9.3: Mean and Standard deviation

Find the mean of these numbers:
5,11,2,12,4,2

• 4.1
• 6
• 4.5
• 4

Tags

CCSS.6.SP.A.3

CCSS.6.SP.B.5

Find the standard deviation of these numbers:

5,11,2,12,4,2

• 4.04

• 4.5

• 4.43

• 2

What is the mean for the data given:

{12, 13, 29, 18, 61, 35, 21}

• 27

• 17.14

• 15.87

• 21

What is the standard deviation for the data given:

{12, 13, 29, 18, 61, 35, 21}

• 27

• 15.87

• 17.14

• 21

Jessica has five grades from assessments and quizzes. They are all weighted equally. If her grades are 50, 70, 88, 70, and 88, what is her current average grade?

• 70

• 15.79

• 73.2

• 60

Jessica has five grades from assessments. They are all weighted equally. If her grades are 50, 70, 88, 70, and 88, what is the standard deviation?

• 73.2

• 15.79

• 14.11

• 70

Ervin bowled 7 games last weekend. His scores are: 155, 165, 138, 172, 127, 193, 142. What is the mean of Ervin's scores?

• 156

• 22.61

• 155

• 20.94

Ervin bowled 7 games last weekend. His scores are: 155, 165, 138, 172, 127, 193, 142. What is the standard deviation of Ervin's scores?

• 156

• 22.61

• 155

• 20.94