Select the correct statement a left-tailed hypothesis test is significant at the 0.05 level if the standard score of the sample
mean is less than or equal to z=-1.645
a left-tailed hypothesis test is significant at the 0.05 level if the standard score of the sample
mean is higher than or equal to z=-1.645
a left-tailed hypothesis test is not significant at the 0.05 level if the standard score of the sample
mean is less than or equal to z=-1.645
none of the above

answer: a. 13/44

step-by-step explanation: judging by the information given to us, we are looking for experimental probability. we can see that 13 males have chosen chocolate ice cream. there are 44 ice creams in total (remember that the total is always the denominator). so our answer is 13/44.

14.3

step-by-step explanation:

add all the numbers together.

9 + 12 + 15 + 16 + 17 + 17 = 86

now, divide 86 by how many numbers we have: 6.

86 / 6 = 14.3

we have three similar triangles, because each has a right angle and shares an angle.   let's write the angles in order: opposite to short leg, long leg, hypotenuse.

cab similar to bad similar to cbd

or as ratios,

ca: ab: cb = ba: ad: bd = cb: bd: cd

we also know

ac = ad + cd

(ad+cd): ab: cb = ba: ad: bd = cb: bd: cd

(ad+cd)/cb=cb/cd

we have cb=6, ad=5 and seek x=cd.

we reject the negative root and conclude x=4

answer: 4

1/8 3/16 3/4

step-by-step explanation:

you put them as all the same denominator and multiply