7.1 Quizizz Homework

What is the format for interpreting a confidence interval? 

• The interval from ___ to ___ captures the true mean in context.
• C% of samples of the same size taken from the same population will capture the parameter in question
• There is convincing evidence that C% gives the interval (___, ___) capturing the parameter in question.
• We are C% confident that the interval from ___ to ___ captures the [parameter in context].

Tags

CCSS.HSS.IC.A.1

CCSS.HSS.IC.B.4

Given the interval (1.2, 1.8), what is the point estimate and the margin of error? 

• 1.5, 0.6
• 1.5, 0.3
• 1.2, 0.3
• 1.2, 0.6

Tags

CCSS.HSS.IC.B.4

What is a point estimate?

• average of sample values

• average of population values

• a single value that represents the unknown sample statistic

• a single value that represents the unknown population parameter

A property of a point estimator that occurs whenever a large sample sizes tend to provide point estimates closer to the population parameter

• efficiency

• unbiased

• consistency

• relative estimation

A random sample of 121 bottles of cologne showed an average content of 4 ounces. It is known that the population standard deviation of the contents is 0.22 ounces. In this problem, the 4 ounces is?

• A parameter

• A statistic

• The standard error of the mean

• The average content of colognes in the long run

The scores of a random sample of 100 high school students on a standardized mathematics test in school A gave a mean of 78 and a standard deviation of 20.

What is the best point estimate of the true average score in this standardized mathematics test?

• 20

• 78

• 95

• 100

Tags

CCSS.HSS.IC.B.4

If the 95% Confidence Interval for a population mean is (114.56, 125.54), then is it likely that the true population mean µ is greater than 130?

• Yes

• No

• Not enough information

• I have no idea what you're asking of me

Tags

CCSS.HSS.IC.A.1

CCSS.HSS.IC.B.4

Complete the equation: 
point estimate +/- _____

• standard deviation
• margin of error
• critical value
• confidence level

Tags

CCSS.HSS.IC.B.4

Suppose that $51,759 was the median income for all households in 2012. Does the interval ($51,484, $52,394) provide convincing evidence that the median household income is not still $51,759?

• Yes

• No

What is the point estimate for the interval (-5 , 13)?

• 13

• 4

• 9

• -5