According to data on the state of iowa, the amount of water used for cooking per household per month is normally distributed, with a standard deviation of 10.4 liters. a survey was carried out to estimate the population mean. with a sample size of 60 households, the mean quantity of water used for cooking was found to be 62.6 liters.
there is a 95% chance that the population mean lies between liters and liters.
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17. a researcher measures three variables, x, y, and z for each individual in a sample of n = 20. the pearson correlations for this sample are rxy = 0.6, rxz = 0.4, and ryz = 0.7. a. find the partial correlation between x and y, holding z constant. b. find the partial correlation between x and z, holding y constant. (hint: simply switch the labels for the variables y and z to correspond with the labels in the equation.) gravetter, frederick j. statistics for the behavioral sciences (p. 526). cengage learning. kindle edition.