Answer:
The 80% confidence interval for the mean number of words a third grader can read per minute is between 40.4 wpm and 40.8 wpm.
Step-by-step explanation:
We have that to find our 
level, that is the subtraction of 1 by the confidence interval divided by 2. So:
Now, we have to find z in the Ztable as such z has a pvalue of 
.
So it is z with a pvalue of 
, so 
Now, find M as such
In which 
is the standard deviation of the population and n is the size of the sample.
The lower end of the interval is the sample mean subtracted by M. So it is 40.6 - 0.2 = 40.4 words per minute.
The upper end of the interval is the sample mean added to M. So it is 40.6 + 0.2 = 40.8 words per minute.
The 80% confidence interval for the mean number of words a third grader can read per minute is between 40.4 wpm and 40.8 wpm.
Answer:
any of the numerals from 0 to 9, especially when forming part of a number.
Answer:
A=36
C=12 inches
Step-by-step explanation:
Answer:
sin(x)
- cos(x)
Step-by-step explanation:
The derivative for f(x) up to 4 terms is
f(x) = cos(x)
f'(x) = - sin(x)
f''(x) = - cos(x)
f'''(x) = -(-sin(x))
f'''(x) = sin(x)
f''''(x) = cos(x)
What this is tell you is that you need to go to 4 differentiations before you get back to where you started from.
The next step is to find out how many groups of 4 there are in 119 differentiations, and, more importantly, what the remainder is.
So you have to go through 29 differentiations to get to 116 times you have differentiated (119/4 = 29)
There are 3 more differentiations you have to do which will be f'''(x) = sin(x)
The answer is 
===============
f(x) = sin(x)
f'(x) = cos(x)
f''(x) = -sin(x)
f'''(x) = -cos(x)
f''''(x) = sin(x)
The argument is going to be the same as you used above. 116 differentiations will get you back to sin(x). You need 3 more differentiations so f'''(x) = - cos(x)
