Prob Stats 6.1 part 1 Classwork

(a) A professional photographer is interested in the average number of photographs she took per day last year. She randomly selected 10 days from the year and recorded the number of photographs she took on each of the 10 days. The average number of photographs she took on those 10 days is 831.2 photos.

The population is...

• The ten days randomly selected

• All days

• The average number of all photographs she took per day last year

• 831.2 photos

(a) A professional photographer is interested in the average number of photographs she took per day last year. She randomly selected 10 days from the year and recorded the number of photographs she took on each of the 10 days. The average number of photographs she took on those 10 days is 831.2 photos.

The sample is...

• The ten days randomly selected

• All days

• The average number of all photographs she took per day last year

• 831.2 photos

(a) A professional photographer is interested in the average number of photographs she took per day last year. She randomly selected 10 days from the year and recorded the number of photographs she took on each of the 10 days. The average number of photographs she took on those 10 days is 831.2 photos.

The parameter is...

• The ten days randomly selected

• All days

• The average number of all photographs she took per day last year

• 831.2 photos

(a) A professional photographer is interested in the average number of photographs she took per day last year. She randomly selected 10 days from the year and recorded the number of photographs she took on each of the 10 days. The average number of photographs she took on those 10 days is 831.2 photos.

The statistic is...

• The ten days randomly selected

• All days

• The average number of all photographs she took per day last year

• 831.2 photos

(a) A Pew Research Center Poll asked a random sample of U.S. adults 18 years old or older whether they prefer a male co-worker, a female co-worker, or whether it doesn’t matter. Of the 2002 respondents, 77% said it “doesn’t matter.”

The true proportion of US adults who said it doesn't matter is the...

• parameter

• statistic

• sample

• population

(a) A Pew Research Center Poll asked a random sample of U.S. adults 18 years old or older whether they prefer a male co-worker, a female co-worker, or whether it doesn’t matter. Of the 2002 respondents, 77% said it “doesn’t matter.”

All US adults (18 years or older) is the

• parameter

• statistic

• sample

• population

(a) A Pew Research Center Poll asked a random sample of U.S. adults 18 years old or older whether they prefer a male co-worker, a female co-worker, or whether it doesn’t matter. Of the 2002 respondents, 77% said it “doesn’t matter.”

The 2002 respondents is the...

• parameter

• statistic

• sample

• population

(a) A Pew Research Center Poll asked a random sample of U.S. adults 18 years old or older whether they prefer a male co-worker, a female co-worker, or whether it doesn’t matter. Of the 2002 respondents, 77% said it “doesn’t matter.”

The 77% is the...

• parameter

• statistic

• sample

• population

In a dot plot of a sampling distribution, what does every dot represent?

• A measurement from an individual

• A measurement from a sample

• A measurement from a population

In order for an event to be statistically significant, it has to occur by chance...

• less than 5% of the time

• more than 5% of the time

• 5% of the time