hodate cars and buses. The toll for cars is $3, and the toll for buses is $10. Let X and Y denote the number of cars and buses, respectively, carried on a single trip. The joint pmf of X and Y is given in the table below. y p(x, y) 0 1 2 0 0.100 0.060 0.040 1 0.050 0.030 0.020 2 0.125 0.075 0.050 3 0.025 0.015 0.010 4 0.050 0.030 0.020 5 0.150 0.090 0.060 X It is readily verified that X and Y are independent. (a) Compute the expected value, variance, and standard deviation of the total number of vehicles on a single trip. (Round your standard deviation to two decimal places.) expected value 3.35 ✔vehicles 11.75 X 2.06 variance standard deviation (b) If each car is charged $3 and each bus $10, compute the expected value (in $), variance, and standard deviation (in $) of the revenue resulting from a single trip. (Round your standard deviation to two decimal places.) expected value $14.95 variance standard deviation ✔vehicles $ x

how do you find the variance of the mean squared errors from this tabe

If no data values are given but the mean and standard deviation is given how do I find the variance with just this information?

Explain what restriction of range is and what it tends to do to the magnitude of a correlation.

Professor Hayashi has implemented a new book for his Fall 2013 statistics course. He wants to see if the new book has an effect on the exam average for Exam 3. He knows that the Exam 3 mean for all students who have taken his statistic course over the past 10 years is 77.2. He collects some data from a sample of 9 students and finds that the Exam 3 mean for his Fall 2013 statistics students is 81.7 with a variance of 32.49.Measure effect size using percentage of variance

Explain the t-test as it relates to its application to one samples