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MATH 1342 Exam 3 Review

Marie Graham

Created on October 29, 2025

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Transcript

breakout

GENIALLYLAND

An excitng review of Unit 3 in MATH 1342

start

GENIALLYLAND

Awards achieved:

Throw the clown!

Answer correctly and make the clown fall into the water five times to win your reward

Start

1/5

A random variable X is uniformly distributed between 0 and 6. Find the probability that X is at most 1.

0.1667

0.2000

0.8333

1/5

Great!You remembered to do "part over whole"!

Next

2/5

The graph of a uniform probability distribution is given below. Find the probability represented by the shaded region.

8/10

8/11

7/10

2/5

Great!Remember, a uniform distribution doesn't always have to start at zero!

Next

3/5

X~U(4,12). P(X is at most 6)= ___.

.2500

.1667

0.5000

3/5

Great!Good eye. That one didn't start at zero, but you can't be fooled.

Next

4/5

X~U(0,9)P(x=6.5)=___

0.7222

DNE

4/5

Great!Here you can include a great message congratulating your audience for successfully answering the question

Next

5/5

Calculate the theoretical mean and standard deviation for X~U(5.1, 84.6).

44.85, 2.57

-39.75, 22.95

44.85, 22.95

5/5

Great!Good work finding the right formulas and using them correctly!

Prize!

Try again!

You have won your first stuffed animal

Next challenge!

GENIALLYLAND

Awards achieved:

Are you sure?

You will need to redo theprevious tests to return to where you are now

Stay

Exit

MIRROR MAZE

Which image is the real one?Choose wisely and reach your prize!

Start

1/5

For a normal variable X~N(26, 0.8), use technology to find P(24.5<X<26.5)

2/5

3/5

4/5

5/5

You have won your second stuffed animal

Next challenge!

Try again and give it another go

GENIALLYLAND

Awards achieved:

HORSE RACE

00:03

Start

Answer correctly before time runs out and make your horse reach the finish line first. You might want to have a normal distribution calculator up and ready.

1/5

Suppose X~N(6, 2.5). What is the z score associated with x = 5?

03:00
YOU

-0.4

1.4

0.4

Try again!

1/5

Oops, incorrect

Try again!

2/5

Adult male labrador retrievers weigh an average of 73 lbs with a standard deviation of 6 pounds. Find the z score for a dog weighing 83 lbs.

03:00
YOU

-1.67

0.81

1.67

Try again!

2/5

Oops, it's not correct

Try again!

3/5

Suppose X~N(7, 3.2). What value is 2 standard deviations to the LEFT of the mean?

03:00
YOU

13.4

0.6

1.5

Try again!

3/5

Oops, it's not correct

Try again!

4/5

Find the area of the shaded region.

03:00
YOU

0.7054

0.2946

0.3228

Try again!

4/5

Oops, incorrect

Try again!

5/5

Find the area of the shaded region under the standard normal distribution.

03:00
YOU

0.9367

0.0559

0.0486

Try again!

5/5

Oops, incorrect

Try again!

You've won your third stuffed animal

Next challenge!

GENIALLYLAND

Awards received:

THE HOUSEOF TERROR

Move the light halo tofind the correct answer.Try to get out without getting scared!

Enter

1/5

Find the z score for the shaded region under the standard normal distribution.

0.5538

0.6141

-0.5538

Drag the halo of light!

2/5

Find the temperature of a person in the 28th percentile, given that the average temp is 98.6 and standard deviation of 0.7.

98.20

0.72

94.5

3/5

Suppose X~N(86.4, 9.5). Find the 61st percentile value that divides the area under the density curve into 0.61 to the left and 0.39 to the right.

94.5

89.1

4/5

A population of values has a normal distribution with mean 87.7 and std dev 8.8. You intend to draw a random sample of size n=101.

What is the mean of the distribution of sample means?

87.7

0.88

8.8

5/5

A population of values has a normal distribution with mean 87.7 and std dev 8.8. You intend to draw a random sample of size n=101.

What is the standard error of the distribution of sample means?

0.8683

0.08713

0.8756

You have won your fourth stuffed animal

Congratulations!

Try again!

CONGRATULATIONS!

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