Question 14 of 20
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 ABC battery company claims that their batteries last 100 hours, on average. You decide to conduct a
test to see if the company's claim is true. You believe that the mean life may be different from the 100
hours the company claims. You decide to collect data on the average battery life (in hours) of a random
sample of n = 20 batteries. Some of the information related to the hypothesis test is presented below.
Test of H0: f$mu f$ = 100 versus H1: f$mu
eq f$
100
Sample mean 98.5
Std error of mean 0.777
Assuming the life length of batteries is normally distributed, what is the p-value associated with this
test?
Place your answer, rounded to 3 decimal places in the blank. For example, 0.234 would be a
legitimate entry.
Correct.0685

Question 15 of 20
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.
Let x be a random variable representing dividend yield of Australian bank stocks. We may assume that x
has a normal distribution with f$sigma f$ = 2.8%.
A random sample of 16 Australian bank stocks has a
sample mean dividend yield of 8.91%. For the entire Australian stock market, the mean dividend yield is
f$mu
f$ = 6.4%.
If you wanted to test to determine if these data indicate that the dividend yield of all
Australian bank stocks is higher than 6.4%, what is the value of the test statistic?
Place your answer,
rounded to 3 decimal places, in the blank. For example, 2.345 would be a legitimate entry.
Correct3.586