Question

The table below shows the number of survey subjects who have
received and not received a speeding ticket in the last year, and
the color of their car.

Red Car | Not Red Car | Total | |

Speeding Ticket | 19 | 47 | 66 |

No Speeding Ticket | 478 | 456 | 934 |

Total | 497 | 503 | 1000 |

Answer #1

P( a randomly chosen person has a red car) = 497/1000 = 0.497

P( a randomly chosen person has a speeding ticket) = 66/1000 = 0.066

P( a randomly chosen person has a speeding ticket given they have a red car) = 19/497 = 0.038

P( a randomly chosen person Has a red car given they have a speeding ticket) = 19/66 = 0.288

P( a randomly chosen person Has a red car and got a speeding ticket) = 19/1000 = 0.019

P( a randomly chosen person Has a red car or got a speeding ticket.) = (497 + 66 - 19)/1000 = 544/1000 = 0.544

The table below shows the number of survey subjects who have
received and not received a speeding ticket in the last year, and
the color of their cars.
Speeding Ticket
No Speeding Ticket
Total
Red Car
156
113
269
Not Red Car
172
82
254
Total
328
195
523
Find the probability that a randomly chosen person:
a) Has a red car.
b) Has a speeding ticket.
c) Has a speeding ticket given they have a red
car.
d) Has...

The table below shows the number of cars sold last month by
seven employees at Concord Motors and their number of years of
sales experience.
Experience
Sales
1
8
2
6
2
7
4
14
5
9
6
13
8
10
Management would like to use simple regression analysis to estimate
monthly car sales using the number of years of sales experience.
The y-intercept for the regression equation is ________.
2.165
4.598
6.940
8.337

The table below shows the number of cars sold last month by
seven employees at Concord Motors and their number of years of
sales experience.
Experience
Sales
1
8
2
6
2
7
4
14
5
9
6
13
8
10
Management would like to use simple regression analysis to estimate
monthly car sales using the number of years of sales experience.
The 95% confidence interval that estimates the average monthly
sales for an employee with 5 years of experience...

The table below shows the number of cars sold last month by
seven employees at Concord
Motors and their number of years of sales experience.
Experience
Sales
1
8
2
6
2
7
4
14
5
9
6
13
8
10
Management would like to use simple regression analysis to estimate
monthly car sales using the sales as a function of experience (in
years). Which of the following is true?
Experience is the independent variable.
Sales is the independent variable...

The table below shows the total number of COVID-19 tests
conducted in Australia and in selected state and territory, since
22 January 2020. This figure represents the percent of all tests
that have returned a positive result for COVID-19. The number of
total tests conducted is updated daily but the rate of positive
tests has been found to be invariant. Suppose that people
independently conducted their tests following a binomial
distribution and the percent of positive tests reported in each...

The contingency table below shows the results of a survey of
video viewing habits by age. Video Viewing Platform Preferred
Viewer Age Mobile/Laptop Device TV Screen Row Total 18–34 39 24 63
35–54 14 14 28 55+ 2 7 9 Column Total 55 45 100 Find the following
probabilities or percentages: (a) Probability that a viewer is aged
18–34. (Round your answer to 2 decimal places.) Probability (b)
Probability that a viewer prefers watching videos on a TV screen.
(Round...

The contingency table below shows the results of a survey of
video viewing habits by age.
Video Viewing Platform Preferred
Viewer Age
Mobile/Laptop Device
TV Screen
Row Total
18–34
40
23
63
35–54
12
12
24
55+
5
8
13
Column Total
57
43
100
Find the following probabilities or percentages:
(a) Probability that a viewer is aged 18–34.
(Round your answer to 2 decimal places.)
Probability
(b) Probability that a viewer prefers watching videos on a
TV...

The table below shows the probability outcomes when
randomly choosing 7 Gen X aged individuals and asking them to
respond yes or no to this question: Do you have one or more
tattoos?
Number of Gen Xers that have at least one tattoo.
0
0.017
1
0.095
2
0.224
3
0.293
4
0.230
5
0.109
6
0.028
7
0.003
Use the table to calculate average number of individuals (based
on a survey of 7 Gen Xers) who have one or...

Exercise 1
The table below shows results from the New Mexico Behavioral
Risk Factor Surveil-
lance System (BRFSS), an annual survey conducted by telephone.
Data are shown
for the years 2011 and 2015. Each year represents a different
random sample. The
results below indicate the sample size and number of people who
reported that they
have been diagnosed with diabetes.
Diagnosed with diabetes
Year
yes
no
total
2011
1189
8135
9324
2015
908
5617
6525
Conduct a hypothesis test of...

5. Car Crashes and Age Brackets Among drivers who have had a car
crash in the last year, 88 are randomly selected and categorized by
age, with the results listed in the accompanying table (based on
data from the Insurance Information Institute). If all ages have
the same crash rate, we would expect (because of the age
distribution of licensed drivers) the given categories to have 16%,
44%, 27%, and 13% of the subjects, respectively. At the 0.05
significance level,...

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