Ap Stats Summer(part 3)

Question 1

If I take a random sample of 20 hamburgers from FIVE GUYS and count the number of pickles on a bunch of them… and one of them had 9 pickles, then the number 9 from that burger would be called ____?

Answer 1

a datum, or a data value.

Question 2

If I take a random sample 20 hamburgers from FIVE GUYS and count the number of pickles on a bunch of them… and the average number of pickles was 9.5, then 9.5 is considered a _______?

Answer 2

statistic. (t is a summary of a sample.)

Question 3

If I take a random sample of 20 hamburgers from FIVE GUYS and count the number of pickles on a bunch of them… and I do this because I want to know the true average number of pickles on a burger at FIVE GUYS, the true average number of pickles is considered a ______?

Answer 3

parameter, a one number summary of the population(parameter of interest)

Question 4

What is the difference between a sample and a census?

Answer 4

A sample gathers info from part of a population, a census gathers info from the entire population, you can get a parameter from a census, you can only get a statistic from a sample

Question 5

Use the following words in one sentence: population, parameter, census, sample, data, statistics, inference, population of interest.

Answer 5

I was going to use a census but decided that a sample would be more suitable so I collected data, calculated a statistic, and used that statistic to make an inference about the population parameter, or the parameter of interest.

Question 6

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If you are tasting soup.. Then the flavor of each individual thing in the spoon is the ________, the entire spoon is a ______.. The flavor of all of that stuff together is like the _____ and you use that to __________ about the flavor of the entire pot of soup, which would be the__________.

Answer 6

the flavor of each individual thing in the spoon is DATA, the entire spoon is a SAMPLE. The flavor of all of that stuff together is like the STATISTIC, and you use that to MAKE AN INFERENCE about the flavor of the entire pot of soup, which would be the PARAMETER

Question 7

What are random variables?

Answer 7

Data collected from randomly chosen individuals(measures are determined by chance)

Question 8

What is the difference between quantitative and categorical variables?

Answer 8

Quantitative variables are numerical measures, like height and IQ. Categorical are categories, like eye color and music preference

Question 9

What is the difference between quantitative and categorical data?

Answer 9

Quantitative data is the numbers gathered from each subject, categorical(qualitative) data is the individual category such as blue or sophomore(usually words)

Question 10

What is the difference between discrete and continuous variables?

Answer 10

Discrete can be counted, like “number of cars sold”(generally integers), while continuous can be any value, like weight of a mouse… 4.344 oz.