaystyle {H}_{{1}}:\mu>{21}$
$\displaystyle {H}_{{0}}:\mu>{21}$
$\displaystyle {H}_{{1}}:\mu\le{21}$

$\displaystyle {H}_{{0}}:\mu={21}$
$\displaystyle {H}_{{1}}:\mu≠{21}$
$\displaystyle {H}_{{0}}:\mu≠{21}$
$\displaystyle {H}_{{1}}:\mu={21}$