The annual rainfall in a certain region is approximately normally distributed with mean 42.6 inches and standard deviation 5.8 inches. Round answers to the nearest tenth of a percent. a) What percentage of years will have an annual rainfall of less than 44 inches? % b) What percentage of years will have an annual rainfall of more than 40 inches? % c) What percentage of years will have an annual rainfall of between 38 inches and 43 inches?
In: Statistics and Probability
Scores of an IQ test have a bell-shaped distribution with a mean of 100 and a standard deviation of 19. Use the empirical rule to determine the following. (a) What percentage of people has an IQ score between 62 and 138? (b) What percentage of people has an IQ score less than 43 or greater than 157? (c) What percentage of people has an IQ score greater than 138? (a) 95% (Type an integer or a decimal.)
In: Statistics and Probability
The blood platelet counts of a group of women have a bell-shaped distribution with a mean of 246.3 and a standard deviation of 60.3. (All units are 1000 cells/muL.) Using the empirical rule, find each approximate percentage below. a. What is the approximate percentage of women with platelet counts within 3 standard deviations of the mean, or between 65.4 and 427.2? b. What is the approximate percentage of women with platelet counts between 125.7 and 366.9?
In: Statistics and Probability
The blood platelet counts of a group of women have a bell-shaped distribution with a mean of
246.8246.8
and a standard deviation of
64.864.8.
(All units are 1000
cells/muμL.)
Using the empirical rule, find each approximate percentage below.
|
a. |
What is the approximate percentage of women with platelet
counts within
11 standarddeviationdeviation of the mean, or between182.0182.0 and311.6311.6? |
|
b. |
What is the approximate percentage of women with platelet
counts between
117.2117.2 and376.4376.4? |
In: Statistics and Probability
The blood platelet counts of a group of women have a bell-shaped distribution with a mean of
260.9260.9
and a standard deviation of
65.465.4.
(All units are 1000
cells/muμL.)
Using the empirical rule, find each approximate percentage below.
|
a. |
What is the approximate percentage of women with platelet
counts within
33 standarddeviationsdeviations of the mean, or between64.764.7 and457.1457.1? |
|
b. |
What is the approximate percentage of women with platelet
counts between
130.1130.1 and391.7391.7? |
In: Statistics and Probability
The blood platelet counts of a group of women have a bell-shaped distribution with a mean of 259.5 and a standard deviation of 66.4. (All units are 1000 cells/muL.) Using the empirical rule, find each approximate percentage below.
a.
What is the approximate percentage of women with platelet counts within 3 standard deviations of the mean, or between 60.3 and 458.7?
b.
What is the approximate percentage of women with platelet counts between 126.7 and 392.3?
In: Statistics and Probability
The blood platelet counts of a group of women have a bell-shaped distribution with a mean of 261.7 and a standard deviation of 65.5. (All units are 1000 cells/muL.) Using the empirical rule, find each approximate percentage below. a. What is the approximate percentage of women with platelet counts within 2 standard deviations of the mean, or between 130.7 and 392.7? b. What is the approximate percentage of women with platelet counts between 65.2 and 458.2?
In: Math
An institute reported that
6262%
of its members indicate that lack of ethical culture within financial firms has contributed most to the lack of trust in the financial industry. Suppose that you select a sample of 100 institute members. Complete parts (a) through (d) below.
a. What is the probability that the sample percentage indicating that lack of ethical culture within financial firms has contributed the most to the lack of trust in the financial industry will be between
6060%
and
6767%?
. 5083.5083
(Type an integer or decimal rounded to four decimal places as needed.)b. The probability is
6060%
that the sample percentage will be contained within what symmetrical limits of the population percentage?The probability is
6060%
that the sample percentage will be contained above
nothing %
and below
nothing %.
In: Statistics and Probability
|
Both Bond Sam and Bond Dave have 8 percent coupons, make semiannual payments, and are priced at par value. Bond Sam has 4 years to maturity, whereas Bond Dave has 11 years to maturity. |
| If interest rates suddenly rise by 3 percent, what is the percentage change in the price of Bond Sam? | |
| If interest rates suddenly rise by 3 percent, what is the percentage change in the price of Bond Dave? | |
|
If rates were to suddenly fall by 3 percent instead, what would the percentage change in the price of Bond Sam be then? |
|
|
If rates were to suddenly fall by 3 percent instead, what would the percentage change in the price of Bond Dave be then? |
|
In: Finance
|
Both Bond Sam and Bond Dave have 8 percent coupons, make semiannual payments, and are priced at par value. Bond Sam has 4 years to maturity, whereas Bond Dave has 17 years to maturity. |
| If interest rates suddenly rise by 3 percent, what is the percentage change in the price of Bond Sam? | |
| If interest rates suddenly rise by 3 percent, what is the percentage change in the price of Bond Dave? | |
|
If rates were to suddenly fall by 3 percent instead, what would the percentage change in the price of Bond Sam be then? |
|
|
If rates were to suddenly fall by 3 percent instead, what would the percentage change in the price of Bond Dave be then? |
|
In: Finance