just watch the graph then help me answer them 1. a.How many people were surveyed
ID: 3275907 • Letter: J
Question
just watch the graph then help me answer them
1.
a.How many people were surveyed? _______________
b.What are the lower and upper class limits of the first class? _______________
c.How many people are in the class with a class mark of 32? _______________
d.What is the class mark of the modal class?
2.
a.What are the lower and upper class limits of the first class? _______________
b.How many people were aged 30 – 35? _______________
c.What percent of people were aged 35 – 40? _______________
d.How many people were at least 40 years old?
3.
a.Half of the visitors were older than what age? _______________
b.About what percent of visitors were older than 38.75? _______________
c.About what percent of visitors were younger than 25? _______________
d.How old was the oldest visitor?
project1 graph4 8 7 4 4 3- 0 20 24. 28 32 36 40 48 Age xu liuExplanation / Answer
Answers with explanations to your questions:
1.
a. No. of people surveyed = 3+8+4+7+7+5+4+2 = 40
b. Lower and upper class limit of 1st class are 18 and 22 respectively
c. Class marked 32 has 7 people
d. Class mark of the modal mark: 24
2.
a.First class' upper and lower class are 20 to 25
b. 0 people in the aged 30-35
c. 0 people and hence 0% of people were aged 35-40
d. 49 people, just add up all numbers from class mark 40 and upwards
3.
a. Median is the 50% percentile marker. So, Look at Descriptive Statistics:Age and see median in that
It is 31.50. So, 50 percent of visitors ( or half of visitors) were older than 31.50
b. Q3 is 38.75. So 75 percent of the visitors were younger than 38.75
c. Q1 is 25. So, 25 percent ( as Q1 is 25th percentile) of visitors are younger than 25 years
d. Check Max value of the descriptive statistics, it' 47. So the oldest visitor was 47 years
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