intercept (a) =
52.182
slope(b) =
15.264
Answer Key: 52.182, 15.264
Part 11 of 16 -
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Question 18 of 23
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Accepted characters
: numbers, decimal point markers (period or comma), sign indicators (-),
spaces (e.g., as thousands separator, 5 000), "E" or "e" (used in scientific notation).
NOTE:
For

scientific notation, a period MUST be used as the decimal point marker.
Complex numbers should be in the form (a + bi) where "a" and "b" need to have explicitly
stated values.
For example: {1+1i} is valid whereas {1+i} is not. {0+9i} is valid whereas {9i} is not.
An investor wants to compare the risks associated with two different stocks. One way to
measure th
e risk of a given stock is to measure the variation in the stock’s daily price changes.
In an effort to test the claim that the variance in the daily stock price changes for stock 1 is
different from the variance in the daily stock price changes for stock 2, the investor obtains a
random sample of 21 daily price changes for stock 1 and 21 daily price changes for stock 2.
The summary statistics associated with these samples are: n
1
= 21, s
1
= .849, n
2
= 21, s
2
= .529.
If you follow Bluman's advice and place the larger variance in the numerator, what is the test
value associated with this test of hypothesis? Place your answer, rounded to 3 decimal places,
in the blank. For example, 3.456 would be a legitimate entry.
2.576
Answer Key: 2.576
Part 12 of 16 -
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Question 19 of 23
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Accepted characters
: numbers, decimal point markers (period or comma), sign indicators (-),
spaces (e.g., as thousands separator, 5 000), "E" or "e" (used in scientific notation).
NOTE:
For
scientific notation, a period MUST be used as the decimal point marker.
Complex numbers should be in the form (a + bi) where "a" and "b" need to have explicitly
stated values.
For example: {1+1i} is valid whereas {1+i} is not. {0+9i} is valid whereas {9i} is not.
It has been observed that electrical connectors manufactured by Jolt Electrical Supply Company
last an average of 18.2 months and follow a normal distribution with a standard deviation of 1.7
months. Jolt agrees to replace any connector that fails within 19 months. Out of 500 connectors
sold, how many does Jolt expect to replace, on average? Place your answer, rounded to the
nearest whole number, in the blank. For example, 123 would be a legitimate answer.
160
Answer Key: 335|345
Part 13 of 16 -
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Question 20 of 23
1.0/ 1.0 Points
Accepted characters
: numbers, decimal point markers (period or comma), sign indicators (-),
spaces (e.g., as thousands separator, 5 000), "E" or "e" (used in scientific notation).
NOTE:
For

scientific notation, a period MUST be used as the decimal point marker.
Complex numbers should be in the form (a + bi) where "a" and "b" need to have explicitly
stated values.
For example: {1+1i} is valid whereas {1+i} is not. {0+9i} is valid whereas {9i} is not.
The percent defective for parts produced by a manufacturing process is targeted at 4%. The
process is monitored daily by taking samples of sizes n = 160 units. Suppose that today’s
sample contains 14 defectives.
Determine a 95% confidence interval for the proportion defective for the process today.