Analyze Phase Test

Z distribution is the simplest normal distribution with the mean equal to ______ and standard deviation equal to ________?

A t-test is a hypothesis test in which the test statistic follows the Student’s t distribution if the null hypothesis is true?

In which condition should you fail to reject the null hypothesis?

Inferential statistics is descriptive only and does not make any generalizations beyond the data at hand?

Which hypothesis test would be the most appropriate to compare the means of 2 samples

Which hypothesis test would be the most appropriate to compare the mean of a sample to a target value

Which hypothesis test would be the most appropriate to compare the median of 2 samples

One sample t-test is a hypothesis test to study whether there is a statistically significant difference between a population mean and a specified value or target?

One-tailed 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?

One-way ANOVA (one-way analysis of variance) is a statistical method to compare means of two or more populations?

One-way ANOVA (one-way analysis of variance) is a statistical method to compare variances of two or more populations?

Which of the following would not be considered an example of graphical analysis?

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.

The higher the confidence level, the wider the confidence interval?

The more variability, the wider the confidence interval?

The null hypothesis for a normality test is that the data are normally distributed?

The null hypothesis for a Paired t-test is: MuA – MuB = 0

The proportion of the area under the sampling distribution and beyond the test statistic is p-value?

To reduce β risk, we decrease the sample size?

Which hypothesis test is used to check whether the population of our interest is normally distributed?

Which is NOT an assumption of a one-way ANOVA?

Which of the following is NOT a goal of rational subgrouping?

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?

Which of these would you reject the null hypothesis?

α risk is the risk of making a Type I error?

Which distribution has mean equal to np and the variance equal to np(1-p)?

Mann-Whitney test is a statistical hypothesis test to compare the _______of two populations which are not normally distributed?

When the p-value is _____ than the α level, we reject the null and claim that there is a statistically significant difference between different groups?

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?

________ is a continuous probability distribution which arises in the analysis of variance or test of equality between two variances?

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?

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?

Statistical inference is the process of making inferences regarding the characteristics of an unobservable population based on the characteristics of the observed sample?

The process of selecting a subset of observations within a population is referred to as sampling?

The _______ is used to visualize sources of variation

_________ is applied to infer the characteristics or relationships of the populations from which the data are collected?

The probability of a continuous variable falling within a particular region is the integral of the _________ over the region?

If the p-value is less than 0.05 what is the general rule?

Which is not indicative of statistical inference

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?

A skewness of 2,3453 can imply what?

A kurtosis of -1,2754 indicates?

Hypothesis testing can help establish a statistical difference among factors in data sets?

A two-sample T-test does which of the following?

Which of the following is TRUE about Type I and Type II errors?

What are confidence intervals (CI)?

The Central Limit Theorem says that…

What test is used with an attribute Y and 3 X’s?

What test should be used when comparing the average height of people from 2 different countries?

Which test should be used to compare the average results of 7 different Green Belt classes?

When is the F-test NOT used?

Hypothesis testing can help us…

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 critical-T value for a 2-sided test as required in this case:

If a hypothesis test shows a p-value 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?

Every hypothesis test must have the following except?

The Mann-Whitney test focuses on what?

Which tool is used to compare more than two sample proportions with each other?