Suppose a baker claims that her bread height is less than 15 cm, on average. several of her customers do not believe her, so the baker decides to do a hypothesis test at a 5% significance level, to persuade them. she bakes loaves of bread. the mean height if the sample loaves is 13 cm. the baker knows from experience that the standard deviation for her bread height is 1.2cm.

what is the test statistic of this one-mean hypothesis test, rounded to two decimal places?

25% is the answer

d. $180

step-by-step explanation:

if the dimensions of the room is 9ft by 12 ft, we have the area of the floor as,

so the area of the floor is 108 square feet, converting that into square yards we get,

the cost of carpet is $15 per square yard, therefore the cost of carpet for 12 square yards is,

hence, the cost of carpet is $180.

assuming the dimensions of the room be,

15 ft by 12 ft

so, the area of the floor of that room is,

we can convert 180 square feet into square yards, we know that,

1 sq ft = 0.111 sq yard

so, 180 square feet is,

so the area of floor is 20 square yards.

now, the cost of carpet is 15 dollars per square yard, therefore the cost of carpet for 20 square yards is,

so, it will cost $300.