WorksheetsPengujian Hipotesis 1
Total questions: 20
Worksheet time: 33mins
Suppose the P-value for a hypothesis test is 0.0304. Using a = 0.05, what is the appropriate conclusion?
a) Reject the null hypothesis
b) Reject the alternative hypothesis
c) Fail to reject the null hypothesis
d) Fail to reject the alternative hypothesis
When p-value is greater than alpha we:
Reject Ho
Fail to reject Ha
Fail to reject Ho
Reject Ha
When all of the data normally distributed
When sig. alpha = 5%
A __________ occurs if you accept the null hypothesis when it is false.
Type I error
Type II error
A __________ occurs if you reject the null hypothesis when it is true.
Type I error
Type II error
What is the 5 steps procedure for hypothesis testing?
1) State the hypotheses and identify the claim
2) Find the critical value
3) Compute the test value
4) Summarize the results
5) Make the decision (reject or not reject)
1) State the hypotheses and identify the claim
2) Compute the test value
3) Find the critical value
4) Make the decision (reject or not reject)
5) Summarize the results
1) State the hypotheses and identify the claim
2) Find the critical value
3) Compute the test value
4) Make the decision (reject or not reject)
5) Summarize the results
A manufacturer claims that his tires last at least 40,000
miles. A test on 25 tires reveals that the mean life of a tire
is 39,750 miles, with a standard deviation of 387 miles.
Test the Manufacturer’s claim at α = .01.
Reject Ho
Reject Ha
Fail to reject Ho
Fail to reject Ha
In performing a hypothesis test where the null
hypothesis is that the μ = 6.9. A random sample of 16
items is selected. The sample mean is 7.1 and the sample
standard deviation is 2.4. It can be assumed that the
population is normally distributed at α = .05.
Reject Ho
Reject Ha
Fail to reject Ho
Fail to reject Ha
A fast food outlet claims that the mean waiting time in
line is less than 1.9 minutes. A random sample of 20
customers has a mean of 1.7 minutes with a standard
deviation of 0.8 minute. If α = 0.05, test the fast food
outlet's claim using P-values.
Reject Ho
Reject Ha
Fail to reject Ho
Fail to reject Ha
A fast food outlet claims that the mean waiting time in
line is less than 3.5 minutes. A random sample of 20
customers has a mean of 3.7 minutes with a standard
deviation of 0.8 minute. If α = 0.05, test the fast food
outlet's claim.
Reject Ho
Reject Ha
Fail to reject Ho
Fail to reject Ha
Heathrow Airport provides a car parking lot where people can wait to pick up arriving passengers. To decide if the car lot has enough parking places, the airport parking manager needs to know if the mean time in the lot is more than 16 minutes. A sample of 12 recent customers showed they were in the lot for the following lengths of time (in minutes): 10, 12, 15, 11, 18, 22, 14, 11, 19, 20, 24, & 17.
The manager feels that the mean time in the lot is more than 16 minutes.
One sample hypothesis testing with σ known
Two sample hypothesis testing with σ known
One sample hypothesis testing with σ unknown
One sample hypothesis testing with σ unknown
All answer are wrong
Kapan kita memilih t statistik?
Kalau varian populasi diketahui
kalau varian populasi tidak diketahui
kalau standar deviasi sample tidak diketahui
kalau degree of fredom diketahui
kalau standar deviasi unknown
Berapakah nilai z untuk α 5%?
95%
0,4750
0,0199
1,96
1,05
Berapakah nilai t table
n = 20
α = 0,01
σ = 0,5
one tailed test
2,539
2,528
2,845
2,861
1,325
Suatu hipotesis null menyatakan = 200 unit.
Apakah rata-rata dari 50 sample sebesar 203,5, dengan σ=16, masih sesuai dengan hipotesis tersebut?
Hypothesis null masih diterima
Hipotesis null ditolak
Hipotesis tidak berlaku karena missing apha
Hipotesis alternate diterima
Ha = 18.4
Ha > 18.4
Ha < 18.4
Ha ≠ 18.4
