PR2-2Q-Q#3-Descriptive and Inferential Statistics

What is the formula to calculate the mean of a set of numbers?

• Multiplying all numbers together

• Sum of all numbers divided by the total count of numbers

• Dividing the largest number by the smallest number

• Adding all numbers together

Which measure of central tendency is not affected by extreme values in a data set?

• range

• mode

• median

• mean

What does the standard deviation measure in a data set?

• Mean or average

• Mode or most frequent value

• Variation or dispersion

• Median or middle value

What is the difference between inferential and descriptive statistics?

• Inferential statistics involves making inferences or predictions about a population based on a sample, while descriptive statistics simply describe or summarize data.

• Inferential statistics involves analyzing individual data points, while descriptive statistics involves analyzing overall trends.

• Descriptive statistics is used for qualitative data, while inferential statistics is used for quantitative data.

• Inferential statistics is used for historical data, while descriptive statistics is used for future predictions.

Give an example of a parametric test used in research statistics.

• t-test

• Chi-squared test

• ANOVA

• Mann-Whitney U test

What is the purpose of using non-parametric tests in research statistics?

• To analyze data that does not meet the assumptions of parametric tests

• To analyze data that meets the assumptions of parametric tests

• To make the research results more complicated

• To simplify the statistical analysis process

Calculate the mean of the following set of numbers: 10, 15, 20, 25, 30.

• 15

• 25

• 20

• 35

Which statistical tool is used to measure the variability or dispersion of a data set?

• Standard deviation

• Mean

• Mode

• Median

Explain the concept of mode in statistics.

• The mode is the average of all the values in a data set.

• The mode is the value that appears most frequently in a data set.

• The mode is the highest value in a data set.

• The mode is the lowest value in a data set.

What is the main difference between median and mode?

• Median is the average value, while mode is the sum of all values.

• Median is the range of values, while mode is the middle value.

• Median is the highest value, while mode is the lowest value.

• Median is the middle value, while mode is the most frequent value.