Sampling Distributions Review

As the sample size increases, the standard deviation of the sampling distribution ______________.

• decreases

• increases

• becomes more normal

• gets close to 1

According to a recent newspaper article, 64% of teens have an active twitter account. 64% is a ____________.

• statistic

• parameter

• population

• sample

Tags

CCSS.HSS.IC.B.3

A population has mean μ = 25 and standard deviation σ = 3.4. Find the mean and standard deviation of sampling distribution when n = 16.

• 25, 0.85

• 25, 3.4

• 6.25, 0.85

• 6.25, 3.4

A large population is skewed left. Describe the sampling distribution of sample means of size 50.

• normal

• approximately normal

• skewed right

• skewed left

28% of all Woodrow students believe Monday will be snow day. You take a sample of 50 students and find that 15 of them believe Monday will be a snow day. What does 50 represent? 

• n
• P
• phat
• standard deviation

What happens to the shape of a sampling distribution of sample means as n increases?

• It becomes narrower and bimodal.
• It becomes narrower and more normal.
• It becomes wider and skewed right. 
• It becomes wider and more normal. 

• the standard deviation of a population

• the standard deviation of a sample

• the mean of a population

• the mean of a sample

How can you check to see if your sample of size n is large enough to apply the Central Limit Theorem?

• n ≤ 10

• n ≤ 30

• n ≥ 10

• n ≥ 30

Tags

CCSS.HSS.ID.A.4

A random sample of female college students has a mean height of 64.5 inches, which is greater than the 63 inch mean height of all adult American women. 63 inches is a

• Sample

• Population

• Statistic

• Parameter

Tags

CCSS.HSS.IC.B.3

At a particular college, 78% of all students are receiving some kind of financial aid.The school newspaper selects a random sample of 100 students and 72% of the respondents say they are receiving some sort of financial aid. Which of the following is true?

•  78% is a population and 72% is a sample.
• 72% is a population and 78% is a sample
• 78% is a parameter and 72% is a statistic
• 72% is a parameter and 78% is a statistic

Tags

CCSS.HSS.IC.B.3