Statistics and Probability Questions

Group A ran every day for a month. Group B did not. The numbers shown are the times (in minutes) it took each member to run five kilometers. Group A: 19, 20, 18, 25, 14, 12, 18, 21, 10, 11, 13 Group B: 21, 22, 18, 19, 23, 18, 26, 30, 29, 27, 21 What is the mean time for Group A?

• 16.5 minutes

• 17.0 minutes

• 18.0 minutes

• 19.0 minutes

Tags

CCSS.6.SP.B.5C

Which group had the higher mean. What does that tell you about the runners?

Tags

CCSS.HSS.ID.A.3

Which group had the higher standard deviation. What does that tell you about the runners?

• Group A had the higher standard deviation, indicating more variability in their running times.

• Group B had the higher standard deviation, indicating more consistency in their running times.

• Group A had the higher standard deviation, indicating more consistency in their running times.

• Group B had the higher standard deviation, indicating more variability in their running times.

On average Megan sends 45 texts a day, with a standard deviation of 3 texts. Draw this information on a normal curve and label the percentages.

Tags

CCSS.HSS.ID.A.4

What is the probability that she will send between 39 and 51 texts a day?

• 0.15

• 0.25

• 0.35

• 0.45

Tags

CCSS.HSS.ID.A.4

What is the probability that she will send more than 51 texts a day?

• 0.1

• 0.3

• 0.5

• 0.7

Tags

CCSS.HSS.ID.A.4

What is the probability that she will send less than 42 texts a day?

• 0.1

• 0.3

• 0.5

• 0.7

Tags

CCSS.HSS.ID.A.4

A team’s annual carwash fundraiser usually raises $600, with a standard deviation of $40. Find the probability, for each amount of annual fundraiser money contributed. (know with z score table & technology) Less than $680 _______

Tags

CCSS.HSS.ID.A.4

A team’s annual carwash fundraiser usually raises $600, with a standard deviation of $40. Find the probability, for each amount of annual fundraiser money contributed. (know with z score table & technology) Greater than $520 _______

Tags

CCSS.HSS.ID.A.4

Between $560 and $720 _______

Tags

CCSS.2.NBT.A.4