The null and alternate hypotheses are: h0: µ1 = µ2 h1: µ1 ? µ2 a random sample of 15 items from the first population showed a mean of 50 and a standard deviation of 5. a sample of 12 items for the second population showed a mean of 46 and a standard deviation of 15. assume the sample populations do not have equal standard deviations. (a) find the degrees of freedom for unequal variance test. (round down your answer to the nearest whole number.) degrees of freedom (b) state the decision rule for .05 significance level. (negative amounts should be indicated by a minus sign. round your answers to 3 decimal places.) reject h0 if t is not between and (c) compute the value of the test statistic. (round your answer to 3 decimal places.) value of the test statistic (d) what is your decision regarding the null hypothesis? use the .05 significance level.

translate k to n and reflect across the line containing jk.

idk

step-by-step explanation:

answer:   35 % is the probability of a late departure or an early arrival.

step-by-step explanation:

let l represents the late departure and e represents the early departure.

then, according to the question,

p(l) = 12 %,   p(e) = 27 % and = 4 %

and, we have to find out,

but, we know that,

which is the required equation that will use to find the probability of a late departure or an early departure.

therefore,   the probability of a late departure or an early arrival =   35 %

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.