The sample had a mean of 34.6 miles per hour with a standard deviation of 8.4 miles per hour we can assume that vehicle speeds on this street during weekday mornings are approximately normally distributed at a 5% level of significance, can we conclude that the average speed of vehicles on the street during weekday mornings is greater than the speed limit?

a

step-by-step explanation:

the answer is a

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 %

the answer is a) y= 2 csc [0.5 (x+pi/2)]-1

step-by-step explanation:

answer: 8

step-by-step explanation: