Complete the below mcq:
Question 1.1. A standard deviation is a _____.
sample
descriptive statistic
census
inference statistic
Question 2.2. The vertical line to the peak of the bell curve represents the _____.
point estimates
random variables
statistics
mean
Question 3.3. The sampling method in which every item in the population has an equal probability of being selected is called which of the following?
Simple random sampling
Stratified sampling
Systematic sampling
Judgment sampling
Question 4.4. Calculating the average value of five sample measurements of door width is an example of which of the following?
Descriptive statistics
Statistical inference
Predictive statistics
Analytical statistics
Question 5.5. A subset of items selected from a population is called which of the following?
Sample
Statistic
Census
Parameter
Question 6.6. Which of the following tools is used to identify and isolate causes of a problem?
Shewart diagram
Scatter diagram
Cause-and-effect diagram
Histogram
Question 7.7. Poka-yoke means which of the following?
Quality
Fool-proof
Mistake
Tampering
Question 8.8. A tool that helps everyone begin a project with the same understanding is a _____.
Scatter diagram
flow chart
quality circle
pareto chart
Question 9.9. Which of the following pairs of charts are used together?
X-Bar chart and p-chart
R-chart and p-chart
R-chart and s-chart
X-Bar chart and R-chart
Question 10.10. A bank observes that most customer complaints come from only a small subset of its total customer base. This is an example of which of the following?
Clustering analysis
The Pareto principle
Data skewing
The central limit theorem
Question 11.11. Determine the sample standard deviation(s) for the following data: 7, 9, 2, 0, 1, and 5.
s = 2.805
s = 3.266
s = 2.927
s = 3.578
Question 12.12. Six samples of subgroup size 5 (n=5) were collected. Determine the upper control limit (UCL) for an X-Bar chart if the mean of the sample averages is 4.7 and mean of the sample ranges is 0.35.
UCL = 4.86905
UCL = 4.90195
UCL = 4.72250
UCL = 5.05805
Question 13.13. Twenty samples of subgroup size of 5 (n = 5) were collected for a variable measurement. Determine the upper control limit (UCL) for an R-chart if the mean of the sample ranges equals 4.4.
UCL = 9.3060
UCL = 1.4695
UCL = 11.3256
UCL = 8.8176
Essay Questions:
Create a 30 words per essay. NO PLAGIARISM!!!
Question 1.
What are the advantages of studying a sample from the population instead of studying the entire population though a census?
Question 2.
From the standpoint of SPC, what does the standard deviation measure?
Question 3.
What is a judgment sample?
Question 4.
Explain the difference between Type I and Type II errors in the context of a control chart. Why is it important to give operators control over their processes?
Question 5.
What conditions support the use of a control chart for individuals? Discuss any limitations associated with the chart use. Explain the relationship that exists between a histogram and a control chart.