21 Questions |
By KristinaAxelsson | Last updated: Apr 26, 2013
| Total Attempts: 128
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Questions and Answers
1.
People on the street were asked "How many siblings do you have?". The following diagram shows the result:
How many people answered the question?
2.
People on the street were asked "How many siblings do you have?". The following diagram shows the result:
What's the mode?
3.
People on the street were asked "How many siblings do you have?". The following diagram shows the result:
What's the mean?
4.
People on the street were asked "How many siblings do you have?". The following diagram shows the result:
What's the median?
5.
A culture assiciation wanted to find out what the citizens of the town thought about the idea of building a new house of culture. A survey was made and 200 people who were entering the theater were asked. Which of the following alternatives is the highest contributor to a source of error being made in this survey?
A.
200 people is not enough - more people should be asked!
B.
There should be a random sample! People attending the theater are more interested in culture than an average citizen!
6.
A bag of marbles contains 5 black and 3 white marbles. You pick two marbles without looking (and no replacement).
Determine the probability that the first marble is black. (Express your answer as a fraction)
7.
A bag with marbles contains 5 black and 3 white marbles. You pick two marbles without looking (and no replacement).
Determine the probability that both marbles are black. (Write as a fraction)
8.
You have received a phone number on a note, but the last digit in the number is missing!
073-309601....
Determine the probability that by choosing a random number for the last digit, you will get the correct phone number.
9.
All students in a town were tested for colour blindness:
Normal vision: Boys 9800 Girls 9360
Colour blind: Boys 720 Girls 120
a) Determine the probability that a boy is colour blind. (Express your answer in percentage form with one decimal)
10.
All students in a town were tested for colour blindness:
Normal vision: Boys 9800 Girls 9360
Colour blind: Boys 720 Girls 120
a) Determine the probability that a girl is colour blind. (Express your answer in percentage form)
11.
Use the grid to determine the probability of getting the sum 7 when two dice are rolled. (Express your answer as a fraction)
12.
Use the grid to determine which event has the highest probability: getting the sum 5 or getting the sum 10 when two dice are rolled?
A.
Getting the sum 5 is more likely
B.
Getting the sum 10 is more likely
13.
M=Male
F=Female
Use the tree diagram to determine the probability that a family with three children consists of three boys. (Express your answer as a fraction)
14.
M=Male
F=Female
Use the tree diagram to determine the probability that the children in a family with three children have different gender. (Express your answer as a fraction)
15.
There are 4 grey socks, 4 black socks and 4 white socks in a drawer. You pick two socks without looking (and without replacement). What are chances that both socks have the same colour? (Draw a tree diagram and then express your answer as a fraction.)
16.
You plant three seeds. The chance for a seed to grow is 80%. Determine the probability that no seed grows. (Express your answer in percentage form)
17.
You plant three seeds. The chance for a seed to grow is 80%. Determine the probability that at least one seed grows. (Express your answer in percentage form)