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NEED HELP ANSWERING 8 QUESTIONS FOR A MATH HOMEWORK...ATTACHMENT FILE IS INCLUDED..


QUESTION 1: A bag with marbles is shown below. A marble is chosen from the bag at

 

random. What are the odds in favor of choosing a grey marble?

 


 

QUESTION 2: An ordinary (fair) die is a cube with the numbers 1through 6 on the sides

 

(represented by painted spots). Imagine that such a die is rolled twice in succession and

 

that the face values of the two rolls are added together. This sum is recorded as the

 

outcome of a single trial of a random experiment.

 

Compute the probability of each of the following events:

 

Event

 


 

A : The sum is greater than 5

 


 

Event B : The sum is divisible by 4

 

Write your answers as exact fractions.

 


 

QUESTION 3: A box is filled with 2 green cards, 4 red cards, and 8 brown cards. A card

 

is chosen at random from the box. What is the probability that the card is not red?

 

Write your answer as a fraction in simplest form.

 

QUESTION 4: A science class has 7 girls and 5boys in the seventh grade and 2 girls

 

and 2 boys in the eighth grade. The teacher randomly selects a seventh grader and an

 

eighth grader from the class for a competition. What is the probability that the students

 

she selects are both boys?

 

Write your answer as a fraction in simplest form.

 

QUESTION 5: A bag contains

 


 

9 marbles: 3 are green, 2 are red, and 4 are blue.

 


 

Deshaun chooses a marble at random, and without putting it back, chooses another one

 

at random. What is the probability that the first marble is red and the second is blue?

 

Write your answer as a fraction in simplest form.

 


 

QUESTION 6: The 6 students in Mrs. Alexander's class were asked how many minutes

 

it takes them to get to school in the morning. Here is what they answered:

 

12 , 14 , 12 , 10 , 14 , 6

 

Find the mean and median travel times for these students.

 

If necessary, round your answers to the nearest tenth.

 


 

QUESTION 7: Here are yesterday's high temperatures (in Fahrenheit) in

 

50, 51, 59, 63, 63, 65, 67, 73, 76, 76, 80, 84

 


 

12 U.S. cities.

 


 

Notice that the temperatures are ordered from least to greatest.

 

Give the five-number summary and the interquartile range for the data set.

 

1.

 

2.

 

3.

 

4.

 

5.

 


 

MINIMUM =

 

LOWER QUARTILE =

 

MEDIAN = UPPER QUARTILE =

 

MAXIMUM=

 

INTERQUARTILE RANGE=

 


 

QUESTION 8: All 5 members of a family work. Their hourly wages (in dollars) are

 

32 , 37 , 20 , 13 , 23

 

Assuming that these wages constitute an entire population, find the standard deviation

 

of the population. Round your answer to at least two decimal places.

 


 

 


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