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Statistics: Informed Decisions Using Data | 4th Edition | ISBN: 9780321757272 | Authors: Michael Sullivan, III
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Dissolving Rates of Vitamins A student wanted to know

Chapter 3, Problem 15E

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QUESTION:

Problem 15E

Dissolving Rates of Vitamins A student wanted to know whether Centrum vitamins dissolve faster than the corresponding generic brand. The student used vinegar as a proxy for stomach acid and measured the time (in minutes) it took for a vitamin to completely dissolve. The results are shown next.

Centrum

Generic Brand

2.73

3.07

3.30

3.35

3.12

6.57

6.23

6.17

7.17

5.77

2.95

2.15

2.67

2.80

2.25

6.73

5.78

5.38

5.25

5.55

2.60

2.57

4.02

3.02

2.15

5.50

6.50

7.42

6.47

6.30

3.03

3.53

2.63

2.30

2.73

6.33

7.42

5.57

6.35

5.92

3.92

2.38

3.25

4.00

3.63

5.35

7.25

7.58

6.50

4.97

3.02

4.17

4.33

3.85

2.23

7.13

5.98

6.60

5.03

7.18

Source: Amanda A. Sindewald, student at Joliet Junior College

(a) Draw side-by-side boxplots for each vitamin type.

(b) Which vitamin type has more dispersion?

(c) Which vitamin type appears to dissolve faster?

Questions & Answers

QUESTION:

Problem 15E

Dissolving Rates of Vitamins A student wanted to know whether Centrum vitamins dissolve faster than the corresponding generic brand. The student used vinegar as a proxy for stomach acid and measured the time (in minutes) it took for a vitamin to completely dissolve. The results are shown next.

Centrum

Generic Brand

2.73

3.07

3.30

3.35

3.12

6.57

6.23

6.17

7.17

5.77

2.95

2.15

2.67

2.80

2.25

6.73

5.78

5.38

5.25

5.55

2.60

2.57

4.02

3.02

2.15

5.50

6.50

7.42

6.47

6.30

3.03

3.53

2.63

2.30

2.73

6.33

7.42

5.57

6.35

5.92

3.92

2.38

3.25

4.00

3.63

5.35

7.25

7.58

6.50

4.97

3.02

4.17

4.33

3.85

2.23

7.13

5.98

6.60

5.03

7.18

Source: Amanda A. Sindewald, student at Joliet Junior College

(a) Draw side-by-side boxplots for each vitamin type.

(b) Which vitamin type has more dispersion?

(c) Which vitamin type appears to dissolve faster?

ANSWER:

Solution:

Step 1 of 2:

The data about the results of the experiment is given.

  1. We have to draw a side by side boxplot for each vitamin type.
  2. We have to determine that which vitamin has more dispersion.
  3. We have to determine which vitamin type appears to dissolve faster.

 

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