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The relative frequency distribution of the number of TVs sold in a day in a department store in the last year is as follows:
Number of TV sold 1 2 3 4 5Relative Frequency 0.15 0.2 0.5 0.1 0.05
Compute the mean and standard deviation of this distribution.
When using the normal distribution (empirical rule) to obtain the bounds for a 99.73 percent of the values in a population, the interval generall will be _________________ the interval obtained for the same percentage if Chebyshev's theorem is ass..
Determine the mean and standard deviation of this distribution?
A new shopping mall is considering setting up an information desk manned by one employee. Based upon information obtained from similar information desks, it is believed that people will arrive at the desk at the rate of 15 per hour.
If 485 out of the next 500 orders are processed on the same day, would this prove that they are exceeding their goal, using α = .025?
At 0.05 level of significance, is there evidence of noteworthy difference in variation in sales among different aisle locations?
An experiment consists of flipping the fair coin three times and noting the number of heads and tails. A random variable x is defined to be two times the number of heads plus the number of tails.
Determine the probability that particular call lasted between 110 and 180 seconds?
Suppose that the lives of all such bulbs have a normal distribution with a mean of 750 hours and a standard deviation of 55 hours. Let x (sample mean) be the mean life of range sample of 25 such bulbs.
If 60 percent of those people chewing the gum are successful in stopping smoking, what is the probability that in a group of four smokers using the gum at least one quits smoking?
The data show that 48 of the doctors picked Brand X. If these data are evaluated using a chi-square test for goodness of fit, what is the expected frequency for Brand X?
Would the resulting sets of data represent dependent or independent samples? Why? What could the students change in the project to have it represent the other?
In this forum post provide your results also elucidate what they mean in context of your favorite channel. To find 95 percent confidence interval for given data.
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