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The lengths (in minutes) of a random selection of popular children's animated films are listed below. Estimate the true mean length of all children's animate films with 95% confidence. Assume the variable is normally distributed.
Determine the distributions given below represent a probability distribution. Justify your answer.
Suppose that the National Labor Relations Board (NLRB) wishes to estimate the average hourly wage rate for a certain classification of skilled workers. It wishes to be 95% certain to get an estimate of sample mean within 0.05 of the truth.
Of the 250 students in a blind taste test, 150 (60%) preferred Milwaukee's Best over Natural Light. Then the 90% confidence interval for the student population proportion preferring Milwaukee's Best is:
In the basic economic order quantity (EOQ) model, if monthly demand is a constant 430 units, the order quantity is 144 (12 dozen), and the firm operates during fifty five-day weeks a year, the cycle time will be approximately?
two parts are assembled. the distributions of x1 and x2 are normal with micro1 20 s1 0.3 and micro2 19.6 s2 0.4.
The mean math score for fifth grade students at Smart Elementary is 90 with a standard deviation of 8. The fifth grade students are tested each year to determine if the mean score remains the same.
One objective of this course is learning how to correctly interpret statistical measures.
a company has developed a new deluxe aaa battery that is supposed to last longer than its regular aaa battery. however
Suppose in a population of 100,000, the probability that an individual will die from bird flu in a given winter is .00009. If the data fits a Poisson distribution, then the mean number of people in that population that will die from bird flu in on..
The intensity level of an earthquake is based on the Richter scale. Using logarithms, the Richter scale measures an earthquake relative to (as a ratio of) the weakest possible tremor.
In a study , the average age of the male candidates who were affected , was 38.20 whereas the average age of the female subjects was calculated to 34.976 with the standard deviation of 156.91 and 116.16 respectively
Random sample with a normal distribution with a mean of 60,000 and standard deviation of 2300. What warranty should the company us if they want 96% of the tires to outlast the warranty?
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