Industrial Statistics
This quiz covers various concepts related to Industrial Statistics, including probability distributions, sampling, hypothesis testing, and quality control.
Questions
What is the probability of obtaining a defective item from a production process if the probability of a non-defective item is 0.9?
- 0.1
- 0.2
- 0.3
- 0.4
In a random sample of 100 items, 20 are found to be defective. What is the sample proportion of defective items?
- 0.1
- 0.2
- 0.3
- 0.4
A company claims that their product has a mean lifespan of 1000 hours. A sample of 50 products is tested and the sample mean lifespan is found to be 950 hours. If the population standard deviation is known to be 100 hours, what is the p-value for the hypothesis test that the population mean lifespan is equal to 1000 hours?
- 0.01
- 0.05
- 0.10
- 0.15
A company uses a control chart to monitor the quality of their products. The control limits are set at 3 standard deviations above and below the mean. If the sample mean is 100 and the sample standard deviation is 10, what are the control limits?
- (70, 130)
- (80, 120)
- (90, 110)
- (100, 140)
Which of the following is a non-parametric test?
- t-test
- ANOVA
- chi-square test
- F-test
What is the probability of obtaining a head when flipping a fair coin?
- 0.25
- 0.5
- 0.75
- 1
In a random sample of 1000 people, 450 are found to be male. What is the sample proportion of males?
- 0.45
- 0.5
- 0.55
- 0.6
A company claims that their product has a mean lifespan of 500 hours. A sample of 100 products is tested and the sample mean lifespan is found to be 480 hours. If the population standard deviation is known to be 50 hours, what is the p-value for the hypothesis test that the population mean lifespan is equal to 500 hours?
- 0.01
- 0.05
- 0.10
- 0.15
A company uses a control chart to monitor the quality of their products. The control limits are set at 2 standard deviations above and below the mean. If the sample mean is 100 and the sample standard deviation is 10, what are the control limits?
- (80, 120)
- (90, 110)
- (100, 140)
- (110, 130)
Which of the following is a parametric test?
- t-test
- ANOVA
- chi-square test
- F-test
What is the probability of obtaining a 6 when rolling a fair die?
- 1/6
- 1/5
- 1/4
- 1/3
In a random sample of 500 people, 250 are found to be female. What is the sample proportion of females?
- 0.25
- 0.5
- 0.75
- 1
A company claims that their product has a mean lifespan of 1000 hours. A sample of 50 products is tested and the sample mean lifespan is found to be 900 hours. If the population standard deviation is known to be 100 hours, what is the p-value for the hypothesis test that the population mean lifespan is equal to 1000 hours?
- 0.01
- 0.05
- 0.10
- 0.15
A company uses a control chart to monitor the quality of their products. The control limits are set at 4 standard deviations above and below the mean. If the sample mean is 100 and the sample standard deviation is 10, what are the control limits?
- (60, 140)
- (70, 130)
- (80, 120)
- (90, 110)
Which of the following is a non-parametric test?
- t-test
- ANOVA
- chi-square test
- F-test