NEW
Font size
S
M
L
XL
WorksheetsChapter 9: Hypothesis Testing
Total questions: 14
Worksheet time: 52mins
Name
Class
Date
1.
What is the only option for the null hypothesis?
a)
H0 = k
b)
H0 > k
c)
H0 < k
d)
H0 ≠ k
2.
Which of the following is not an option for an alternate hypothesis?
a)
Ha = k
b)
Ha > k
c)
Ha < k
d)
Ha ≠ k
3.
A car manufacturer advertises that its new subcompact models get 47 mpg. If μ is the mileage of these cars, what could be the null and alternate hypothesis if we wanted to check if the car's mpg is overrated?
a)
H0 = 47
Ha = 47
Ha = 47
b)
H0 = 47
Ha < 47
Ha < 47
c)
H0 = 47
Ha > 47
Ha > 47
d)
H0 = 47
Ha ≠ 47
Ha ≠ 47
4.
The weight of the average 6th grade student's backpack (with books in it) is 18.4 lbs. The principal of the school thinks that the backpack does not weight 18.4 lbs. What is the null and alternate hypothesis?
a)
H0 = 18.4
Ha = 18.4
Ha = 18.4
b)
H0 = 18.4
Ha > 18.4
Ha > 18.4
c)
H0 = 18.4
Ha < 18.4
Ha < 18.4
d)
H0 = 18.4
Ha ≠ 18.4
Ha ≠ 18.4
5.
What is the critical value for a left-tailed test with α = 0.05 and n ≥ 30.
a)
z0 = -1.645
b)
z0 = -2.33
c)
z0 = -1.96
d)
z0 = 2.58
6.
What is the critical value for a right-tailed test with α = 0.01 and n ≥ 30.
a)
z0 = -1.645
b)
z0 = 2.33
c)
z0 = -1.96
d)
z0 = 2.58
7.
Given the following information, find the z-value for the sample. (Hint: z = (x-bar - μ)/(σ/√n))
x-bar = 68, μ = 71, σ = 7.5, n = 36
x-bar = 68, μ = 71, σ = 7.5, n = 36
a)
2.40
b)
3.00
c)
2.78
d)
6.90
8.
Given the following scenario, state whether we would fail to reject or reject the null.
a)
Reject H0
b)
Do no reject H0
9.
Given the following scenario, state whether we would fail to reject or reject the null.
a)
Reject H0
b)
Do not reject H0
10.
Given the following scenario, state whether we would fail to reject or reject the null.
a)
Reject H0
b)
Do not reject H0
11.
An Air Force vase mess hall has received a shipment of 10,000 gallon size cams of cherries. The supplier claims that the average amount of liquid is 0.25 gallons per can. A government inspector took a random sample of 100 cans and found that the average liquid content to be 0.28 gallons per can with a standard deviation of 0.10. Does this indicate that the supplier's claim is too low? (Use a 5% level of significance)
a)
Do not reject H0 (z = 3)
b)
Reject H0 (z = 2.56)
c)
Do not reject H0 (z = 3)
d)
Reject H0 (z = 2.56)
12.
When do you use a t-value instead of a z-value?
a)
When n < 30
b)
When n ≥ 30
c)
When all of the planets align
d)
When Ms. O said to
13.
Slab avalanches studied in Canada have an average thickness of μ = 67 cm. The ski patrol at Vail Colorado, is studying slab avalanches in their region. A random sample of 16 avalanches showed that x-bar = 61.8cm and s = 10.6 cm. Assuming the slab thickness is normally distributed, test the claim that the mean slab thickness is the Vail region is different from that in Canada with a level of significance of 1%.
a)
Do not reject H0 (z = -1.96)
b)
Reject H0 (z = -1.57)
c)
Do not reject H0 (z = -1.96)
d)
Reject H0 (z = -1.57)
14.
About 76% of college professors said that if they could pick a career over again, they would choose to be a professor again. A random sample of 59 college professors in Colorado showed that 47 claim they would choose college teaching again. Does this indicate the proportion of professors in Colorado who would choose the career again is greater than the national rate of 76%? Use a 1% level of significance.
a)
Do not reject H0 (z = 0.76)
b)
Reject H0 (z = 1.45)
c)
Do not reject H0 (z = 1.45)
d)
Reject H0 (z = 0.6)
Reset
