3) Do people drive more slowly on tree-lined street? In the following table x is a random variable representing the number of tree per mile of road on randomly selected streets with a 25 mph speed limit in a major city while y represents the average speed of cars in mph sampled over a one-hour period at the same time of day 47 25 12 30 me to nuo 35 y 25 50 44 45

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3) Do people drive more slowly on tree-lined street? In the following table x is a random
variable representing the number of tree per mile of road on randomly selected streets with a
25 mph speed limit in a major city while y represents the average speed of cars in mph sampled
over a one-hour period at the same time of day
47
25
12
30
me to que
35
y
25
50
44
45
ent brit (d
a) Draw a Scatter Plot Diagram of the data. Remember to label the axes appropriately and
nsbnee sigmse eris bnit or slummot
choose a consistent scale.
cins2
oinutonomodgo2
nemdeent
b) Based on the Scatter Plot Diagram, would you estimate the correlation coefficient to be
positive, close to zero, or negative:
4) Professor Wan is in charge of a program to prepare people for a high-school equivalence
exam. Records show that 70% of the students need work in math, 60% need work in
English, and 50% need work in both areas. Use the appropriate formula to compute the
probability that a student selected at random will need math or need English.
yiidsdong er
5) An animal shelter has a 65% adoption rate for puppies. Of all puppies in the shelter, 62%
live to be 7 years or older. Of the puppies who are adopted, 75% live to be 7 years or older.
What is the probability that a randomly selected puppy in the shelter will get adopted and
live 7 or more years?
( 10)9 des
Transcribed Image Text:3) Do people drive more slowly on tree-lined street? In the following table x is a random variable representing the number of tree per mile of road on randomly selected streets with a 25 mph speed limit in a major city while y represents the average speed of cars in mph sampled over a one-hour period at the same time of day 47 25 12 30 me to que 35 y 25 50 44 45 ent brit (d a) Draw a Scatter Plot Diagram of the data. Remember to label the axes appropriately and nsbnee sigmse eris bnit or slummot choose a consistent scale. cins2 oinutonomodgo2 nemdeent b) Based on the Scatter Plot Diagram, would you estimate the correlation coefficient to be positive, close to zero, or negative: 4) Professor Wan is in charge of a program to prepare people for a high-school equivalence exam. Records show that 70% of the students need work in math, 60% need work in English, and 50% need work in both areas. Use the appropriate formula to compute the probability that a student selected at random will need math or need English. yiidsdong er 5) An animal shelter has a 65% adoption rate for puppies. Of all puppies in the shelter, 62% live to be 7 years or older. Of the puppies who are adopted, 75% live to be 7 years or older. What is the probability that a randomly selected puppy in the shelter will get adopted and live 7 or more years? ( 10)9 des
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