# Questions Based on Histogram

A nurse measured the blood pressure of each person who visited her clinic. Following is a relative-frequency histogram for the systolic blood pressure readings for those people aged between 25 and 40. Use the histogram to answer the questions below. The blood pressure readings were given to the nearest whole number.

1. Approximately what percentage of the people aged 25-40 had a systolic blood pressure reading between 110 and 119 inclusive?

2. Approximately what percentage of the people aged 25-40 had a systolic blood pressure reading between 110 and 139 inclusive?

3. What common class width was used to construct the frequency distribution?

4. Identify the center of the third class.

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• Relative Frequency Hisotogram.doc
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Elisabeth Nicholson, PhD (IP)

Rating 4.9/5

Active since 2006

BA in Anthropology and Mathematics, Barnard College, Columbia University
PhD in Evolutionary Biology, Northwestern University

Responses 944 | eBooks 2

"In your opinion, how long should the summary be?"

"Ok, here goes the re-write as per your suggestion: OLD:This is important to know and will require further research because the same occurrences in the Carver study does have a correlation between those who must have an HR degree in contrast who those with non-HR degree versus those with a professional certification in HR. The new re-write ::This is important to know and will require further research because the same occurrences in the Carver study does have a correlation between those who must have an HR degree to practice than for those with a non-HR degree who can still make a impact.:: You thoughts??"

"Hi Elisabeth, Thank you so much for your help! I was looking for help though with the manual calculations of the part below though so I would know how to do this problem, and cannot turn in my assignment with an online calculator used for the part below. Could you possibly answer the question below without the online calculator? We have to show our work. Thank you! A calculator to automatically solve these probabilities is here: http://www.vassarstats.net/textbook/ch5apx.html Fill in the table on that website with N = 4 and p = 0.5. Change the value of k to e 0, 1, 2, 3, and 4 to find the theoretical probabilities for each possible number of heads. They are: a. Zero Heads = 0.0625 = 6.25% b. One Head = 0.25 = 25% c. Two Heads = 0.375 = 37.5% d. Three Heads = 0.25 = 25% e. Four Heads = 0.0625 = 6.25%"

"Hi Nicole, I have chapter 2 (roughly about 20 pages) for editing, i.e., punctuation etc for your review. Are you still editing? Please advise."

Extracted Content from Question Files:

• Relative Frequency Hisotogram.doc

A nurse measured the blood pressure of each person who visited her clinic. Following is a
relative-frequency histogram for the systolic blood pressure readings for those people aged
between 25 and 40. Use the histogram to answer the questions below. The blood pressure
readings were given to the nearest whole number.

Approximately what percentage of the people aged 25-40 had a systolic ______
blood pressure reading between 110 and 119 inclusive?
A) 3.5%
B) 0.35%
C) 35%
D) 30%
Approximately what percentage of the people aged 25-40 had a systolic blood ______
pressure reading between 110 and 139 inclusive?
A) 74%
B) 59%
C) 89%
D) 39%
What common class width was used to construct the frequency distribution? ______
A) 100
B) 9
C) 11
D) 10
Identify the center of the third class. ______
A) 130
B) 125
C) 120
D) 124