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940 men and 969 women are polled; it's found that 216 of the men and 281 of the women belong to a gym. To a 5% level of significance, can it be asserted that, in general, a smaller percentage of men than women belong to a gym?

940 men and 969 women are polled; it's found that 216 of the men and 281 of the women belong to a gym. To a 5% level of significance, can it be asserted that, in general, a smaller percentage of men than women belong to a gym?

MATLAB: An Introduction with Applications
MATLAB: An Introduction with Applications
6th Edition
ISBN:9781119256830
Author:Amos Gilat
Publisher:Amos Gilat
Chapter1: Starting With Matlab
Section: Chapter Questions
Problem 1P
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54 bodybuilders who used the anabolic steroid Anavar reported a mean gain in muscle mass of 8.3 lbs., with a standard deviation of 2.1 lbs. 31 bodybuilders who used the veterinary anabolic steroid Equipoise reported a mean gain in muscle mass of 5.9 lbs., with a standard deviation of 1.9 lbs. To a 3% level of significance, can it be asserted that, in general, Anavar-using bodybuilders gain more muscle mass than do Equipoise-using bodybuilders? 940 men and 969 women are polled; it's found that 216 of the men and 281 of the women belong to a gym. To a 5% level of significance, can it be asserted that, in general, a smaller percentage of men than women belong to a gym?
Transcribed Image Text:54 bodybuilders who used the anabolic steroid Anavar reported a mean gain in muscle mass of 8.3 lbs., with a standard deviation of 2.1 lbs. 31 bodybuilders who used the veterinary anabolic steroid Equipoise reported a mean gain in muscle mass of 5.9 lbs., with a standard deviation of 1.9 lbs. To a 3% level of significance, can it be asserted that, in general, Anavar-using bodybuilders gain more muscle mass than do Equipoise-using bodybuilders? 940 men and 969 women are polled; it's found that 216 of the men and 281 of the women belong to a gym. To a 5% level of significance, can it be asserted that, in general, a smaller percentage of men than women belong to a gym?
85 people who are hypnotized are able to keep their hands in an ice-bucket a mean time of 294 seconds, with a standard deviation of 13.3 seconds. 121 people who are not hypnotized are able to keep their hands in an ice-bucket a mean time of 195 seconds, with a standard deviation of 19.4 seconds. To a 1% level of significance, can it be asserted that, in general, people who are hypnotized can keep their hands in ice-water for a longer average time than can people who are not hypnotized? Hypnotized Not Hypnotized A mass 8=29 5.8133 A 6, m = 900 ==.71 P= A=15 5.m Sony da R P-8¹ E (43.45 O Hardy fires 900 pistol shots at a target, and hits the bulls-eye with 711 of them. Fary fires 800 pistol shots at the target, and hits the bulls-eye with 640 of them. To a 2% level of significance, can it be asserted that, in general, Hardy hits the bulls-eye with a smaller percentage of his pistol shots than does Ear Hardy morey Fary Fill +60 (400+800) no sce = 1972(79) (Hop=gACCEPT! HA-P B = 30 26.01979 x² = (-E)² (35) (27) 1720 + H₂¹ U₁= H₂ √√#+%= √*• HA: 14₂7M₂ ACCEPT!!!!! z 16 2.2785 755 77 338 330 318 241 111 84 26 1720 120 400 360 320 240 12.0 80 40 (415) (0) (0 (((2) (3) (2) 7 (18) ↓ (x₂)) 10.376 + /*+14-205 -5053 51-2.05 NO! Professor Snerd's Theory of Plutonian Chiropteran Genetics asserts that 43% of all Plutonian Bats should be yellow, 18% should be green, 10% should be orange, 9% should be blue, 8% should be red, 6% should be pink, 3% should be purple, 2% should be psychedelic, and 1% should be white. 4000 Plutonian Bats are examined, and it's found that 1755 are yellow, 747 are green, 388 are orange, 330 are blue, 318 are red, 241 are pink, 111 are purple, 84 are psychedelic, and 26 are white. To a 1% level of significance, can it be asserted that Snerd's theory is wrong? 1% 4000YGOBRPi Pu Ps w (254-196) (8-5)-0's 2.2785 (.02 X-4000) (2-)-0 2% 01979 (79-80) -01979 120 + X²₂ 2.13-1 20.090 40 22 Ho Expert Right HA: Expert Wrong 12 ? YES!!!!!! Z ? NO!
Transcribed Image Text:85 people who are hypnotized are able to keep their hands in an ice-bucket a mean time of 294 seconds, with a standard deviation of 13.3 seconds. 121 people who are not hypnotized are able to keep their hands in an ice-bucket a mean time of 195 seconds, with a standard deviation of 19.4 seconds. To a 1% level of significance, can it be asserted that, in general, people who are hypnotized can keep their hands in ice-water for a longer average time than can people who are not hypnotized? Hypnotized Not Hypnotized A mass 8=29 5.8133 A 6, m = 900 ==.71 P= A=15 5.m Sony da R P-8¹ E (43.45 O Hardy fires 900 pistol shots at a target, and hits the bulls-eye with 711 of them. Fary fires 800 pistol shots at the target, and hits the bulls-eye with 640 of them. To a 2% level of significance, can it be asserted that, in general, Hardy hits the bulls-eye with a smaller percentage of his pistol shots than does Ear Hardy morey Fary Fill +60 (400+800) no sce = 1972(79) (Hop=gACCEPT! HA-P B = 30 26.01979 x² = (-E)² (35) (27) 1720 + H₂¹ U₁= H₂ √√#+%= √*• HA: 14₂7M₂ ACCEPT!!!!! z 16 2.2785 755 77 338 330 318 241 111 84 26 1720 120 400 360 320 240 12.0 80 40 (415) (0) (0 (((2) (3) (2) 7 (18) ↓ (x₂)) 10.376 + /*+14-205 -5053 51-2.05 NO! Professor Snerd's Theory of Plutonian Chiropteran Genetics asserts that 43% of all Plutonian Bats should be yellow, 18% should be green, 10% should be orange, 9% should be blue, 8% should be red, 6% should be pink, 3% should be purple, 2% should be psychedelic, and 1% should be white. 4000 Plutonian Bats are examined, and it's found that 1755 are yellow, 747 are green, 388 are orange, 330 are blue, 318 are red, 241 are pink, 111 are purple, 84 are psychedelic, and 26 are white. To a 1% level of significance, can it be asserted that Snerd's theory is wrong? 1% 4000YGOBRPi Pu Ps w (254-196) (8-5)-0's 2.2785 (.02 X-4000) (2-)-0 2% 01979 (79-80) -01979 120 + X²₂ 2.13-1 20.090 40 22 Ho Expert Right HA: Expert Wrong 12 ? YES!!!!!! Z ? NO!
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