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Construct a frequency polygon using the distribution of grouped scores constructed in given Problem. Is the curve symmetrical or positively or negatively skewed?
Problem-A small eastern college uses the grading system of 0-4.0, with 4.0 being the highest possible grade. The scores shown here are the grade point averages of the students currently enrolled as psychology majors at the college.
a. Construct a frequency distribution of grouped scores with approximately 10 intervals.
b. Construct a histogram of the frequency distribution constructed in part a.
c. Is the distribution skewed or symmetrical? If skewed, is it skewed positively or negatively?
d. Construct a stem and leaf diagram with the last digit being a leaf and the first digit a stem. Repeat stem values five times.
e. Which diagram do you like better, the histogram of part b or the stem and leaf diagram of part d? Explain.
one article describes measurements of ammonium concentrations in mgl at a large number of wells in the state of iowa.
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Use the method of least squares to model the relationship between x and y.
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1. During his career in the NHL, hockey great Wayne Gretzky had the following season-total goals for each of his 20 seasons. Source: The World Almanac and Book of Facts 2000, p. 954.
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The stationary Gaussian random sequence Xn has expected value E[Xn] = 0 and autocorrelation function RX [k] = cos(0.04πk). Use gaussvector to generate and plot 10 sample paths of the form X0,..., X99. What do you appear to observe? Confirm your su..
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