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Microsoft Corporation makes software packages for use in microcomputers. The company believes that if at least 25% of present owners of microcomputers of certain types would be interested in a particular new software package, then the company will make a profit if it markets the new package.
A company analyst therefore wants to test the null hypothesis that the proportion of owners of microcomputers of the given kinds who will be interested in the new package is at most 0.25, versus the alternative that the proportion is greater than 0.25.
A random sample of 300 microcomputer owners shows that 94 are interested in the new Microsoft package. Should the company market its new product? Report the p-value.
In this content unit we make the critical switch from "population mean" (or means) as the parameter of interest to inference around the population variance. Please think about examples where the parameter of interest would be the variance/standar..
Tell which measures are resistant to outliers and which are NOT resistant to outliers from the following list, and explain WHY or WHY NOT for each measure: Mean, median, Quartiles, correlation, and standard deviation.
There were a large number of foreclosures of family homes. In one large community, realtors randomly sampled 36 bids from potential buyers to determine the average loss in home value. The sample showed the average loss was $11,560 with a standard ..
For each of following data sets, select the most suitable response from choices below the table. A strong negative linear relation exists.
Imagine that you conducted a factor analysis on a set of variables that were uncorrelated with one another. How many factors would you expect to find? Why?
the skin cancer prevention study dataset can be found at the fitzmaurice website linked to the book applied
Determine the z value used to build a 90% confidence interval estimate of the population proportion. Give the positive value answer exactly as found from tables (three decimal places).
1.i have three groups for which i want to perform an anova. they have standard deviations s1 2.5 s2 3.4 s3 6.4 and
A paint manufacturer claims its paint will last an average of 16 years. Assume that paint life is normally distributed with a standard deviation of 3.2 years. Suppose a random sample of 20 houses are painted with this manufacturer's paint. What is..
the fda tests the tobaccos in two different types of cigars for nicotine content in mg and obtained following results.
what is the numeric value of z in the following equation p-z lt z lt z
What is the probability that the sum of their scores exceeds 1200 and probability that the average of the scores of all 400 student
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