WorksheetsAP Stats Units 1-8 Review
Total questions: 10
Worksheet time: 14mins
Name
Class
Date
1.
You reject the Ha when
a)
The test statistic is less than a positive critical value
b)
The test statistics is greater than a negative critical value
c)
the p-value is greater than α
d)
never
2.
Given the probability of A and the probability of B, what is the formula for the probability of either occuring?
a)
P(A) x P(B)
b)
P(A) + P(B)
c)
P(A) + P(B) - P(A and B)
d)
P(A and B)/P(B)
3.
What value will always fall in the middle of a 1-sample z confidence interval?
a)
μ
b)
x̄
c)
σ
d)
standard error
4.
What condition must be met in order to complete proportion testing?
a)
n ≥ 30
b)
np and nq both ≥10
c)
p' > .5
d)
none of the above
5.
You reject the H0 when
a)
p-value < α
b)
test statistic < negative critical value
c)
test statistic > positive critical value
d)
all of the above
6.
What would be the effect on the calculated sample size if the α level increases?
a)
increase
b)
decrease
c)
remains the same
d)
not enough info to determine
7.
What is the standard error of a 99% confidence interval produced to estimate the population proportion for a sample of size 50 that produced 23 successes?
a)
.070
b)
.005
c)
.138
d)
.181
8.
What is the symbol for the correlation coefficient?
a)
r
b)
r2
c)
y-hat
d)
cc
9.
Interpret the slope of a regression line with the equation
y-hat = 4.5 + .35x
y-hat = 4.5 + .35x
a)
For every additional x, the y will increase by 4.5
b)
For every additional x, the y will increase by .35
c)
For every additional x, the y is predicted to increase by .35
d)
35% of the change in y can be explained by the change in x
10.
The average score on the unit 8 test is 79.4 with a standard deviation of 6.5. Assuming that unit 8 test scores are normally distributed, determine the probability that a randomly selected student scores above 90 on the test.
a)
.9484
b)
.0516
c)
.05
d)
reject the H0
100 %
