Many standard statistical methods that you will study in Part II of this book ar

Question

Many standard statistical methods that you will study in Part II of this book are intended for use with distributions that are symmetric and have no outliers. These methods start with the mean and standard deviation, x and s. For example, standard methods would typically be used for the IQ and GPA data here data104.dat.

(a) Find x and s for the IQ data. (Round your answers to two decimal places.)

(b) Find the median IQ score. It is, as we expect, close to the mean.
  

(c) Find the mean and median for the GPA data. The two measures of center differ a bit. (Round your answers to two decimal places.)

What feature of the data (make a stemplot or histogram to see) explains the difference?

Explanation / Answer

Rcode:

Answer:

sum of IQ=7772

mean of IQ=100.94

sample standard deviation of IQ=12.33

median of IQ=100

mean of GPA=8.143

median of GPA=9.000

Related Questions

Navigate

• Browse (All)
• Browse M
• Subjects

Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.