Analyze Phase Test
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Question 1 of 57
1. Question
Z distribution is the simplest normal distribution with the mean equal to ______ and standard deviation equal to ________?
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Question 2 of 57
2. Question
A ttest is a hypothesis test in which the test statistic follows the Student’s t distribution if the null hypothesis is true?
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Question 3 of 57
3. Question
In which condition should you fail to reject the null hypothesis?
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Question 4 of 57
4. Question
Inferential statistics is descriptive only and does not make any generalizations beyond the data at hand?
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Question 5 of 57
5. Question
Which hypothesis test would be the most appropriate to compare the means of 2 samples
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Question 6 of 57
6. Question
Which hypothesis test would be the most appropriate to compare the mean of a sample to a target value
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Question 7 of 57
7. Question
Which hypothesis test would be the most appropriate to compare the median of 2 samples
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Question 8 of 57
8. Question
One sample ttest is a hypothesis test to study whether there is a statistically significant difference between a population mean and a specified value or target?
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Question 9 of 57
9. Question
Onetailed hypothesis test is used when we care about whether there is a difference between groups and we don’t care about the direction of the difference?
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Question 10 of 57
10. Question
Oneway ANOVA (oneway analysis of variance) is a statistical method to compare means of two or more populations?
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Question 11 of 57
11. Question
Oneway ANOVA (oneway analysis of variance) is a statistical method to compare variances of two or more populations?
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Question 12 of 57
12. Question
Which of the following would not be considered an example of graphical analysis?
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Question 13 of 57
13. Question
The Exponential distribution is very similar to the Poisson distribution except that the Exponential is built on continuous variables and the Poisson is built on discrete variables.
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Question 14 of 57
14. Question
The higher the confidence level, the wider the confidence interval?
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Question 15 of 57
15. Question
The more variability, the wider the confidence interval?
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Question 16 of 57
16. Question
The null hypothesis for a normality test is that the data are normally distributed?
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Question 17 of 57
17. Question
The null hypothesis for a Paired ttest is: MuA – MuB = 0
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Question 18 of 57
18. Question
The proportion of the area under the sampling distribution and beyond the test statistic is pvalue?
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Question 19 of 57
19. Question
To reduce β risk, we decrease the sample size?
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Question 20 of 57
20. Question
Which hypothesis test is used to check whether the population of our interest is normally distributed?
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Question 21 of 57
21. Question
Which is NOT an assumption of a oneway ANOVA?
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Question 22 of 57
22. Question
Which of the following is NOT a goal of rational subgrouping?
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Question 23 of 57
23. Question
Which of the following tests would you use to determine if there is a statistically significant difference between a population mean and a specified value?
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Question 24 of 57
24. Question
Which of these would you reject the null hypothesis?
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Question 25 of 57
25. Question
α risk is the risk of making a Type I error?
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Question 26 of 57
26. Question
Which distribution has mean equal to np and the variance equal to np(1p)?
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Question 27 of 57
27. Question
MannWhitney test is a statistical hypothesis test to compare the _______of two populations which are not normally distributed?
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Question 28 of 57
28. Question
When the pvalue is _____ than the α level, we reject the null and claim that there is a statistically significant difference between different groups?
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Question 29 of 57
29. Question
A _________ test is a statistical method in which a specific hypothesis is formulated about the population, and the decision of whether to reject the hypothesis is made based on sample data?
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Question 30 of 57
30. Question
________ is a continuous probability distribution which arises in the analysis of variance or test of equality between two variances?
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Question 31 of 57
31. Question
The _________ distribution is a discrete probability distribution describing the probability of several events occurring at a known average rate and in a fixed period of time?
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Question 32 of 57
32. Question
A population is grouped into distinct and independent categories and then samples are randomly or systematically selected in each category of the population. Which sampling strategy is it?
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Question 33 of 57
33. Question
Statistical inference is the process of making inferences regarding the characteristics of an unobservable population based on the characteristics of the observed sample?
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Question 34 of 57
34. Question
The process of selecting a subset of observations within a population is referred to as sampling?
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Question 35 of 57
35. Question
The _______ is used to visualize sources of variation
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Question 36 of 57
36. Question
_________ is applied to infer the characteristics or relationships of the populations from which the data are collected?
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Question 37 of 57
37. Question
The probability of a continuous variable falling within a particular region is the integral of the _________ over the region?
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Question 38 of 57
38. Question
If the pvalue is less than 0.05 what is the general rule?
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Question 39 of 57
39. Question
Which is not indicative of statistical inference
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Question 40 of 57
40. Question
The population used in statistics is defined as a sample large enough that you can analyze it and draw conclusions as to all the data?
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Question 41 of 57
41. Question
A skewness of 2,3453 can imply what?
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Question 42 of 57
42. Question
A kurtosis of 1,2754 indicates?
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Question 43 of 57
43. Question
Hypothesis testing can help establish a statistical difference among factors in data sets?
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Question 44 of 57
44. Question
A twosample Ttest does which of the following?
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Question 45 of 57
45. Question
Which of the following is TRUE about Type I and Type II errors?
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Question 46 of 57
46. Question
What are confidence intervals (CI)?
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Question 47 of 57
47. Question
The Central Limit Theorem says that…
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Question 48 of 57
48. Question
What test is used with an attribute Y and 3 X’s?
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Question 49 of 57
49. Question
What test should be used when comparing the average height of people from 2 different countries?
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Question 50 of 57
50. Question
Which test should be used to compare the average results of 7 different Green Belt classes?
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Question 51 of 57
51. Question
When is the Ftest NOT used?
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Question 52 of 57
52. Question
Hypothesis testing can help us…
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Question 53 of 57
53. Question
A department has a hypothesis that its sales average is $17,200 per month. A sample report of 11 months shows a mean of $16,221. The standard deviation is $3,996. Using an alpha level of 5% and degrees of freedom (DF), what is the criticalT value for a 2sided test as required in this case:
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Question 54 of 57
54. Question
If a hypothesis test shows a pvalue of 0.28, but we see a practical difference, what could be a reason for failing to reject the null when there may be a difference?
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Question 55 of 57
55. Question
Every hypothesis test must have the following except?
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Question 56 of 57
56. Question
The MannWhitney test focuses on what?
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Question 57 of 57
57. Question
Which tool is used to compare more than two sample proportions with each other?
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