The National Health Interview Survey, which included a questionnaire administered during in-person interviews with 21,781 adults
1 answer:
Answer:
The 95% confidence interval for the proportion of American adults who smoked in 2008 is (20.1%, 21.1%).
Step-by-step explanation:
The critical value of <em>z</em> for 95% confidence level is:
<em>z</em> = 1.96
Compute the 95% confidence interval for the proportion of American adults who smoked in 2008 as follows:
Thus, the 95% confidence interval for the proportion of American adults who smoked in 2008 is (20.1%, 21.1%).
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Answer:
D.
Step-by-step explanation:
- The equation of the red quadratic graph is
.
- This is the parent quadratic function or the base of the quadratic functions.
- This red quadratic graph has been dilated by a certain scale factor to obtain the blue graph. Recall that, when the scale factor is a fraction, such that
the graph is stretched horizontally.
- The dilated graph then becomes wider than the parent function.
- From the given function equations, the possible value of k can only be
.
- Therefore the blue graph has equation:
- The correct answer is D.
Answer:
Rebecca and Dan need to ride on the third day in order to achieve goal of biking.
Step-by-step explanation:
Given:
Goal of Total number of hours of biking in park =20 hours.
Number of hours rode on first day =
So we will convert mixed fraction into Improper fraction.
Now we can say that;
To Convert mixed fraction into Improper fraction multiply the whole number part by the fraction's denominator and then add that to the numerator,then write the result on top of the denominator.
can be Rewritten as
Number of hours rode on first day =
Also Given:
Number of hours rode on second day =
can be Rewritten as
Number of hours rode on second day =
We need to find Number of hours she need to ride on third day in order to achieve the goal.
Solution:
Now we can say that;
Number of hours she need to ride on third day can be calculated by subtracting Number of hours rode on first day and Number of hours rode on second day from the Goal of Total number of hours of biking in park.
framing in equation form we get;
Number of hours she need to ride on third day =
Now we will use LCM to make the denominators common we get;
Number of hours she need to ride on third day =
Now denominators are common so we will solve the numerator we get;
Number of hours she need to ride on third day =
Hence Rebecca and Dan need to ride on the third day in order to achieve goal of biking.