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Constructing a scatter plot and determining correlation.
a. display the data in a scatter plot,
b. calculate the correlation coefficient f, and
c. make a conclusion about the type of correlation.
Earnings and Dividends. The earnings per share and dividends per share for 10 telecommunications services companies in a recent year.
Earnings per share, x 2.34 1.96 1.39 3.07 0.65Dividends per share, y 1.33 1.07 1.15 0.25 1.00
Earnings per share, x 5.21 0.88 3.23 2.54 1.03Dividends per share, y 1.00 1.59 1.20 1.62 0.20
At the .01 significance level, is there a difference in the use of the four entrances?
Develop a scatter diagram for the data and write a brief summary.
Report descriptive statistics, assumptions tests, effect sizes (partial eta) as well as tests of statistical significance.
Scores on certain nationwide college entrance examination follow normal distribution with mean of 500 and a standard deviation of 100. Determine the probability that student will score?
A researcher discovers the number of parking tickets that a group of students have received during their driving careers. Twenty students reply and they have received between 9 and 20 parking tickets.
Would the method described above be a good way to determine which team was taller (explain why or why not)?
Find out sample correlation coefficients of (I) age with dry weight, and (2) age with log 10 dry weight. Interpret your results.
Which of the examples below represent the Ratio level of scaling?
Note down a research that requires a decision making with probabilities.
Assume the observed value of the test statistic is 1.53. What is the smallest level for which there is sufficient evidence to reject H 0 (i.e. the p-value for this test)?
Employer wishes to interview only those applicants who score in top 15%. What must cut-off score be for interviews?
Following data represent concentration of dissolved organic carbon (mg/L) collected from 20 samples of organic soil. Sample standard deviation is?
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