Practicing skills in statistics. Drawing line of best fit by calculating by eye, describing the correlation, calculation Pearson's and Spearman's correlation.
Negative correlation. As prices increase, the number of tickets sold is likely to decrease. Causal. Less people will be able to afford tickets as the prices inc
15
Which r value best describes this data set? Why? r = 1, r = -0.4, r = 0.7
r = 0.7
15
Which r value best describes this data set? Why? r = 1, r = -0.4, r = 0.7
r = 1
15
Which r value best describes this data set? Why? r = 1, r = -0.4, r = 0.7
r = -0.4
10
How would you construct a scatter diagram for the data, by eye?
Mean point = (74.5, 74.1)
15
What is the population standard deviation of the mathematics test?
6.946221 == 6.95
15
What is the sample standard deviation of the art project?
7.680422442 == 7.68
15
Describe the relationship between the Mathematics and Art marks.
strong, negative, linear correlation: rP= -0.9296 == -0.930
15
What is the line of best fit, according to least squares regression?
a = -.975, b = 146.747
15
Describe the correlation between the two data sets.
strong, negative correlation
15
Calculate Pearson's product-moment correlation for the data.
rP = -0.874
15
Calculate Spearman's correlation coefficient for the data set.
rS = -1
25
What is the line of best fit, according to least squares regression?
a = -.273, b = 5.51
20
What is the sample standard deviation of the time in hours?
7.35
20
What is the population standard deviation of the water remaining in liters?