Confidence Interval and Hypothesis Testing

Question 1

is like a hidden fact about an entire group or population. It’s a number that
summarizes something important about everyone or everything you’re interested in
studying.

Answer 1

Parameter

Question 2

is the average value of a variable in a sample. It is calculated by adding up all
the values and dividing by the sample size

Answer 2

Sample Mean

Question 3

is the fraction of a sample that has a certain attribute or outcome. It is
calculated by dividing the number of observations with that attribute or outcome by the
sample size

Answer 3

Sample Proportion

Question 4

The results is called _______, give you probability statements about the population of interest based on that set of data

Answer 4

Statistical inference

Question 5

Type of statistical inference that use information from the sample to estimate (or predict) the parameter of interest.

Answer 5

Estimation

Question 6

A type of statistical inference that use information from the sample to determine whether a certain statement about the parameter of interest is true.

Answer 6

Statistical test

Question 7

Another term for statistical Tests

Answer 7

Hypothesis tests

Question 8

The two common estimation methods are

Answer 8

point and interval estimates

Question 9

An estimate for parameter that is one numerical value. An example of a point estimate is the sample mean or the sample proportion.

Answer 9

Point Estimates

Question 10

A type of estimation method that gives an interval as the estimate for a parameter. Such intervals are built
around point estimates which is why understanding point estimates is important to
understanding interval estimates.

Answer 10

Interval Estimates

Question 11

The interval estimates we find are referred to as

Answer 11

confidence intervals

Question 12

A probability that a parameter will fall between a set of values

Answer 12

Confidence Interval

Question 13

refers to the probability that a population parameter will fall
between a set of values for a certain proportion of times.

Answer 13

Confidence interval

Question 14

The center of our interval should be the point estimate for the parameter of interest. With the
estimated standard error of the point estimate, we can include a measure of confidence to our
estimate by forming a

Answer 14

Margin of error

Question 15

is a formal procedure for investigating
our ideas about the world using statistics.

Answer 15

Hypothesis Testing