Drawing Inferences Statistics

A numerical value that describes a characteristic of the sample.

A branch of mathematics that deals with the systematic collection, organization, presentation, analysis, and interpretation of quantitative data which are collected in a systematic manner.

• Population

• Statistics

• Analysis of Data

• None of the above

This field is concerned with drawing conclusions or generalizations from organized data.

• Sample

• Population

• Inferential

• Descriptive

In a Philippine poll of 1236 adults, 9% said that bad luck happens on Friday the 13th. The 9% is

• a statistic

• a parameter

• the raw data

• the confidence interval

The dot plot shows a random sample of the number of fish caught and released by 30 participants during a two-day fishing tournament. Select the inference that can be made based on the data collected.

• On average, most participants caught and released 5 or more fish.

• More participants caught 6 fish than any other number.

• The same participants who caught and released 1 fish the first day caught and released 1 fish on the second day.

• On average, participants caught and released more fish on Day 2.

A travel club has 3,000 members. A random sample of 50 of the club members found that 12 people like mountain vacations best. Which statement is NOT supported by the sample data?

• Twenty-four percent of those sampled say they like mountain vacations best.

• An estimated 720 club members would likely say they enjoy mountain vacations best.

• Almost one-quarter of club members would likely say they enjoy mountain vacations best.

• More than 2,500 club members would likely say they prefer other vacations over mountain vacations.

What inference can you draw from this survey?

• I can infer that most students in this school like pizza.

• I can infer that very few students like hamburgers.

• I can infer that their favorite is corn dogs.

• I can infer that most students in this school like hamburgers.

Tell if the statement if Descriptive or Inferential

The chances of you getting a new car is about the same as passing your statistics class.

• Descriptive

• Inferential

A prediction has been made that the chance a person will be robbed in a certain city is 15%.

• Inferential

• Descriptive

A middle school has 490 students. Mae surveys a random sample of 60 students and finds that 24 of them have dogs. How many students are likely to have dogs?

• 8 students

• 40 students

• 192 students

• 196 students