The Bureau of Transportation Statistics reports that 80% of flights for a particular airline arrive on time. A random sample of 400 flights from this airline is taken, and the arrival status (on time or delayed) for each flight is recorded

.a. What variable was recorded for this sample of flights? Is this variable categorical or quantitative?

b. Completely describe the sampling distribution of the sample proportion of on-time flights when samples of size

400 are selected.

c. It was found that 301 of the sampled flights arrived on time. Use this information to estimate the proportion of

on-time arrivals with 96% confidence.

d. Does the interval support the report by the Bureau of Transportation Statistics that 80% of flights for this airline

arrive on-time? Explain.

anser is a

step-by-step explanation:

negitive slope

answer set (b) 0.5, 3/4 80% is in order from least to greatest.  

step-by-step explanation:

in order to compare rational numbers to each other, it is much easier if they are in the same form.   typically, the best form in which to evaluate rational numbers is in decimals.   in order to convert a percent to a decimal, you would divide the given percentage by 100.   you can also accomplish the conversion by moving the decimal point over two places to the left.   for example, the decimal value of 80% is 80/100, or 0.8.   in order to convert a fraction to a decimal, you need to divide the numerator by the denominator.   for example, 3/4 is 0.75.   so, for choice (b) 0.5 3/4 (0.75), 80% (0.8) is the only choice in which the numbers are in order from least to greatest.  

no because mercury has a density of 13.6 grams per centimeter squared while gold has 19.32 grams centimeter squared

step-by-step explanation: