Transcript Chapter 10 Jeopardy Review Game

Jeopardy
Confidence
Chi-Squared
Intervals
Hypothesis
Testing
Q $100
Q $100
Q $100
Q $100
Q $100
Q $200
Q $200
Q $200
Q $200
Q $200
Q $300
Q $300
Q $300
Q $300
Q $300
Q $400
Q $400
Q $400
Q $400
Q $400
Q $500
Q $500
Q $500
Q $500
Q $500
Vocabulary Formulas
Final Jeopardy
$100 Question from H1
What is the degree of freedom for the 2-way table below?
Grade in Statistics
A
B
C
D
F
Junior
4
7
3
1
1
Senior
12
13
16
8
5
$100 Answer from H1
4
$200 Question from H1
A
B
C
D
F
Junior
4
7
3
1
1
Senior
12
13
16
8
5
For the 2-way table above, compute the expected number
of students that are seniors and that have a B in statistics.
$200 Answer from H1
15.43
$300 Question from H1
State the HO and HA for this two way table
Grade in Statistics
A
B
C
D
F
Junior
4
7
3
1
1
Senior
12
13
16
8
5
$300 Answer from H1
Ho: There is no connection between grades and year in school
Ha: There is a connection between grades and year in school
$400 Question from H1
Compute the Chi Squared statistic for this 2-way table.
Grade in Statistics
A
B
C
D
F
Junior
4
7
3
1
1
Senior
12
13
16
8
5
$400 Answer from H1
3.087
$100 Question from H2
Find the standard deviation for the following sampling distribution:
200 high school students at Dublin High were sampled
and asked how much money they spent on lunch off campus.
The mean of the sample was $5.25 and the standard deviation was $1.15.
$100 Answer from H2
$0.081
$200 Question from H2
Compute the margin of error (95% confidence
level) for the $100 question.
200 high school students at Dublin High were
sampled and asked how much money they spent on
lunch off campus.
The mean of the sample was $5.25 and the
standard deviation was $1.15.
$200 Answer from H2
$0.159
$300 Question from H2
Compute a 95% confidence interval for the situation
from the $100 question:
200 high school students at Dublin High were sampled and
asked how much money they spent on lunch off campus.
The mean of the sample was $5.25 and the standard deviation was
$1.15.
$300 Answer from H2
($5.09, $5.41)
$400 Question from H2
What is the margin of error for the confidence interval below?
(72.61,79.39)
$400 Answer from H2
$3.39
$100 Question from H3
Write the Ho and Ha for the problem below:
A professional golfer claims that, with her driver,
she can hit the ball an average of 300 yards.
You ask her to hit the ball in the driving range 20 times.
The average distance is 291 yards with
a standard deviation of 16 yards.
  300
  300
$100 Answer from H3
H0: μ = 300
Ha: μ < 300
$200 Question from H3
Compute the standard deviation of the sampling
distribution for the $100 question.
A professional golfer claims that, with her driver,
she can hit the ball an average of 300 yards.
You ask her to hit the ball in the driving range 20 times.
The average distance is 291 yards
with a standard deviation of 16 yards.
$200 Answer from H3
3.58
$300 Question from H3
Make a conclusion about the golfer’s
claim by running the appropriate
hypothesis test
A professional golfer claims that, with her
driver, she can hit the ball an average of
300 yards. You ask her to hit the ball in
the driving range 20 times. The average
distance is 291 yards with a standard
deviation of 16 yards.
$300 Answer from H3
P-value = .0105. Reject Ho in favor of Ha.
The sample does not provide good evidence
that the golfer can hit the ball an average of 300 yards.
$400 Question from H3
A professional golfer claims that, with her driver, she can hit
the ball an average of 300 yards. You ask her to hit the ball
in the driving range 20 times. The average distance is 291
yards with a standard deviation of 16 yards.
Find the minimum distance of the average of 20 drives the
golfer would need to hit in order for you to accept her claim
if you require 5% significance. (assume the standard
deviation is still 16.)
$400 Answer from H3
294 yards
$100 Question from H4
Define the phrase: Margin of error
$100 Answer from H4
Distance from the mean to one end of a confidence interval
$200 Question from H4
Explain Simpson’s Paradox
$200 Answer from H4
An association or comparison that holds for all of
several groups can disappear or reverse direction
when the data are combined to form a single group
$300 Question from H4
Define the phrase: Null Hypothesis
$300 Answer from H4
Statement of no effect or no change
$400 Question from H4
What kind of variables are being
compared in a two-way table?
$400 Answer from H4
Categorical variables
$100 Question from H5
For each question in this category, the name
of a formula used in Chapter 10 will appear.
You need to write the formula.
Margin of error for a sample mean
Z*
s
n
$100 Answer from H5
s
Z*
n
$200 Question from H5
Expected counts in a two-way table
row total  column total
table total
$200 Answer from H5
row total  column total
table total
$300 Question from H5
Z-score formula for a hypothesis test of a sample mean
$300 Answer from H5
z
X 

$400 Question from H5
Confidence interval for a sample mean
$400 Answer from H5
s
X Z*
n
Final Jeopardy
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Final Jeopardy Answer
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