7 Answered Questions for the topic Inferential Statistics

Inferential Statistics

07/10/18

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
Inferential Statistics

07/10/17

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
Inferential Statistics

07/10/17

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
Inferential Statistics Statistics Probability Joint Probability

01/21/17

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

02/26/16

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
Inferential Statistics

02/24/16

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

01/17/16

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

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