Statistics final

Question 1

there is a raffle that 50 people enter, 2 people win, what's the chance of winning

Accepted Answer

4%

Question 2

what is the mean of this data set: 2,5,7,9,12,16,19,20,21,27?

Accepted Answer

13.8

Question 3

a probably distribution has to have a sum of 1

Accepted Answer

True

Question 4

which one of these is NOT a binomial experiment

Accepted Answer

asking 100 people their hair color

Question 5

true or false, cumulative frequency is a part of a frequency table?

Accepted Answer

True

Question 6

for an ogive graph, what is on the x and y axis?

Accepted Answer

cumulative frequency, class boundaries

Question 7

what is a frequency table?

Accepted Answer

a table that lists items and shows the number of times the items occur

Question 8

2% of the world has red hair and 100 of people are selected at random what's the probability that 5 have red hair?

Accepted Answer

3.5%

Question 9

what type of data is commonly used in frequency tables?

Accepted Answer

all of the above/ any quantitive data

Question 10

standard deviation is the square root of the variance.

Accepted Answer

True

Question 11

definition of a discrete probability distribution

Accepted Answer

the probability of occurrence of each value of a discrete random variable

Question 12

what is this called?

Accepted Answer

box and whisker plot

Question 13

what is standard deviation?

Accepted Answer

a measure of the amount of dispersion of a set of values.

Question 14

what is q1, q2,q3, low and high of this data: 25, 25, 37, 37, 40, 41, 48, 56, 63, 72?

Accepted Answer

37, 40.5, 56, 25, 72

Question 15

what are the class boundaries for this data set?

Accepted Answer

0-12.5, 12.5-16.5, 16.5-20.5, 20.5-24.5, 24.5-29.5

Questions 15