Question

Exercise 1.1 1. State whether descriptive or inferential statistics has been used. (a) By 2040 at least 3.5 billion people will run short of water. (b) In a sample of 100 individuals, 36% think that watching television is the best way to spend an evening. (c) In a survey of 1000 adults, 34% said that they posted notes on social media websites . (d) In a poll of 3036 adults, 32% said that they got a flu shot at a retail clinic . (e) Drinking decaffeinated coffee can raise cholesterol levels by 7%. (f) In a survey of 1500 people who gave up driving, the average of the ages at which they quit driving was 85. (g) Experts say that mortgage rates may soon hit bottom. 2. Classifying Data by Type Determine whether the data are qualitative or quantitative. Explain your reasoning. (a) Heights of hot air balloons (b) Carrying capacities of pickups (c) Eye colors of models (d) Student ID numbers (e) Weights of infants at a hospital (f) Species of trees in a forest (g) Responses on an opinion poll (h) Wait times at a grocery store 3. The items below appear on a physician’s intake form. Determine the level of measurement of the data. (a) Temperature (c) Allergies (b) Weight (d) Pain level (scale of 0 to 10) 4. The items below appear on an employment application. Determine the level of measurement of the data. ​

Answer 1

1.

Descriptive statistics.

(b) Descriptive statistics.

(c) Descriptive statistics.

(d) Descriptive statistics.

(e) Inferential statistics.

(f) Descriptive statistics.

(g) Inferential statistics.

2.

(a) Quantitative - heights are measured using numerical values.

(b) Quantitative - carrying capacities are measured using numerical values.

(c) Qualitative - eye colors are categorical in nature.

(d) Qualitative - student ID numbers are categorical in nature.

(e) Quantitative - weights are measured using numerical values.

(f) Qualitative - species of trees are categorical in nature.

(g) Qualitative - responses on an opinion poll are categorical in nature.

(h) Quantitative - wait times are measured using numerical values.

3.

(a) Interval.

(b) Ratio.

(c) Nominal.

(d) Ordinal.

4.

(a) Ordinal.

(b) Ratio.

(c) Nominal.

(d) Interval.

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