2010-02-08_032909_Moviegoer_Correlation_Hypothesis

2010-02-08_032909_Moviegoer_Correlation_Hypothesis - (f)...

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Regression Analysis r² 0.085 n 10 r -0.292 k 1 Std. Error 2.128 Dep. Var. Spent (y) ANOVA table Source SS df MS F p-value Regression 3.3727 1 3.3727 0.74 .4133 Residual 36.2396 8 4.5299 Total 39.6123 9 Regression output confidence interval variables coefficients std. error t (df=8) p-value 95% lower 95% upper std. coeff. Intercept 6.9609 2.0885 3.333 .0103 2.1449 11.7770 0.000 Age (x) -0.0530 0.0614 -0.863 .4133 -0.1946 0.0886 -0.292
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12.4 Moviegoer Spending ($) on Snacks (a) Make a scatter plot of the data. What does it suggest about the correlation between Age (x) Spent (y) 30 2.85 (a) Scatter Plot: 50 6.5 34 1.5 12 6.35 37 6.2 33 6.75 36 3.6 26 6.1 18 8.35 46 4.35 The scatter plot shows points randomly scattered about the (b) Correlation coefficient is R = -0.2918 This value is very low and confirms the poor correlation betw (c) t0.05 = -2.31 (d) t- score = -0.863 (e) Critical r = -0.632 [Using the Table from http://www.gifted
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Unformatted text preview: (f) No, we fail to reject Ho: r = 0, There is no sufficient eviden 10 15 20 25 30 35 4 2 4 6 8 10 f(x) = -0.05x + 6.96 R = 0.09 Age Spent X and Y? (b) Use Excel, MegaStat, or MINITAB to calculate the correlation coefficient. (c) Use Excel or Appendix D to find t regression line. This means the amount spent and age of the moviegoer are poorly correlated. ween age of the moviegoer and the amount spent. d.uconn.edu/siegle/research/correlation/corrchrt.htm] nce that the correlation is significant. 40 45 50 55 t.05 for a two-tailed test. (d) Calculate the t test statistic. (e) Calculate the critical value of ra. (f) Can you reject ? = 0? Age X. ................ 30, 50, 34, 12, 37, 33, 36, 26, 18, 46 Spent Y. .......... 2.85, 6.50, 1.50, 6.35, 6.20, 6.75, 3.60, 6.10, 8.35, 4.35...
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This note was uploaded on 06/20/2011 for the course ACCT 101 taught by Professor Joannes during the Spring '11 term at Aarhus Universitet.

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2010-02-08_032909_Moviegoer_Correlation_Hypothesis - (f)...

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