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The sales of a local grocery chain, since 2008 are:
Year Y Sales ($ millions)2008 122009 92010 72011 132012 13
For full marks use the coded method and round your answer to 1 decimal place.
a) Find the slope for the trend-line.
b) What is the intercept of the trend-line.
c) Determine the least squares trend-line.
Given a normal distribution of data, we know from the Empirical Rule that in between 2 standard deviations from the mean
suppose x has an exponential distribution with mean equal to 10. determine followinga px gt 10b px gt 20c px gt
Write all the possible samples of size 2 and calculate the average or median of each one.
Assuming that the distribution of the costs is normal, what is the probability that the average for this sample is between $400 and $425?
calculate the value of the test statistic set up the rejection region determine the p-value interpret the result and
we want to estimate the mean population. a random sample of subjects is selected and the sample mean is computed. what
Employees what is the mean and standard deviation for the expected number of employees making more than $70,000 per year #question.
A company's headquarters is located in downtown Chicago. The company is interested to know the mean driving time of its employees if they require their employees to start working at 6:00 am. Fifty employees are randomly sampled over four weeks and..
If 64 students were randomly sampled, the probability that the sample mean of the sampled students exceeds 73.5 minutes is approximately 0.
Assume that the same sample mean was obtained from a sample of 120 items. Provide a 95% confidence interval for the population mean (to 2 decimals).
use the degree of confidence and sample data to constuct a confidence interval for the population proportion p.of 139
Barbara Flynn is in charge of maintaining hospital supplies at General Hospital. During the past year, the mean lead time demand for bandage BX-5 was 60 (and was normally distributed).
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