The following numbers are gas prices from 12 local gas stations. If Pilot builds another local gas station, what would the gas price need to be so that the average price of gas if $1.49? Chart:

1.30 1.37 1.49 1.50

1.51 1.51 1.54 1.56

1.56 1.58 1.59 1.62

A. 1.24
B. 1.30
C. 1.49
D. 1.50

Rockwell hardness of pins of a certain type is known to have a mean value of 50 and a standard deviation of 1.1. (round your answers to four decimal places.) (a) if the distribution is normal, what is the probability that the sample mean hardness for a random sample of 8 pins is at least 51?

Which of these equations, when solved, gives a different value of x than the other three? a9.1 = -0.2x + 10 b10 = 9.1 + 0.2x c10 – 0.2x = 9.1 d9.1 – 10 = 0.2x

Monthly water bills for a city have a mean of $108.43 and a standard deviation of $32.09. find the probability that a randomly selected bill will have an amount greater than $155, which the city believes might indicate that someone is wasting water. would a bill that size be considered unusual?