these are the questions that were too blurry in the last set... Question 9 Find the z-score represented by a. P(z a)=0.8461 Question 10 options:

these are the questions that were too blurry in the last set...

Question 9 Find the z-score represented by a.

P(z

Question 9 options:

0.8023

1.02

-1.02

-0.8023

Question 10 (1 point) Find the z-score represented by a.

P(z>a)=0.8461

Question 10 options:

-1.02

-0.8023

0.8023

1.02

Question 11 (1 point) The random variable x is normally distributed with a mean of = 82.7 and a standard deviation of = 11.2.

Find the probability. The answers are found using z-score tables. If solved with the calculator, choose the answer closest to the result from the calculator.

P(x<90.2)

Question 11 options:

0.7486

-0.6696

0.2514

0.6696

Question 12 (1 point) The random variable x is normally distributed with a mean of = 56.3 and a standard deviation of = 7.4.

Find the probability. The answers are found using z-score tables. If solved with the calculator, choose the answer closest to the result from the calculator.

P(x<62.2)

Question 12 options:

0.2119

-0.7973

0.7973

0.7881

Question 13 (1 point) The random variable x is normally distributed with a mean of = 56.3 and a standard deviation of = 7.4.

Find the probability. The answers are found using z-score tables. If solved with the calculator, choose the answer closest to the result from the calculator.

P(x>60.5)

Question 13 options:

0.5676

0.7157

0.2843

0.4324

Question 14 (1 point) The random variable x is normally distributed with a mean of = 142.6 and a standard deviation of = 18.3.

Find the probability. The answers are found using z-score tables. If solved with the calculator, choose the answer closest to the result from the calculator.

P(x>171.8)

Question 14 options:

0.0548

0.9452

0.8554

0.1446

Question 15 (1 point) The random variable x is normally distributed with a mean of = 82.7 and a standard deviation of = 11.2.

Find the probability. The answers are found using z-score tables. If solved with the calculator, choose the answer closest to the result from the calculator.

P(x<79.4)

Question 15 options:

0.2946

0.3859

0.6141

0.7054

Question 16 (1 point) The random variable x is normally distributed with a mean of = 56.3 and a standard deviation of = 7.4.

Find the probability. The answers are found using z-score tables. If solved with the calculator, choose the answer closest to the result from the calculator.

P(x<51.8)

Question 16 options:

0.3919

0.7291

0.6081

0.2709

Question 17 (1 point) The random variable x is normally distributed with a mean of = 56.3 and a standard deviation of = 7.4.

Find the probability. The answers are found using z-score tables. If solved with the calculator, choose the answer closest to the result from the calculator.

P(60

Question 17 options:

0.6756

0.1895

0.6800

0.7517

Question 18 (1 point) The random variable x is normally distributed with a mean of = 56.3 and a standard deviation of = 7.4.

Find the value of x which represents the cut-off score for the top 18%. The answers are found using z-score tables. If solved with the calculator, choose the answer closest to the result from the calculator.

Question 18 options:

63.1

62.2

50.4

49.5

Question 19 (1 point) The random variable x is normally distributed with a mean of = 82.7 and a standard deviation of = 11.2.

Find the value of x which represents the cut-off score for the bottom 20%. The answers are found using z-score tables. If solved with the calculator, choose the answer closest to the result from the calculator.

Question 19 options:

92.1

73.3

84.9

80.5

Question 20 (1 point) In local elections the typical voter turnout is 17% of registered voters. If 20 registered voters are randomly selected, what is the probability that exactly 3 of them voted in a local election? Question 20 options:

0.236

0.614

0.00491

0.510