00:01
Hello students, for the given question, the null hypothesis h0 is the violence against women involves same proportion of weapons employed as other violent attacks in us.
00:36
Now, the alternative hypothesis h alpha is the violence against women involves different proportion of weapons employed in other violent attacks in us.
01:07
Here, the total n is equal to 1654 attack that could be identified.
01:13
So, the expected number of gun attacks which is equal to 1654 into 63 .4 percentage which is equal to 1048 .64.
01:31
Then, the expected value of knife attack is equal to 1654 into 13 .1 percentage is equal to 216 .67.
01:45
Then, the expected value of other weapon attack is equal to 1654 into 16 .8 percentage we get 277 .87.
01:59
Then, the expected value of personal attack which is equal to 1654 into 6 .7 percentage we get 110 .82.
02:15
Now, the chi -square table that is here attack and the observed values then the expected value then y minus ei square by e which is here the gun, knife, other weapon and then personal at last the sum or total the observed values are 861, 364, 214, 215 we get 1654.
02:51
Then, the expected values are 1048 .64, 216 .67, 277 .87, 110 .82 then the sum is 1654.
03:04
Then, the values are 33 .57, 100 divided 0 .17, 14 .68, 97 .94...