Confidence Intervals and p hat Quiz

What is the first condition that needs to be checked in problems related to confidence intervals?

• Data needs to come from a systematic random sample

• Data needs to come from a stratified random sample

• Data needs to come from a cluster random sample

• Data needs to come from a simple random sample

Tags

CCSS.HSS.IC.B.4

What does the 10 % condition ensure in problems related to confidence intervals?

• It ensures that trials or selections are approximately independent of one another

• It ensures that the sample size is at least 10

• It ensures that the data is normally distributed

• It ensures that the sample is a simple random sample

Tags

CCSS.HSS.IC.B.4

What is the purpose of checking the large counts condition in problems related to confidence intervals?

• To ensure that the population data is normally distributed

• To ensure that the sample size is large enough

• To ensure that the data is not biased

• To ensure that the sampling distribution of p hat is approximately normal

Tags

CCSS.HSS.IC.B.4

What substitution is made in the formula for the standard deviation in problems related to confidence intervals?

• P hat is substituted for n

• P is substituted for p hat

• P hat is substituted for p

• N is substituted for p

What symbol is used to represent the critical value in problems related to confidence intervals?

• T star

• Z star

• X star

• Y star

Tags

CCSS.HSS.ID.A.4

What is the critical value for an 80% confidence interval?

• 0.84

• 2.33

• 1.96

• 1.28

Use Table A or invNorm( to calculate a critical value for a confidence level of 94%

• z* = 1.88

• z* = 1.55

• {-0.038, 0.038}

• {-0.075, 0.075}

What is the purpose of the critical value in problems related to confidence intervals?

• To determine the sample size

• To estimate the population parameter

• To calculate the standard deviation of the sample

• To determine the boundaries where a certain percentage of the values for p hat lie within

Tags

CCSS.HSS.IC.B.4

What is the formula for making a confidence interval on a p problem?

• P hat plus or minus a critical value times the standard error

• P plus or minus a critical value times the standard deviation

• P hat plus or minus a critical value times the standard deviation

• P plus or minus a critical value times the standard error

Tags

CCSS.HSS.IC.B.4

What is used as the point estimate in problems related to confidence intervals?

• P

• Z star

• P hat

• N

Tags

CCSS.HSS.IC.B.4