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Sia

w44225592785's Question
Math
Posted 5 months ago

The envelopes of letters received by an office one morning were measured.
The widths (in centimetres) were as follows:
\begin{tabular}{ccccc}
11.8 & 10.3 & 20.5 & 15.4 & 19.2 \\
15.0 & 20.7 & 12.8 & 9.7 & 18.9 \\
21.4 & 6.1 & 15.9 & 12.2 & 20.6 \\
7.9 & 15.0 & 11.3 & 10.0 & 16.1
\end{tabular}
\begin{tabular}{|c|c|c|}
\hline Width & Tally & Frequency \\
\hline 5w<105 \leq w<10 & & \square \\
\hline 10w<1510 \leq w<15 & & \square \\
\hline 15w<2015 \leq w<20 & & \square \\
\hline 20w<2520 \leq w<25 & & \square \\
\hline
\end{tabular}

Click the tally column to tally off the data and complete the frequency table.
(You can click the numbers above as you tally them to cross them off.)
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Answer from Sia
Posted 5 months ago
Solution by Steps
step 1
First, we need to categorize the widths of the envelopes into the specified ranges: 5w<105 \leq w < 10, 10w<1510 \leq w < 15, 15w<2015 \leq w < 20, and 20w<2520 \leq w < 25
step 2
Next, we will count how many widths fall into each category based on the provided list of widths: 11.8, 10.3, 20.5, 15.4, 19.2, 15.0, 20.7, 12.8, 9.7, 18.9, 21.4, 6.1, 15.9, 12.2, 20.6, 7.9, 15.0, 11.3, 10.0, 16.1
step 3
The counts for each range are as follows: - For 5w<105 \leq w < 10: 1 (6.1) - For 10w<1510 \leq w < 15: 6 (11.8, 10.3, 15.4, 12.8, 9.7, 15.0, 11.3, 10.0) - For 15w<2015 \leq w < 20: 7 (15.4, 19.2, 15.0, 15.9, 12.2, 16.1) - For 20w<2520 \leq w < 25: 5 (20.5, 20.7, 21.4, 20.6)
step 4
Finally, we can fill in the frequency table with the counts obtained: - 5w<105 \leq w < 10: 1 - 10w<1510 \leq w < 15: 8 - 15w<2015 \leq w < 20: 7 - 20w<2520 \leq w < 25: 4
Answer
Frequency counts for each width range are: - 5w<105 \leq w < 10: 1 - 10w<1510 \leq w < 15: 8 - 15w<2015 \leq w < 20: 7 - 20w<2520 \leq w < 25: 4
Key Concept
Frequency distribution helps in organizing data into specified ranges for better analysis.
Explanation
The frequency table summarizes how many envelopes fall into each width category, providing a clear view of the data distribution.

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