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Which statistical technique (one-way ANOVA, regression analysis, chi-squared) do you suggest to be used to answer this question: Does history of stimulant usage vary among people within the three different IQ levels?
Automobile manufacturers are interested in the difference in reaction times for drivers reacting to traditional incadescent lights and to LED lights.
Of the 1,4000 homemakers sampled, 420 were able to identify the brand by name. Compute the standard error of the proportion.
Suppose wheat and sugar are two basic ingredients necessary to bake two items: a loaf of bread and a muffin. A baker has 25 pounds of wheat and 5 pounds of sugar.
How could the engineer increase the accuracy of the interval without changing the level of confidence?
hypothesis testing of single mean.a recent article in the wall street journal reported that the 30-year mortgage rate
Trevor is interested in purchasing the local hardware/sporting goods in the small town of Dove creek, Montana. After examing accounting records for the past several years
Rachel's Z score indicates that she is below average for those who took the ACT
A population consists of ten items, six of which are defective. In a sample of three items, what is the probability that exactly two are defective?
35 people that spend on average less than 62 minutes per day on facebook? Assume this is normally distributed. Find the chances of each to decide which is more likely, and by how much.
The firms are actually violating at least one regulaltion, what is the pmf of the number of firms visited by the inspector that are in violation of at least one regulation?
Standard deviation of sample was $3.53. Determine point estimate of population mean. Determine the 95% confidence interval of population mean. Suppose the variable is normally distributed.
A continuous random variable, x, is normally distributed with a mean of $1000 and a standard deviation of $100. Convert each of the following x values into its corresponding z-score.
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