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Marketing and Consumer Behavior
Movie trailers are designed to entice audiences by showing scenes from coming attractions. Several trailers are usually shown in a theater before the start of the main feature, and most are available via the Internet. The duration of a movie trailer is approximately normal, with mean 150 seconds and standard deviation 30 seconds.
a. What is the probability that a randomly selected trailer lasts less than 1 minute?
b. Find the probability that a randomly selected trailer lasts between 2 minutes and 3 minutes 15 seconds.
c. Any movie trailer that lasts beyond 4 minutes and 30 seconds is considered too long. What proportion of movie trailers is too long?
d. Find a symmetric interval about the mean such that 99% of all movie trailer durations lie in this interval.
A new restaurant with 123 seats is being planned. Studies show that 57% of the customers demand a smoke free area. How many seats sould be in the non-smoking area in order to be very sure (mean+3StandardDeviation) of having enough seating there?
q1. average adult american are about one inch taller but nearly a whopping 25 pounds heavier than they were in 1960
Estimate the mean by examining the histogram.- Do you expect the mean to be smaller than, approximately equal to, or larger than the median? Why?
To allow the creation of camera-ready documents, languages like TEX and LATEX have been created. These languages can be thought of as varieties of programming language whose output controls laser printers or phototypesetters.
Write the example of statistics in news to explain the following statement which represents one of the objectives of statistics analysis: "Statistics assists us make decisions.
Suppose a randomly selected semiformal wedding has at least four bridesmaids. What is the probability that it has exactly six bridesmaids?
The booster club has gotten several businesses and car dealers to donate gasoline and cars for the college students to use to make a maximum of 575 personal contacts daily during the fund-raising drive. The college student will donate a total of 2..
What is the probability that a student selected at random from anywhere in the school system failed the test?
in a survey of 500 residents 300 were opossed to the use of the photo-cop for issuing traffic tickets. find a 95
Is the mean list price of a house lower if there are 3 bedrooms compared to 4 bedrooms? To answer this question we will construct a confidence interval and hypothesis test.
For 2000 patients,blood-clotting time was normally distributed with a mean of 8 seconds and a standard deviation of 3 seconds.what percent was blood-clotting times between 5 and 11 seconds?
In Dallas, some fire trucks were painted yellow (instead of red) to heighten their visibility. During a test period, the fleet of red fire trucks made 153,348 runs and had 20 accidents, while the fleet of yellow fire trucks made 135,035 runs and had ..
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