Question

Right-Handed Left-Handed Satisfactory Performance 600 100 Unsatisfactory Perforance 200 100 What is the probability of being left handed or having an unsatisfactory performance

Answer #1

The probability of being left handed or having an unsatisfactory performance is 2/5=0.4

Suppose that we want to see if the probability of being
left-handed is different for men than it is for women. And suppose
that 472 students in this class each test this hypothesis at the 2%
significance level using their own personalized class data
set.
(a)
If the probability of being left-handed is in fact the same for
men as it is for women, how many students (on average) would reject
the null hypothesis, and falsely conclude that the probability...

The vast majority of people have hand dominance--they are either
left-handed or right-handed.
In this question we will ignore the very small percentage of the
population who are
ambidextrous (i.e., those who use both hands equally well or
equally badly!).
A researcher believes that men are more likely to be left-handed
than women. To check this she
checked the dominant hand of random samples of 200 men and 200
women, and found 24 men
and 18 women to be left-handed....

In a large university, 88 percent are right-handed and 12
percent are left-handed. One hundred students are selected at
random with replacement. The probability that the proportion of
left-handed individuals in the sample is within 2 percentage points
of the population proportion of 12 percent is closest to (use
normal approximation):

An employee is classified in one of three categories of
performance: outstanding, satisfactory, or unsatisfactory. Each
employee is either probationary or appointive. Human resources
determines that 60% of employees are probationary. Further, it is
known that 3% are satisfactory. 10% are outstanding and
probationary, while 1% are appointive and unsatisfactory.
a. Find ?(?|?) and explain the meaning of your answer.
b. Anyone who is outstanding or satisfactory is deemed to be a
worthy employee of the company. According to the...

1. Of Starfleet personnel, 40% are non-human, and 20% are
left-handed. 56% are right-handed humans. We randomly select a
member of Starfleet. Given the characteristics “human”, and
“right-handed”, find the various probabilities following a random
selection:
a) the probability the selection possesses exactly one of these
characteristics
b) the probability the selection neither of these
characteristics
c) the probability the selection possesses at least one of these
characteristics

A survey of some Stats students recorded gender and whether the
student was left or right-handed. Results were summarized in a
table like the one shown. If it turned out that handedness was
independent of gender, how many of the Stats students were lefty
girls? Write a sentence to justify your answer.
Left Handed
Right Handed
Women
66
Men
54
20
100
120

An employee is classified in one of three categories of
performance: outstanding, satisfactory, or unsatisfactory. Each
employee is either probationary or appointive. Human resources
determines that 60% of employees are probationary. Further, it is
known that 3% are satisfactory. 10% are outstanding and
probationary, while 1% are appointive and unsatisfactory.
a. Using a contingency table, show how every employee in the
company is categorized according to this system.
b. Denote outstanding, satisfactory and unsatisfactory by O, S,
and U, and...

Suppose that about 9.5% of the population is
left-handed. A 200-seat school auditorium has been built with 15
“lefty seats,” seats that have the built-in desk on the left rather
than the right arm of the chair. What is the largest number of
students that can sit in the auditorium and still have enough seats
for left-handed students? Explain how you arrived at your
answer.

About 10% of people are left-handed. Suppose there is an unusual
genetic feature that affects 2% of right-handed people and 15% of
left-handed people. If a baby has this feature, what is the
probability that they will be left-handed?

It is commonly known that approximately 10% of the population is
left-handed. Nike Golf would like to estimate the proportion of
left-handed golfers in order to plan the schedule of golf club
production. Assume Nike collected a sample of 200 golfers.
What is the probability that more than 12% of the golfers in
the sample are left-handed?
What is the probability that less than 14% of the golfers in
the sample are left-handed?
What is the probability that between 6%...

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