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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.
three children a couple plans on having three children. suppose that the probability of any given child being female is
Carry out the suitable calculations to test for effect modification. Interpret your results.
The first step in this assignment is to provide SPSS with the Value Labels for the values in LOCALE97.
Tony Hsieh is CEO of e-tailer Zappos.com. His company sells shoes online. It differentiates itself by its selection of shoes and a devotion to customer service.
Do these data provide sufficient evidence at the 0.01 significance to conclude that the unemployment rate in Boston was less than the national unemployment rate
Calculate a 95% confidence interval for the population proportion. Interpret the interval in a way that could be understood by a statistically naïve reader.
Identify the independent and dependent variables in the following descriptions of experiments:- Students watched a cartoon either alone or with others and then rated how funny they found the cartoon to be.
Two persons have 16 and 32 dollars, respectively. They bet one dollar on each of 900 independent tosses of an un biased coin. What is an approximation to the probability that neither person is in debt at the end of the 900 trials?
Determine which pair of Judges have the nearest approach to the common likings in dance - Do you consider that blindness and insanity are equally associated or disassociated with each other in two age groups or more in one-group than in other?
What percent of all the cars surveyed were foreign?- What percent of the American cars were owned by students?- What percent of the students owned American cars?
Suppose that among workers exposed to asbestos in a shipyard in 1980, 33 died over a 10-year period from COPD, whereas only 24 such deaths would be expected based on statewide mortality rates. Is the number of deaths from COPD in this group excess..
Hugh's Repair Shop specializes in repairing German and Japanese cars. The shop has two mechanics. One mechanic works on only German cars and the other mechanic works on only Japanese cars.
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