Master Web Analytics Statistics: Descriptive and Inferential Statistics

Question 1

When calculating the central tendency of a dataset with extreme values, which measure is most appropriate?

Accepted Answer

Median

Answer

Mean

Answer

Mode

Answer

Range

Question 2

Which sampling technique is most likely to produce a representative sample of the population?

Accepted Answer

Probability sampling

Answer

Convenience sampling

Answer

Quota sampling

Answer

Snowball sampling

Question 3

To determine if there is a significant difference between two independent groups, which statistical test is used?

Accepted Answer

t-test

Answer

ANOVA

Answer

Chi-square test

Answer

Regression analysis

Question 4

What is the primary purpose of a confidence interval?

Accepted Answer

To estimate the true population mean

Answer

To determine the significance of a statistical test

Answer

To calculate the margin of error for a survey

Answer

To predict future values of a variable

Question 5

Which type of probability distribution is represented by a bell-shaped curve?

Accepted Answer

Normal distribution

Answer

Uniform distribution

Answer

Exponential distribution

Answer

Poisson distribution

Question 6

Distinguish between Type I and Type II errors.

Accepted Answer

Type I errors occur when the null hypothesis is incorrectly rejected, while Type II errors occur when it is incorrectly accepted.

Answer

Type I errors occur when the alternative hypothesis is incorrectly rejected, while Type II errors occur when it is incorrectly accepted.

Answer

Type I errors are more severe than Type II errors.

Answer

Type II errors are more severe than Type I errors.

Question 7

What is the main purpose of a hypothesis test?

Accepted Answer

To determine if there is evidence to support a claim about a population

Answer

To estimate the population mean

Answer

To calculate the confidence interval for a proportion

Answer

To predict the future value of a variable

Question 8

Distinguish between a parameter and a statistic.

Accepted Answer

A parameter is a population characteristic, while a statistic is a sample characteristic.

Answer

A statistic is a population characteristic, while a parameter is a sample characteristic.

Answer

Parameters are always known, while statistics are always estimated.

Answer

Statistics are always known, while parameters are always estimated.

Question 9

Which option is NOT an advantage of utilizing web analytics?

Accepted Answer

Squandering resources

Answer

Enhancing website performance

Answer

Identifying target audiences

Answer

Forecasting customer behavior

Question 10

Which of the following is NOT a measure of central tendency?

Accepted Answer

Standard deviation

Answer

Mean

Answer

Median

Answer

Mode

Question 11

Which of the following is not typically used as a modeling technique in regression analysis for web analytics?

Accepted Answer

Time series analysis

Answer

Linear regression

Answer

Logistic regression

Answer

Decision tree regression

Question 12

The measure of central tendency that is calculated by summing all values in a dataset and dividing by the number of values is:

Accepted Answer

Mean

Answer

Median

Answer

Mode

Answer

Standard deviation

Question 13

A population is defined as:

Accepted Answer

The entire group of interest

Answer

A subset of the entire group of interest

Answer

A group of individuals under investigation

Answer

A group of objects under investigation

Question 14

Which statistical test is specifically designed to compare the means of two different groups?

Accepted Answer

t-test

Answer

Analysis of variance (ANOVA)

Answer

Chi-square test

Answer

Correlation coefficient

Question 15

In hypothesis testing, the p-value represents the probability of:

Accepted Answer

Making a Type 1 error (false positive)

Answer

Making a Type 2 error (false negative)

Answer

Determining the effect size of the result

Answer

Establishing statistical significance

Question 16

Which of the following variable types is both categorical and non-ordinal?

Accepted Answer

Gender

Answer

Age

Answer

Income

Answer

Education level

Question 17

The primary purpose of data normalization in web analytics is to:

Accepted Answer

Ensure consistency in data format for effective analysis

Answer

Eliminate outliers from the dataset

Answer

Enhance data visualization

Answer

Increase the precision of statistical tests

Question 18

Which metric is widely used to measure the engagement of users in social media campaigns?

Accepted Answer

Engagement rate

Answer

Conversion rate

Answer

Bounce rate

Answer

Click-through rate

Question 19

Descriptive statistics primarily focus on:

Accepted Answer

Summarizing and describing data

Answer

Making inferences about a population based on a sample

Answer

Testing statistical hypotheses

Answer

Visualizing data for analysis

Question 20

Confidence intervals in statistics are used to:

Accepted Answer

Estimate a range of values likely to contain the true population parameter

Answer

Determine the exact value of the population parameter

Answer

Test the significance of statistical differences

Answer

Visualize the distribution of data

Question 21

What is the primary purpose of a confidence interval?

Accepted Answer

To estimate a population parameter within a specified range of probability.

Answer

To predict future values with certainty.

Answer

To identify statistically significant differences between groups.

Question 22

Quota sampling is an example of which type of sampling?

Accepted Answer

Non-probability sampling

Answer

Probability sampling

Answer

Random sampling

Answer

Cluster sampling

Question 23

In hypothesis testing, what does the null hypothesis represent?

Accepted Answer

The assumption of no significant difference or relationship between variables.

Answer

The assumption of a significant difference or relationship between variables.

Answer

The hypothesis that is being tested

Question 24

Which of the following is a characteristic of descriptive statistics?

Accepted Answer

Summarizes and describes a data set without making inferences about the population.

Answer

Relies on probability theory to make predictions.

Answer

Requires a large sample size to be accurate.

Answer

Used to test hypotheses about a population.

Question 25

What is the primary purpose of calculating the standard deviation?

Accepted Answer

To measure the dispersion or variability of a data set.

Answer

To determine the probability of an event occurring.

Answer

To find the central tendency of a data set.

Question 26

Which of the following is an example of a nominal level of measurement?

Accepted Answer

Eye color

Answer

Age

Answer

Temperature

Answer

Height

Question 27

How are a population and a sample related in statistical research?

Accepted Answer

A sample is a representative subset of the larger population.

Answer

Samples are more accurate than populations.

Answer

A population is always smaller than a sample.

Question 28

What is a key benefit of using statistics in web analytics?

Accepted Answer

It allows for data-driven decision-making and optimization of digital marketing strategies.

Answer

It eliminates the need for human interpretation of data.

Answer

It simplifies data visualization.