Explain the difference between descriptive statistics and inferential statistics.

Writing Assignment I MAT181

DUE (Midterm Exam Day)

For each Chapter, answer each question in your own words using no more than 2-3 properly constructed sentences (correct grammar, punctuation, spelling, etc.).

Be sure to include support for any “choice” answers. Use declarative sentences, citing factual information based on definitions, procedures, etc.

Chapter 1

1. Explain the difference between a population and a sample (from a statistical point of view). (4pts)

2. Explain the difference between quantitative variable and qualitative variable. (4pts)

3. Explain the difference between descriptive statistics and inferential statistics. (4pts)

Chapter 2

1. For a dataset, without constructing of the frequency distribution table; how to obtain the class width of frequency distribution table if the number of classes is given? (2pts)

Note: Use the formula in the slides; here frequency distribution table is not provided.

2. Explain the difference between a frequency distribution table and a relative frequency distribution table (4pts)

Chapter 3

1. Explain the difference between mean and median. Is mean always larger than median? (4pts)

2. Explain the difference between μ and x . How do you determine which is appropriate to use in a problem? (4pts)

3. Explain the difference between σ and s. How do you determine which is appropriate to use in a problem? (4pts)

4. What is the relationship between variance and standard deviation?