Shelagh

The fastest bird is the spine-tailed swift, which reaches speeds of 171 km/h. Suppose that you wish to shoot such a bird with a 22-caliber rifle that fires a bullet with a speed of 366 m/s. If you fire at the instant when the bird is 30 m directly overhea...

While cleaning her dorm room, Monica mistakenly pushed three coins off the desk. When they land on the chair below, find the odds (a) in favor of getting exactly three heads (b) in favor of getting exactly three tails (c) against getting exactly two heads...

You start your shift as a cashier with your drawer containing ten $1 bills, 5 $2 bills, three $5 bills, one $10 bill and one $100 bill. Find the expectation if one bill is selected.

At this year's State Fair, there was a dice rolling game. If you rolled two dice and got a sum of 2 or 12, you won $20. If you rolled a 7,you won $5. Any other roll was a loss. It cost $3 to play one game with one roll of the dice. What is the expectation...

Four coins fall onto the floor. Find the probability that (a) exactly three coins land heads up (b) all coins land tails up (c) two or more coins land heads up (d) no more than two coins land tails up (e) at least one coin lands tails up

An aptitude test has a mean of 300 and a standard deviation of 40. The test scores are normally distributed. If 1000 people take the test, find the number of people who will score between 280 and 360.

The average hourly wage of employees of a certain company is $14.58. Assume the variable is normally distributed. If the standard deviation is $3.99, find the probability that a randomly selected employee earns less than $9.79.

Find the equation of the regression line. x - 12 14 10 9 15 8 y - 29 35 28 23 36 18

Find the equation of the regression line and predict y when x = 2.5. x - 1 5 4 2 3 6 y - 25 5 10 20 15 5