7 Answered Questions for the topic Inferential Statistics
The cruising altitude for the fleet of one commercial airline are normally distributed with a mean of 34,950 and a standard deviation of 1830 feet. Determine the percentage of flights that have a... more
During one season of racing at the Talladega Superspeedway,
During one season of racing at the Talladega Superspeedway, the mean speed of the cars racing there was found to be 158.9 mph with a standard deviation of 6.7 mph. What speed represents the 30th... more
The heights of American women ages 18 to 29
The heights of American women ages 18 to 29 are normally distributed with a mean of 64.3 inches and standard deviation of 3.8 inches. An American woman in this age bracket is chosen at... more
Need Help finding constant C in joint pmf for two discrete variables
Determine the constant c so that f (x, y) satisfies the conditions of being a joint pmf for two discrete random variables X and Y: f (x, y) = c(1/4)^x * (1/3)^y, where x = 1, 2, . . . , y = 1,... more
INFERENTIAL STATISTICS - please help me. thanks!
D.G Co. claims that the average gross sales of their products in all their branches is 37 million/ week with a standard deviation of 6 million. A certain researcher found out that the average gross... more
a coin s tossed 20 times resulting in 5 heads. Is this sufficient evidence to reject the hypothesis at the 0.03 level of significance that the coin is balanced?
we are trying to get the significance of the null and alternative hypothesis using a method such as chi square or z test
Test significance of the correlation between the General Weighted Average and the daily allowance of junior students at ? =0.05.
GWA of Junior Students (Non-Working)/ Daily Allowance1.9 /1502.3/ 1202.2 /1102.9 /1001.4/ 1002.4 /1001.7/ 1002.4 /1002.1 /1002 /802.4 /802 /801.2/ 753.2 /752.4 /702.5 /701.1 /701.3 /702.8 /702.8... more