Answer:
We conclude that population mean is equal to 100 at the α=0.01 level of significance.
Step-by-step explanation:
Given information:
Sample size, n=40
Sample mean=104.3
sample standard deviation, s=18.2
We need to check whether the population mean greater than 100 at the α=0.01 level of significance.
Null hypothesis:
Alternative hypothesis:
Let as assume that the data follow the normal distribution. It is a right tailed test.
The formula for z score is
Using the standard normal table the p-value at z=1.49 and 0.01 level of significance is 0.068112.
(0.068112 > 0.01) p-value is greater than α, so we accept the null hypothesis.
Therefore, we conclude that population mean is equal to 100 at the α=0.01 level of significance.
1 times 108 because the normal height for a skyscraper is usually way more than any of those
As the value of n decreases, the value of the expression, n + 15 also: <em>B. decreases.</em>
Given the algebraic expression, n + 15
We are required to determine what will happen to the value of the expression as variable n decreases in value.
To perfectly determine what will happen, we are going to plug in different values of variable n from the largest to the least and see what happens to the value of "n + 15".
Thus, let's use 3, 2, and 1.
- Plug in n = 3 into n + 15.
n + 15 = 3 + 15 = 18
- Plug in n = 2 into n + 15.
n + 15 = 2 + 15 = 17
- Plug in n = 1 into n + 15.
n + 15 = 1 + 15 = 16
Therefore, we can conclude that, as the value of n decreases, the value of the expression, n + 15 also: <em>B. decreases.</em>
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Learn more about algebraic expression on:
brainly.com/question/7463555
If you're asking for the retail price after it's marked down, this is how you do it:
50(22%)=11
That means that there's a reduction of $11, so you subtract 11 from 50
50-11=39
The price is $39
The answer is 3 to subtract the fractions, find the LCD and then combine