evanlubbe53
28.04.2021 •
Mathematics
A researcher was tasked with determining whether the video display used by travel agents for
booking airline reservations should be in color or in black and white. Market research has shown that
travel agencies were primarily concerned with the speed at which reservations can be made.
Therefore, the question was whether color displays
allow travel agents to book reservations faster. Fifty subjects were tested with color displays (x-bar = 503 sec, s = 9.3 sec) and fifty subjects were tested with black and white displays (x-bar = 508.2 sec, s = 9.0 sec). Test if the reservations made on the color displays were significantly faster (less time) than those made on the black and white displays at a significance level of 0.05.
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Ответ:
63.8%
Step-by-step explanation:
We see that the total number of people sampled was 1000.
Out of those 1000 people, 638 of them wore glasses.
Taking the percent means diving the part by the whole (part/whole), so:
638/1000 = 63.8%
Thus, we predict that about 63.8% of Americans would wear glasses.
Hope this helps!