You see a commercial for a new product. It promises you clear skin in 30 days and greater confidence. The company selling the pr
1 answer:
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Recall that margin of error is given by:
Given that <span>you want to be 95% confident that the sample percentage is within 2.5 percentage points of the true population percentage.
This means that
and M = 2.5% = 0.025.
Part A:
When nothing is known about the percentage of persengers who prefer aisle seat, we make use of p = 50% = 0.5.
Thus,
Therefore, 1,537 </span><span>randomly selected air passengers must be surveyed to </span><span>be 95% confident that the sample percentage is within 2.5 percentage points of the true population percentage.
Part B:
Given that recent surveys surgest that about 38% of all air passengers</span> prefer an aisle seat, thus p = 38% = 0.38
<span>Thus,
Therefore, 1,449 </span>randomly selected air passengers must be surveyed to <span>be 95% confident that the sample percentage is within 2.5 percentage points of the true population percentage.</span>
Given that <span>you want to be 95% confident that the sample percentage is within 2.5 percentage points of the true population percentage.
This means that
Part A:
When nothing is known about the percentage of persengers who prefer aisle seat, we make use of p = 50% = 0.5.
Thus,
Therefore, 1,537 </span><span>randomly selected air passengers must be surveyed to </span><span>be 95% confident that the sample percentage is within 2.5 percentage points of the true population percentage.
Part B:
Given that recent surveys surgest that about 38% of all air passengers</span> prefer an aisle seat, thus p = 38% = 0.38
<span>Thus,
Therefore, 1,449 </span>randomly selected air passengers must be surveyed to <span>be 95% confident that the sample percentage is within 2.5 percentage points of the true population percentage.</span>
Answer:
During the first year, the marginal cost equals approximately the minimum EUAC cost. This is why the minimum cost of EUAC to maintain the defender throughout the year is $21,000. Since the minimum EUAC cost to maintain the defender the first year is less than the minimum EUAC cost to the challenger, the defender should not be substituted. This means, it is not economically feasible to make the replacement at this time.
Explanation:
According to the exercise, it is necessary to evaluate to know if it is economic to replace the defender by the challenger. For the calculation, the defender's information is: the defender's market value up to $3000. The expenses are $20000. The information regarding the challenger is: the installation cost $30000, the annual expenses $ 16000, the surrender value $ 2000, the economic life is 12 years, and the interest rate before taxes is 15%.
The minimum EUAC for the challenger is equal to:
The minimal cost is equal to: