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Write the R code that you would use to determine the names of the variables (columns) in a basic data-frame.
Test the data for normality. If the data are not normal, try a suitable transformation to make the transformed data approximately normal.
What percent of these workers could not operate the switch with either hand?- Are success with right and left hands independent events? Explain.
According to Central Limit Theorem, how big of sample is essential to be sure sampling distribution of sample means is normally distributed.
consider the height of a person as a random variable. some possible random variables include time a person wakes up in
A plus four 95% confidence interval for the difference between the two population proportions of wrist injuries is: A. 0.2909 ± 0.1674. B. 0.2909 ± 0.1069. C. 0.2909 ± 0.0907. D. 0.2909 ± 0.1275
According to T-100 Domestic Market, the top seven airlines in the United States by domestic boardings in a recent year were Southwest Airlines with 81.1 million, Delta Airlines with 79.4 million, American Airlines with 72.6 million, United Airline..
A hospital human resources manager finds that the local average starting salary for nurses is $24,000. She randomly samples 10 nurse's salaries at the hospital and calculates a mean of $23,450 and a standard deviation of $400.
The eight kings and queens are removed from a deck of cards and then two of these cards are selected. What is the probability that the king or queen of spades.
A research firm claims that 62% of women in the 40-49 age group save in a 401(k) or individual retirement account. - Would the test be a z-test or a t-test? Why?
The consequences of the central limit theorem is that if we end up averaging the measurements of a particular quantity, the distribution of an average tends on going toward a normal one?
Analyze the data with Microsoft Excel or other statistical tool. For normally distributed data use the mean and standard deviation. For significantly skewed data use the median and interquartile range.
Find the margin of error for the given values of c, s, and n. How many subjects are needed to estimate the number of books read the previous year within one book with 99% confidence?
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