I'm struggling a little bit can someone help?? A cell phone costs $850. You have a coupon for 15% off. How much will you pay for
2 answers:
Given:
- <em>850 dollars is the original price of the cell phone. </em>
- <em>(discount) coupon for 15% off</em>
- <em>tax is 13 percent.</em>
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original price - discount = sales price
- 850 - (850 x
) = sales price
- ANSWER: $722.50 or
Include 13% tax... price + sales tax = total price of the phone
- 722.50 + (722.50 x
) = ?
- ANSWER: The final price of the cellphone is $816.43
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Answer:
The 98% confidence interval estimate of the proportion of adults who use social media is (0.56, 0.6034).
Step-by-step explanation:
In a sample with a number n of people surveyed with a probability of a success of , and a confidence level of
, we have the following confidence interval of proportions.
In which
z is the zscore that has a pvalue of .
Of the 2809 people who responded to survey, 1634 stated that they currently use social media.
This means that
98% confidence level
So , z is the value of Z that has a pvalue of
, so
.
The lower limit of this interval is:
The upper limit of this interval is:
The 98% confidence interval estimate of the proportion of adults who use social media is (0.56, 0.6034).