Question
In: Statistics and Probability
1. A researcher desires to know whether the typing speed of a secretary (in words per...
1. A researcher desires to know whether the typing speed of a secretary (in words per minute) is related to the time (in hours) that it takes the secretary to learn to use a new word processing program. The data are shown below. Speed 48 74 52 79 83 56 85 63 88 74 90 92 Time 7 4 8 3.5 2 6 2.3 5 2.1 4.5 1.9 1.5 First, make a scatter plot of the data. Next, find the correlation coefficient. Lastly, run a hypothesis test to determine if there is a linear relationship between speed and time at the 95% level of confidence.
2. For Problem 1, find the equation of the linear regression line and predict the time for a speed of 72 words per minute.
3. For Problem 1, find the 95% prediction interval for time when the speed is 72 words per minute.
Solutions
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orchestra answered 2 years agoRelated Solutions
A researcher desires to know whether the typing speed of a secretary (in words per minute)...
A researcher desires to know whether the typing speed of a
secretary (in words per minute) is related to the time (in hours)
that it takes the secretary to learn to use a new word processing
program. The data are shown.
Speed x
Time y
48
7
74
4
52
8
79
3.5
83
2
56
6
85
2.3
63
5
88
2.1
74
4.5
90
1.9
92
1.5
If there is a significant relationship, predict the time it will...
1. A researcher wants to know if the typing speed of a secretary in words per...
1. A researcher wants to know if the typing speed of a secretary
in words per minute is related to the time in hours that it takes
to learn the new word processing program. Below is speed versus
hours to learn program. What is the regression equation? Typing
speed --48- 74 - 52-- 79-- 83-- 56-- 85-- 63-- 88-- 74-- 90-- 92
Time hrs.----- --7---- 4---- 8 -- 3.5 --2 -- 6 ---2.3-- 5 -- 2.1--
4.5--1.9- 1.5 Select one:...
Step 1 of 5: Suppose that the distribution of typing speed in words per minute (wpm)...
Step 1 of 5: Suppose that the distribution of typing speed in
words per minute (wpm) for experienced typists using a new type of
split keyboard can be approximated by a normal curve with mean 60
wpm and standard deviation 15 wpm. What is the probability that a
randomly selected typist's speed is at most 60 wpm? Round your
answer to one decimal place.
What is the probability that a randomly selected
typist's speed is between 45 and 90 wpm? Round...
Suppose that the distribution of typing speed in words per minute (wpm) for experienced typists using...
Suppose that the distribution of typing speed in words per
minute (wpm) for experienced typists using a new type of split
keyboard can be approximated by a normal curve with mean 64 wpm and
standard deviation 15 wpm. b. What is the probability that a
randomly selected typists typing speeds is between 45 and 90 wpm?
Round your answer to four decmial places. Would you be surprised to
find a typist in tis pop. to excced 105 wpm? Suppose two...
Suppose that the distribution of typing speed in words per minute (wpm) for experienced typists using...
Suppose that the distribution of typing speed in words per
minute (wpm) for experienced typists using a new type of split
keyboard can be approximated by a normal curve with mean 68 wpm and
standard deviation 17 wpm.
What is the probability that a randomly selected typist's speed
is at most 68 wpm?
What is the probability that a randomly selected typist's speed
is less than 68 wpm?
What is the probability that a randomly selected typist's speed
is between...
A researcher wants to determine the relationship between the typing speed of administrative assistants at a...
A researcher wants to determine the relationship between the
typing speed of administrative assistants at a major university is
related to the time that it takes for the admin assistant to learn
to use a new software program and may be used to predict learning
time. Data are gathered from 12 departments at the university.
Dept Typing speed (words per minute) Learning time (hours)
A 48 7
B 74 4
C 52 8
D 79 3.5
E 83 2
F...
Question 1 Keyboarding or typing 100 words per minute can be thought of as a? Group...
Question 1
Keyboarding or typing 100 words per minute can be thought of
as a?
Group of answer choices
A)competency
B)skill
C)aptitude
D)none of the above is correct
Question 2
Lacey studied at Florida Atlantic University (FAU) for her
bachelor's in business administration (BBA). Along the way, she
took several keyboarding courses and types over 130 words per
minute.
In her coursework, she also studied hotel & resort
operations as well as, specifically, an external course on the Best
Use...
1. A researcher would like to know whether there is a consistent, predictable relationship between verbal...
1. A researcher would like to know whether
there is a consistent, predictable relationship between verbal
skills and math skills for high school students. A sample of 200
students is obtained, and each student is given a standardized
verbal test and a standardized math test. Based on the test
results, students are classified as high or low for verbal skills
and for math skills. The results are summarized in the following
frequency distribution:
Verbal
Skills
High Low
Math skills
High...
The sample data below are the typing speeds (in words per minute) and reading speeds (in...
The sample data below are the typing speeds (in words per
minute) and reading speeds (in words per minute) of nine randomly
selected secretaries. Here, x denotes typing speed, and y denotes
reading speed.
X
60
56
52
63
70
58
44
79
62
Y
587
551
528
607
645
531
503
652
571
At the 10% significance level, predict the reading speed for a
typing speed of 74 words per
minute.
a marketing research company desires to know the mean consumption of potatoes per week among people...
a marketing research company desires to know the mean
consumption of potatoes per week among people over age 49. They
believe that potatoes consumption has a mean of 4.2 pounds and want
to construct a 95% confidence interval with a maximum error of .05
pounds. Assuming a variance of 1.44 pounds, what is the minimum
number of people over age 49 they must include in their sample?
A)1960
B)2401
C)49
D)2213
E)297
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