Answer:
And we can find this probability using the complement rule and excel or a calculator and we got:
Explanation:
Previous concepts
Normal distribution, is a "probability distribution that is symmetric about the mean, showing that data near the mean are more frequent in occurrence than data far from the mean".
The Z-score is "a numerical measurement used in statistics of a value's relationship to the mean (average) of a group of values, measured in terms of standard deviations from the mean".
Solution to the problem
Let X the random variable that represent the rating score of a population, and for this case we know the distribution for X is given by:
Where and
We are interested on this probability
And the best way to solve this problem is using the normal standard distribution and the z score given by:
If we apply this formula to our probability we got this:
And we can find this probability using the complement rule and excel or a calculator and we got:
Insurance of equipment during shipping, purchase price, freight to deliver the equipment to its location, installation and testing of equipment
Answer:
No-shows in Hotel Reservations
Sample mean
= Sum of the samples divided by the number
= (18 + 16 + 16 + 16 + 14 + 18 + 16 + 18 + 14 + 19)/10 = 16.5
Explanation:
In mathematics and statistics, the arithmetic mean, or simply the mean or average is the sum of a collection of numbers divided by the count of numbers in the collection.
A sample mean therefore is the average of the sum of a collection of samples divided by the count of numbers in the collection. Simply, the sample mean is the average of all the measurements in the sample.
The value of the bond will increase in the market.
<u>Explanation:</u>
In a situation in the economy where there is a fall in the rate of interest, in that case , the value of the bond which has a fixed rate of interest will increase.
Since the rate of interest of that corporate bond is fixed but there is a fall in the rate of interest in the economy, the value of the bond whose rate of interest can not fall, will increase.
<span>Heavy speculation is a bad idea in any market since it has a tendency to inflate prices to unrealistic levels. That is basically what many investors prior to the Great Depression did when they thought the market would keep going higher and higher. They borrowed money, sold their houses, etc.. to buy into the stock market thanks to that kind of speculation without even considering the underlying reasons for why the market is there in the first place.</span>