Question
Polls and surveys taken over the internet are statistically faulty in that the data (the people) choose whether or not they will be in the
Polls and surveys taken over the internet are statistically faulty in that the "data" (the people) choose whether or not they will be in the sample. This type of sample is
a. | Stratified | |
b. | Cluster | |
c. | Convenience | |
d. | Voluntary Response |
22)
The layers of a stratified sample are referred to "observational levels"
a. | TRUE | |
b. | FALSE |
23)
If one made a list of the Governors' salaries from each state, the list would be considered a "census"
a. | TRUE | |
b. | FALSE |
24)
When some individuals chosen to be in the samples refuse to participate, this is said to occur:
a. | nonresponse | |
b. | variability | |
c. | sampling frame | |
d. | undercoverage |
25)
If one made a list of the Governors' salaries from each state, the list would be considered a "sample"
a. | TRUE | |
b. | FALSE |
26)
If a population size is large relative to the sample size, the precision of results will be the same whether the population size is 20,000 or 20 million
a. | TRUE | |
b. | FALSE |
27)
A value generated from the population data
a. | population | |
b. | sample | |
c. | parameter | |
d. | statistic |
28)
If the probability of an event is 0.384, then the probability of the complement of this event would be ____
29) A jar contains 6 red marbles, 9 white marbles, 9 green marbles, and 6 blue marble. What is the probability that, if one marble is randomly selected, the marble will be not red? Round to three decimal places
30)
If there are 2 lefthanded people in a group of size 47, we would say the probability of randomly selecting a righthander from the group is_______ (round to the third decimal place)
31)
A jar contains 4 red marbles, 8 white marbles, 5 green marbles, and 9 blue marble. What is the probability that, if one marble is randomly selected, the marble will be either green or blue? Round to three decimal places
32)
A jar contains 5 red marbles, 13 white marbles, 3 red gumballs, and 4 white gumballs. If one object is selected at random, and you notice it is red, what is the probability it is a gumball given that is one of the red things? Round to 3 decimal places
33)
In a statistics class, we find that at the end of the semester 3 people have an A, 7 people have a B, 11 people have a C, 2 people have a D, and 1 people have an F. If we randomly select one of these people, what is the probability the person has at least a C? Round to three decimal places
34) A jar contains 35 $1 bills 8 $5 bills 4 $10 bills 3 $20 bills 3 $50 bills 1 $100 bill Every day for one year (365 times) you get to randomly pick a bill from the jar (the jar is refilled after every pick). For the year, what is the expected value of the total money you have won? Round to the nearest dollar
35) A jar contains 23 $1 bills 7 $5 bills 5 $10 bills 2 $20 bills 3 $50 bills 2 $100 bill Every day for one year (365 times) you get to randomly pick a bill from the jar (the jar is refilled after every pick). For the year, what is the expected value of the total money you have won? Round to the nearest dollar
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