Question

Luka and Anja each measured the height of their friend three times. Their friend is 59 inches tall. They recorded their measurements as shown. Luka: 5

Measurement
ANSWERED
asked 2020-12-15
Luka and Anja each measured the height of their friend three times. Their friend is 59 inches tall. They recorded their measurements as shown. Luka: 59 in., 58, in., 58 in. Anja: 59.3 in., 59.6 in., 58.2 in. Which statement is true?
Luka’s measurements are more precise and more accurate. Anja’s measurements are more precise and more accurate. Luka’s measurements are more precise, but Anja’s measurements are more accurate. Luka’s measurements are more accurate, but Anja’s measurements are more precise

Answers (1)

2020-12-16

Step 1
Define accuracy and precision of values.
An accurate value is judged to be closer to true to value, whereas precision is the consistency between values obtained by repeated measurements.
Here, Luka's measurements are 59 in,58 in, 58 in and Anja's measurements are 59.3 in, 59.6 in,58.2 in
Step 2
The average of Luka's measurements is,
\(A=\frac{59+58+58}{3}=58.33\)in.
The average of Anja's measurements is,
\(A=\frac{59.3+59.6+58.2}{3}=59.03\)in.
The Anja's measurements are more close towards true value. Thus, it is more accurate.
The recordings of Luka is more precise, because the degree of closeness is high compared to Anja.
Therefore, Option (C) is correct.

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