Stats Unit 2

A uniform distribution has a range of 5. What is the height of the distribution?

• 5
• .2
• .1
• .5

Data set x has a mean of 20 and a standard deviation of 4. If transformation y=2+3x is applied to every value, what is the new mean?

• 22
• 60
• 20
• 62

Data set x has a mean of 20 and a standard deviation of 4. If transformation y=2+3x is applied to every value, what is the new standard deviation?

• 4
• 6
• 12
• 14

The number of standard deviations away from the mean that a value is represents the value's

• percentile rank
• z-score
• IQR
• median

On the standard normal curve, the area below z=.34 is...

• .34
• .367
• .633
• .66

Tags

CCSS.HSS.ID.A.4

On the standard normal curve, the z-score that represents the 70th percentile is 

• .7
• -.52
• .3
• .52

Tags

CCSS.HSS.ID.A.4

The IQR of the standard normal curve is 

• .67
• 1.35
• .5
• 1

Tags

CCSS.6.SP.B.5C

The weights of two-year old humans are normally distributed with a mean of 25 pounds and a standard deviation of 4 pounds. What percent weigh over 30 pounds?

• .3481
• .2165
• .8943
• .1056

Tags

CCSS.HSS.ID.A.4

The weights of two-year old humans are normally distributed with a mean of 25 pounds and a standard deviation of 4 pounds. What is the percentile of a 28 pound baby?

• 75th
• 22nd
• 25th
• 77th

Tags

CCSS.HSS.ID.A.4

The weights of two-year old humans are normally distributed with a mean of 25 pounds and a standard deviation of 4 pounds. Which range of values represents 68% of two year old baby weights?

• 24-26
• 22-28
• 21-29
• 17-33

Tags

CCSS.HSS.ID.A.4