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Create a dataset of at least 50 observations (from your workplace or personal experiences). Calculate the descriptive statistics of mean, median, mode, standard deviation and range of the data. What conclusions can you draw from the data? Graph the data using a bar chart, histogram or pie chart. Why did you choose the chart that you did? Does your graphical approach tell you anything different from the previous descriptive statistics you calculated? Which approach is more meaningful to you and why.
A counseling psychologist is interested in determining whether the perception of a counselor's expertise is affected by the approach the counselor utilizes.
Suppose you obtain a 100 bag random sample by taking 25 subgroups of 4 bags each, the mean weight of the 25 subgroups was 16.00 ounces with a total of the subgroup ranges of 87.5 oz.
The box plots below show the real estate values of single values of single family homes in two neighboring cities, in thousands of dollars.
Calculate sample proportion and then also calculate a 99% confidence interval for true population proportion, p.
What is the difference between the mean of the two groups? What is the difference in the standard deviation?
The manufacturer then changes a manufacturing process and produces another batch and again measures the MTBF. Did the change to the process improve the MTBF?
a businessweek north american subscriber study collected data from a sample of 2861 subscribers. fifty-nine percent of
from 8 names on a ballot a committee of will be elected to attend a political national convention. how many different
we must be able to assign a probability distribution or probability function to the random variable X. So, what is the distribution of X when X ~ bin(n, p)?
Using a 2-month weighted moving average, with weights of 2 for the most recent month and 1 for the previous month develop forecasts sales for March to June inclusive.
1.a manufacturer of infant formula is running an experiment using the standard control formula and two new formulas a
the number of ratios in each household in a country. is this a population or sample?the ages of three families of
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