Question

Homework check.

See attachment.

Answer 1

@phi

Answer 2

@amistre64

Answer 3

for (a), the hypothesis is mu has decreased.
You chose mu has either decreased or increased. that is not the same thing

Answer 4

so A?

Answer 5

they guess is mean price has decreased below 243,707
if mu has decreased to less than 243.707 how would you write it ?
mu < 243,707

Answer 6

ok C it is then. what about (b) & (c)?

Answer 7

yes, (a) is C
(b) and (c) look correct.