Answer:
<em>20%</em>
Step-by-step explanation:
<em>First, add 1,200, and 300. That gives you 1,500. You want to find how much percent of 1,500 equals 300, and that is 20%.</em>
Answer:
Confidence Interval for the mean
Step-by-step explanation:
Confidence interval is made using the observations of a <em>sample</em> of data obtained from a population, so it is constructed in such a way, that, with a certain <em>level of confidence </em>(this is the statement mentioned in the question), that is, one could have a percentage of probability that the interval, or range around the value obtained, frequently 95%, contains the true value of a population parameter (in this case, the population mean).
It is one way to extract information from a population using a sample of it. This kind of information is what inference statistic is always looking for.
An <u>approximation</u> about how to construct this interval or range:
- Select a random sample.
- For the specific case of a <em>mean</em>, you need to calculate the mean of the <em>sample </em>(sample mean), and, if standard deviation is unknown or not mentioned, also calculate the sample standard deviation.
- With this information, and acknowledged that these values follows a standard normal distribution (a normal distribution with mean 0 and a standard deviation of 1), represented by random variable Z, one can use all this information to calculate a <em>confidence interval for the mean</em>, with a certain confidence previously choosen (for example, 95%), that the population mean must be in this interval or <em>range around this sample mean.</em>
two times as long as what? 2 times as long can be written as 2x.
There is no solution because after you distribute, you have 24x in both sides. When moved to the other side, they cancel. Therefore, you are left with 24=-16 which isn’t true.
Given situation: Reggie picked 3 3/4 quarts of blueberries and 4 1/3 quarts of raspberries at a fruit farm. Question: About how many total of berries did he pick?Since we have 2 fractions with different denominator, let us first convert it to have the same denominator then add.=> 3 3/4 = convert to improper fraction=> (4 * 3 = 12 + 3 = 15) = 15/4Second Fraction=> 4 1/3 = convert to improper fractoin also=> (3 * 4 = 12 + 1 = 13) = 13/3Now, let's find the less common denominator=> 15/4 + 13/3 = 45/12 + 52/12=> 45/12 + 52/12 = 97 / 12<span>=> 8 8/100</span>
