1. Determine whether the given source in the following scenario
has the potential to create a bias in a statistical study. Amounts
of arsenic in samples of rice grown in Texas were measured by the
Food and Drug Administration (FDA). Is there a potential to create
bias?2.A deadly disaster in the United States was the Triangle
Shirtwaist Factory Fire in New York City. A population of 146
garment workers died in that fire.Identify whether the given value
is a statistic or a parameter3.The average (mean) atomic weight of
all elements in the periodic table is 134.355 unified atomic mass
unitsIdentify whether the given value is a statistic or a
parameter.4.The Clerk of the US House of Representatives records
the number of representatives present at each session.Determine
whether the data from a discrete or continuous data set.5.When
studying the relationship between lengths of feet and heights so
that footprint evidence at the crime scene can be used to estimate
the height of the suspect, a researcher records the exact lengths
of feet from a large sample of random subjects Determine whether
the data from a discrete or continuous data set.6.One study showed
that for a recent period of 11 years, there was a strong
correlation (or association) between the numbers of people who
drowned in swimming pool and the amounts of power generated by
nuclear power plants (based on data from the Centers for Disease
Control and Prevention and the Department of Energy). Does this
imply that increasing power from nuclear power plants is the cause
of more deaths in swimming pools? Why or why not?7.Determine
whether the sampling method appears to be sound or is flawed.
Briefly explain the reason.Researchers at Yale University conduct a
wide variety of clinical trials by using subjects who volunteer
after reading advertisements soliciting paid volunteers.8.In a
study conducted by the Society for Human Resource Management, 347
human resource professionals were surveyed. Of those surveyed, 73%
said that their companies conduct criminal background checks on all
job applicants.
What is the exact value that is 73% of the 347 survey
subject?
Could the result from part (a) be the actual number of survey
subjects who said that their companies conduct criminal background
checks on all job applicants? Why or why not?
What is the actual number of survey subjects who said that
their company conducts criminal background checks on all job
applicants?
Assume that 112 of the survey subjects are females. What
percentage of those surveyed are females?
9.Find the range, variance, and standard deviation for the
given sample data. Please make sure to show your work step by step.
Listed below are prices in dollars for one night at different
hotels located on Las Vegas Boulevard. How useful are the measures
of variation for someone searching for a room?212 77 121 104 153
264 195 24410.“Who discovered penicillin: Sean Penn, William Penn,
Penn Jillette, Alexander Fleming, or Louis Pasteur?” If you make a
random guess for the answer to that question, what is the
probability that your answer is the correct answer of Alexander
Fleming?11.In a recent year in the United States, 83,600 passenger
cars rolled over when they crashed, and 5,127,400 passenger cars
did not roll over when they crashed. The probability that randomly
selected passenger cars did not roll over when they crashed is:
____. Is it unlikely for a car to roll over in a crash? ____ (yes
or no).12.A roulette wheel has 38 slots. One slot is 0, another is
00, and the others are numbered 1 through 36, respectively. You
place a bet that the outcome is an odd number. Your probability of
winning is: ____. The actual odds against winning is: ____.13.In
China, where many couples were allowed to have only one child, the
probability of a baby being a boy was 0.545. Among six randomly
selected births in China, the probability that at least one of them
is a girl is ____.14.Assume that random guesses are made for eight
multiple choice questions on an SAT test, so that there are n=8
trials, each with probability of success (correct) given by p=0.20.
Find the probability that the number x of correct answers is no
more than two.15.Assume that when adults with smartphones are
randomly selected, 54% use them in meetings or classes (based on
data from an LG Smartphone survey). If 12 adult smartphone users
are randomly selected, find the probability that fewer than 3 of
them use their smartphones in meetings or classes.16.In a recent
year, there were 333 murders in New York City. Find the mean number
of murders per day, then use that result to find the probability
that in a day, there are no murders.
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