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Types of
Samples 2
Z-scores
Standard
Deviation
100
200
300
400
100
200
300
400
100
200
300
400
100
200
300
400
500
500
500
500
Sample vs.
Population
Types of
Samples 1
100
200
300
400
500
Sample vs. Population for 100
Question: Explain the difference
between a sample and a
population.
Check Your Answer
Sample vs. Population for 100
Answer: A sample is just a portion
of the entire population.
Back to the Game Board
Sample vs. Population for 200
Question: Which has a larger
spread: a smaller sample or a bigger
sample?
Check Your Answer
Sample vs. Population for 200
Answer: bigger
Back to the Game Board
Sample vs. Population for 300
Question: The mean of a sample is 5, and the
mean of the population is 7. What is one
possible reason that the means are not the
same?
Check Your Answer
Sample vs. Population for 300
Answer: Answers will vary
Back to the Game Board
Sample vs. Population for 400
Question: Three sample means were
calculated to be: 3.6, 2.1, and 3.0. What is the
best way to find an estimate for the
population mean?
Check Your Answer
Sample vs. Population for 400
Answer: Find the mean of the
sample means.
Back to the Game Board
Sample vs. Population for 500
Question: If the population mean is 7.1, and the
standard deviation is 3, the middle 68% of the data
is between what two numbers?
Check Your Answer
Sample vs. Population for 500
Answer: 4.1 and 10.1
Back to the Game Board
Types of Samples for 100
Question: What are two types of
samples that are biased?
Check Your Answer
Types of Samples for 100
Answer: Self-selected, and
convenience
Back to the Game Board
Types of Samples for 200
Question: What type of sample is the
following scenario?
A poll on which TV show is the
best.
Check Your Answer
Types of Samples for 200
Answer: Self-selected
Back to the Game Board
Types of Samples for 300
Question: What type of sample is the
following scenario?
You want to know the best movie in the
theater so you ask your best friends.
Check Your Answer
Types of Samples for 300
Answer: Convenience
Back to the Game Board
Types of Samples for 400
Question: Is the following sample biased or
unbiased?
Picking a winner using a random number
generator on a calculator.
Check Your Answer
Types of Samples for 400
Answer: unbiased
Back to the Game Board
Types of Samples for 500
Question:What type of sample is the following
scenario?
Jill wants to know if people like the
apple pie at her store so she asks her
customers.
Check Your Answer
Types of Samples for 500
Answer: convenience
Back to the Game Board
Types of Samples 2 for 100
Question: What are the two types
of unbiased samples?
Check Your Answer
Types of Samples 2 for 100
Answer: Systematic and Random
Back to the Game Board
Types of Samples 2 for 200
Question: Is the following sample biased or
unbaised?
I ask every 3rd person my question.
Check Your Answer
Types of Samples 2 for 200
Answer: unbiased
Back to the Game Board
Types of Samples 2 for 300
Question: What type of sample is the following
scenario?
I close my eyes and point to who I will ask my
question.
Check Your Answer
Types of Samples 2 for 300
Answer: random
Back to the Game Board
Types of Samples 2 for 400
Question: Which sample is the most unbiased?
a) Asking your best friends
b) People volunteering their answers
c) Asking every other person
d) Asking the first 5 people in my cell phone.
Check Your Answer
Types of Samples 2 for 400
Answer: c. Asking every other
person
Back to the Game Board
Types of Samples 2 for 500
Question: Create a sample that is selfselected.
Check Your Answer
Types of Samples 2 for 500
Answers will vary.
Back to the Game Board
Z-scores for 100
Question: What is the formula for
finding a z-score?
Check Your Answer
Z-scores for 100
Answer:
xx

Back to the Game Board
Z-scores for 200
Question: Find the z-score for a
value of 94 if the mean is 90 and
the standard deviation is 3.5.
Check Your Answer
Z-scores for 200
Answer: 1.1
Back to the Game Board
Z-scores for 300
Question: Find the probability that a
tree is less than 94 feet tall if the mean
is 90 and the standard deviation is
3.5.
Check Your Answer
Z-scores for 300
Answer: 0.8643
Back to the Game Board
Z-scores for 400
Question: The weights of male monkeys
are normally distributed with a mean of 17
lbs and a std dev of 3. What is the
probability that a monkey is more than 14
lbs?
Check Your Answer
Z-scores for 400
Answer: 0.84
Back to the Game Board
Z-scores for 500
Question: The mean weight of middle
school girls is 125.8 with a std dev of 10.4.
Find the probability that a girl weighs
between 124 and 145.6 lbs.
Check Your Answer
Z-scores for 500
Answer: 0.5506
Back to the Game Board
Standard Deviation for 100
Question: Find the standard
deviation if the mean is 22.3.
22, 18, 19, 25, 27, 21, 24
Check Your Answer
Standard Deviation for 100
Answer: 3
Back to the Game Board
Standard Deviation for 200
Question: Find the standard
deviation if the mean is 6.
4, 4, 5, 5, 5, 6, 6, 7, 7, 7, 8, 8
Check Your Answer
Standard Deviation for 200
Answer: 1.32
Back to the Game Board
Standard Deviation for 300
Question: Find the standard deviation.
Data
5
6
7
8
9
Frequency
15
20
20
15
10
Check Your Answer
Standard Deviation for 300
Answer: 1.29
Back to the Game Board
Standard Deviation for 400
Question: Find the std dev
Data
10
12
13
15
16
Frequency
3
2
5
9
4
Check Your Answer
Standard Deviation for 400
Answer: 1.93
Back to the Game Board
Standard Deviation for 500
Question: If the variance of a data
set is 8.4, what is the standard
deviation?
Check Your Answer
Standard Deviation for 500
Answer: 2.90
Back to the Game Board