Statistics Final Exam Statistics Final Exam Multiple Choice Latest 2023 with complete solution

Statistics Final Exam Problem 1. Determine whether the value given below is from a discrete or continuous data set. In a test of method of gender selection, 668 couples used the XSORT method and 451 of them had baby girls. A discrete data set because there are a finite number of possible values. Problem 2. Use the data consisting of IQ score and brain volume (cm3) The regression equation is y ̂=101.32160+0.00669x (if not try with y = 1074.84017 + 1.01199) Problem 3. Refer to the accompanying data set and use the 25 home voltage measurements to construct a frequency distribution with five classes. Begin with a lower class limit of 122.6 volts, and use a class width of 0.2 volt. Does the result appear to have a normal distribution? Why or why not? Complete the frequency distribution below. Voltage (volts) Frequency 122.6 – 122.7 5 122.8 – 122.9 6 123.0 – 123.1 4 123.2 – 123.3 5 123.4 – 123.5 5 Does the result appear to have a normal distribution? Why or why not? No, because the frequencies are roughly equal across the voltage classes. Problem 4. The data show the number of viewers for television stars with certain salaries. Find the regression equation, letting salary be the independent (x) variable. Salary (millions of $) 98 7 13 12 3 13 10 2 Viewers (millions) 3.5 6.8 6.3 10.2 7.5 4.4 1.8 2.7 What is the regression equation? y ̂=6.001+(-0.024)x (If not try with y = 19.750 + 0x)