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Problem:
(year and sales)
-iphone 3GS (2009)- $20.73 mil
-iphone 4 (2010)- $39.99 mil
-iphone 4s (2011)-$72.3 mil
-iphone 5 (2012)- $125.04 mil
-iphone 5s & 5C (2013)- $150.26 mil
-iphone 6&6plus (2014)-$169.22 mil
-iphone 6s &6s plus (2015)- $231.22
-iphone 7&7plus (2016)- $211.88 mil
-iphone 8 & 8plus & iphone X (2017) -$216.76 mil
-iphone XS & XS max & XR (2018) - $217.72 mil
A manufacturer of PC monitors is interested in the effects that the type of glass and the type of phosphor used in the manufacturing process.
a. Calculate a 95% confidence interval for the average cost of accessories on Mini Coopers. b. Determine the margin of error in estimating the average cost of accessories on Mini Coopers.
Given the nature of the population distribution, would we expect the distribution of sample means to be at least approximately normally distributed? Generate a histogram of the sample means and comment on the shape of the distribution.
The Crusades: What were the causes and some of the consequences of the Crusading movement? Consider the roles and the motivations of the Byzantine Emperor, Pope Urban II, European monarchs and the individuals
directions answer each of the following questions. show your work or explain how you arrived at your conclusion
How large could a tumor grow before a researcher might consider it to be an outlier and would want to double check the measurement.
Estimate a simple linear regression model and present the estimated linear equation. Then, interpret the coefficient estimates of the linear model
how would you define a variable? what is the difference between a dependent and independent variable? do you think both
Are the differences found between the HSS majors and Business majors statistically significant?
Based on the data, determine the 95 percent confidence interval evaluate for true population mean?
Explain why the sampling distribution of sample mean follow the normal distribution in this case.
consider the following marble game a box contains m red marbles and n blue marbles n m gt 0 and a fixed number - here
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