Binomial, Geometric, and Sampling Distributions

Given a population of values: {1, 2, 3, 4}, create a sampling distribution by finding the mean of all possible samples of size 3. What is compared to μ?

• 
• 
• 
• 

Tags

CCSS.HSS.IC.B.4

CCSS.HSS.MD.A.3

CCSS.HSS.IC.A.1

CCSS.HSS.MD.A.2

Portly Polls is taking a poll on whether twins have eaten a sandwich for lunch. Is this a proportion problem or a situation involving means? Why?

• means -- we are looking at averages

• means -- we are looking for a yes/no

• proportion -- we are looking for a yes/no

• proportion -- we are looking at averages

Tags

CCSS.HSS.IC.B.4

• the standard deviation of a population

• the standard deviation of a sample

• the mean of a population

• the mean of a sample

Picky Polls is taking a poll on how many TVs twins own on average. Is this a proportion problem or a situation involving means? Why?

• means -- we are looking at averages

• means -- we are looking for a yes/no

• proportion -- we are looking at averages

• proportion -- we are looking for a yes/no

Tags

CCSS.HSS.IC.B.4

When are you looking at a mean based problem?

• When the collected information consists of two options (yes and no for example)

• When the questions consist of numbers

• When the collected information consists of numbers

• When the questions consist of two options (yes and no for example)

Tags

CCSS.HSS.IC.B.4

CCSS.HSS.ID.A.2

Given a population of values: {1, 2, 3, 4, 5, 6}, create a sampling distribution by finding the mean of all possible samples of size 2. What is compared to μ?

• 
• 
• 
• 

What does σ² equal?

• p(p-1)/n

• σ²/n

• n(p-1)/p

• p(1-p)/n

Portly Polls asked 1585 fourth year college students if they still had their original major. According to the colleges, 20% of all fourth year college students still had their original major. What is the probability that Portly Polls' random sample will give a result within 1% of the true value?

• 68.26%

• 15.87%

• 84.13%

• 52.39%

Tags

CCSS.HSS.IC.B.4

CCSS.HSS.ID.A.4

CCSS.HSS.IC.A.1

Polly's Polls asked 1724 third year college students if they have already taken their science requirements. According to the colleges, 20% of all third year college students have already taken their science requirements. Polly's Polls got less than 344 students who said they have already taken their science requirements. How likely is this result?

• 4.23%

• 37.59%

• 48.01%

• 63.24%

Tags

CCSS.HSS.IC.B.4

What does μ equal?

• 
• 
• 
•