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The time required to assemble an electronic component is normally distributed with a mean and standard deviation of 16 minutes and 8 minutes, respectively.
a. Find the probability that a randomly picked assembly takes between 10 and 20 minutes. (Round "z" value to 2 decimal places and final answer to 4 decimal places.) Probability=
b. It is unusual for the assembly time to be above 24 minutes or below 6 minutes. What proportion of assembly times fall in these unusual categories? (Round "z" value to 2 decimal places and final answer to 4 decimal places.) Proportion of assembly times=
One of the problems encountered by corporations in America is finding an adequate number of employees who want to move into management. Recent surveys of workers in America taken by the Department of Labor in Washington D. C.
In 2001, the US Department of Labor reported the average hourly earnings for US production workers to be $14.32 per hour. A sample of 75 production workers during 2003 showed a sample mean of $14.68 per hour.
one method for assessing the effectiveness of a drug is to note its concentration in blood andor urine samples at
Overtime happens after eight hours of work on given day. Determine the probability that letter carrier works overtime on any given day?
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:
supplier on-time delivery performance is critical to enabling the buyer? organization to meet its customer service
A system consists of five identical components connected in parallel. Determine the reliability of the components such that the system reliabilty is 97%.
Construct a frequency distribution of the sample mean, and plot a histogram of this distribution. Use the central limit theorem to calculate and identify the sampling distribution of the sample mean.
Which are likely to be independent events? For those you think are not, suggest reasons why.
State the null hypothesis and the alternate hypothesis. State the decision regarding the null hypothesis.
question describing data frequency distribution and graphic presentationsyou are the parts manager for a local dumb
Mention all samples of size 3, and compute the mean of each sample. Compute the mean of the distribution of sample means and the population mean.
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