Random Variables

• .88

• .12

• .78

• .22

Tags

CCSS.HSS.MD.A.1

CCSS.HSS.CP.A.1

• 1.67

• 1.077

• 2.0

• 1.41

Tags

CCSS.HSS.MD.A.2

CCSS.HSS.MD.A.3

CCSS.HSS.MD.B.5

• 1.67

• 1.0775

• 1.581

• 1.414

Tags

CCSS.HSS.MD.A.2

CCSS.HSS.MD.A.3

CCSS.HSS.ID.A.4

• .22

• .64

• .36

• .78

Tags

CCSS.HSS.MD.A.1

• .21

• .79

• .64

• .89

Tags

CCSS.HSS.MD.A.3

CCSS.HSS.MD.A.1

CCSS.HSS.CP.A.1

CCSS.HSS.CP.B.7

The mean amount of time to mix the batter for a cake is 14 minutes with a standard deviation of 2.5 minutes. The mean amount of time to bake the cake is 35 minutes with a standard deviation of 6.2 minutes. What is the mean time to make and bake a cake? What is the standard deviation?

• mean = 49 min sd = 8.7 min

• mean = 49 min sd = 6.685 min

• mean = 21 min sd = 8.7 min

• mean = 21 min sd = 6.685 min

Tags

CCSS.HSS.MD.A.2

CCSS.HSS.ID.A.2

The mean hourly salary for a high school graduate is $13.50 per hour with a standard deviation of $5.75. The mean hourly salary for a person with an Associate's degree is $19.75 with a standard deviation of $9.25. What is expected difference in the hourly salaries between a high school graduate and a person who earned an Associate's degree?

• $33.25

• $-3.50

• $-6.25

• $15.00

Tags

CCSS.8.EE.C.8C

The mean hourly salary for a high school graduate is $13.50 per hour with a standard deviation of $5.75. The mean hourly salary for a person with an Associate's degree is $19.75 with a standard deviation of $9.25. What is the standard deviation of the difference in the hourly salaries between a high school graduate and a person who earned an Associate's degree?

• $10.89

• $7.25

• $-3.50

• $15.00

Tags

CCSS.HSS.ID.A.2

CCSS.HSS.ID.A.4

The graph shows the probability distribution for the number of orders per week for a randomly selected week at an Etsy store. What is the expected number of orders and the standard deviations of the number of orders?

• 44.5, 2.449

• 44.5, 2.291

• 44.64, 1.694

• 44.64, 1.672

Tags

CCSS.HSS.MD.A.2

CCSS.HSS.MD.A.3

CCSS.HSS.MD.A.1

The model shown above shows the probability for rental units based on the number of rooms. What is the expected value and the standard deviation of the number of rooms in a rental unit?

• 5, 2.7386

• 5, 2.5820

• 4.355, 1.5647

• 4.355, 1.2996

Tags

CCSS.HSS.MD.A.2

CCSS.HSS.MD.A.3

CCSS.HSS.MD.B.5