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Honors Statistics Test 1 Review Flashcards | StudBud
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Honors Statistics Test 1 Review
Honors Statistics Test 1 Review
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1
The stronger the z-score, the ____________ to 0 it is.
closer away
farther away
2
Which of the following is NOT a term used to describe the shape of a distribution?
Approximately normal
Skewed left
Bimodal
Outlier
3
Which of the following is NOT a quantitative variable?
weight
age
zip code
height
4
P-hat is calculated by...
\frac{\pi}{n}
n/x
x/n
\frac{\pi\left(1-\pi\right)}{n}
5
How do we calculate z-score
(statistic-SD)/mean
(statistic-mean)/SD
(mean-statistic)/SD
(SD-mean)/statistic
6
Choose the statement that is FALSE.
Z-Scores can be negative.
Z-scores are also called standardized statistics.
Z-scores cannot be calculated without a calculator
A Z-score is the # of standard deviations away from the mean.
7
Choose the answer choice that would make the end of this statement FALSE. A p-value...
is used to decide whether or not to reject the null hypothesis
is the probability of getting a test result as extreme as the statistic
can be negative
is used to measure strength
8
If your statistic is .5. What will be your p-value if your alternative hypothesis is \pi>.33
.1
.3
.4
.5
9
If sample size increases, p-value ________________
increases
decreases
10
Suppose we think rock gets thrown less in RPS. What is the alternative hypothesis to test this?
Ha: \pi<.5
Ha: \pi=1/3
Ha: \pi\ne1/3
Ha: \pi<1/3
11
Which of the following can be a null hypothesis?
Ho: \pi=-0.5
Ho=.5
Ho: \pi>0.5
Ho: \pi=0.5
12
The stronger a p-value, the _____________ it is
smaller
larger
13
How do we calculate standard deviation
\sqrt{\frac{\pi\left(1-\pi\right)}{n^2}}
\sqrt{\frac{\pi\left(1-\pi\right)}{n}}
\frac{\pi\left(1-\pi\right)}{n}
\sqrt{\frac{\pi}{n}}
14
If you run a two-sided test, your p-value will be ____________ than a one-sided test
larger
smaller
15
A parameter is...
the mean of your population
A statistic of your sample
a proportion of your sample
A proportion of your population
