Math 102 Practice Test 2 Answer Key
Multiple Choice:
1.
7.
a.
a.
2.
8.
b.
d.
3.
9.
c.
c.
4.
10.
b.
d.
5.
11.
c.
a.
6.
12.
b.
d.
Short Answer:
1.
2.
116
5
5
3
5
= 2 ; = 6 2 3 = 2. Equation is = 2
53
5
5
11
8 = ( 1) or = + .
2
2
2
2
2
16
4 = 5 ( + 2) or =
Math 102 Practice Test 2
Multiple Choice Circle the MOST Correct Answer (10 Questions 4 pts Each 40 pts Total)
1.
2.
Which of the following is the midpoint of (4,3) and (2, 1)?
(3,1)
(2,4)
(1,2)
a.
b.
c.
4.
5.
6.
7.
8.
12.
c.
28
d.
28
= +
origin.
d.
BOT
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Math 222 Worksheet: Type 1 and Type 2 Errors
Directions: Find the values for the Type 1 Error, Type 2 Errors, and Power.
1. A researcher reports that the average salary of assistant professors is more than
$42,000. A sample of 30 assistant professor
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Math 222 Worksheet: Additional p-value practice problems using a level of signicance.
Directions: For each problem answer the following (a) State Ho and Ha (b) Compute the test value (c)
Draw the Ho curve and shade the P-value (d) Find the P-value (
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Math 222 Worksheet: P-value and rules for rejecting Ho .
Directions: For each problem (a) Sketch the curve (b) Shade the critical region based on (c) Find the
magic number(s) for rejecting the Ho (d) Give the summary for rejecting Ho in terms of z a
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Math 222 Worksheet: Beginning P -value problems
Directions: State Ho and Ha , and then nd the P -value.
1. A researcher reports that the average salary of assistant professors is more than
$42,000. A sample of 30 assistant professors has a mean sala
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Math 222 Worksheet: Beginning P -value problems with signicance level
Directions: Using the same problems from the previous worksheet, formally accept or reject Ho based on
the given level of .
1. A researcher reports that the average salary of assi
State Ho and Ha
1. A researcher thinks that if expectant mothers use vitamin pills, the
birth weight of the babies will increase. The average birth weight of
the population is 8.6 pounds.
2. An engineer hypothesizes that the mean number of defects can be
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Math 222 Worksheet: Central Limit Theorem
1. The weights of the eggs produced by a certain breed of hen are normally distributed
with mean 65 grams and standard deviation of 5 grams.
(a) What is the probability that one egg selected at random from a
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Math 222 Worksheet: Condence Intervals and Margin of Error
1. The U.S. Department of Agriculture reports that the mean American consumption
of carbonated beverages per year is greater than 52 gallons. A random sample of 30
Americans yielded a sample
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Math 222 Normal Curve Worksheet
For each problem: (1) Draw the normal curve (2) Find the z -score of the given data point x (3) Draw the
standardized curve N (0, 1) and shade the corresponding area of interest (4) List the calculator commands
under
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Math 222 Excel Activity: 68 85 99.7 Rule
An experiment was conducted measuring how long it took one-hundred dierent cars to accelerate to
60mph. With the given results, answer the following questions with the help of excel:
<6 sec: 5, 5.3, 5.4, 5.4,
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Math 222 Worksheet: z -score
Directions: For each problem, draw a quick sketch of the normal curve (with the mean labeled) and
shade the area that is requested.
The distribution of the scores on the Wechsler Adult Intelligence Scale are approximatel
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Math 222 Worksheet: Histograms
1. List the actual classes that would be used in these cases:
(a) Number of hours a dog sleeps per day: In a sample of 25 dogs it was found that
the least amount of sleep noted was 4 hours and the most amount of sleep
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Math 222 Worksheet: Linear Regression
1. Weight of a Car: MPG Do heavier cars really use more gas? Suppose that a car is chosen at random.
Let x be the weight of the car, and let y be the miles per gallon (mpg).
Weight x
MPG y
2700
30
4400
19
3200
2
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Statistics Review Sheet
1. Evaluate the following:
(a) x2 + 3 ; x = 4
(c) 2x2 ; x = 1
(e) (x 2y 2 )2 ; x = 5, y = 1
(b) x2 ; x = 2
(d) (2x)2 ; x = 1
2. Using y = mx + b, and given m = 0.25 and b = 1.75, nd the value for y :
(a) when x = 5
(b) when x
James McMillan April 21, 2008 Math 105A Navier- Stokes Equation, the Million dollar Question. Have you ever been in an airplane while it hit turbulence and you are force to be shaken around uncontrollably, what about drifting in a boat over a seeming
James McMillan April 23, 2008 Math 105a Final Reaction Paper Against School, by John Taylor Gatto
This article by John Gatto, discusses mostly the negatives about modern education practices and how they are harming our country as a whole, starting w