The table below shows the number of cars (in millions) sold in the United States for various years and the percent of those cars manufactured by GM.
Unitary Method
The word “unitary” comes from the word “unit”, which means a single and complete entity. In this method, we find the value of a unit product from the given number of products, and then we solve for the other number of products.
Speed, Time, and Distance
Imagine you and 3 of your friends are planning to go to the playground at 6 in the evening. Your house is one mile away from the playground and one of your friends named Jim must start at 5 pm to reach the playground by walk. The other two friends are 3 miles away.
Profit and Loss
The amount earned or lost on the sale of one or more items is referred to as the profit or loss on that item.
Units and Measurements
Measurements and comparisons are the foundation of science and engineering. We, therefore, need rules that tell us how things are measured and compared. For these measurements and comparisons, we perform certain experiments, and we will need the experiments to set up the devices.
The table below shows the number of cars (in millions) sold in the United States for
various years and the percent of those cars manufactured by GM.
![41. FILE The table below shows the number of cars (in millions) sold in the United States for
various years and the percent of those cars manufactured by GM.
Year
Cars Sold (mllons) Percent GM
Year Cars Sold (mllons)
Percent GM
1950
6.0
50.2
1985
15.4
40.1
1955
7.8
50.4
1990
13.5
36.0
1960
7.3
44.0
1995
15.5
31.7
1965
10.3
49.9
2000
17.4
28.6
1970
10.1
39.5
2005
16.9
26.9
1975
10.8
43.1
2010
11.6
19.1
1980
11.5
44.0
2015
17.5
17.6
Use a statistical software package to answer the following questions.
a. Is the number of cars sold directly or indirectly related to GM's percentage of the
market? Draw a scatter diagram to show your conclusion.
b. Determine the correlation coefficient between the two variables. Interpret the value.
c. Is it reasonable to conclude that there is a negative association between the two
variables? Use the .01 significance level.
d. How much of the variation in GM's market share is accounted for by the variation in
cars sold?](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2F1568584d-52a9-45f8-8c53-a293b17582da%2Fcee1464b-9bbb-40cc-9206-18fb34ce8969%2F4ew5g7l_processed.jpeg&w=3840&q=75)
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