Which expression does the number line represent? A number line going from 0 to StartFraction 9 Over 4 EndFraction in increments
2 answers:
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Answer:
111 minutes
Step-by-step explanation:
step 1
Find out how long are the six commercial
Multiply the number of commercials by 90 seconds
so
Convert to minutes
Remember that
step 2
Subtract the duration of six commercials from the duration of the program
Remember that
so
therefore
Answer:
c) .22
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 the margin of error M as such
In which is the standard deviation of the population and n is the size of the sample.
In this question:
Then