Question

executive claims that the number of fatal accidents which occur in her state does not vary from month to month. The results of a study of 171 fatal accide of fatal accidents between each month? ents were recorded. Is there enough evidence to reject the highway department executive's clairm Month Jan Feb Mar pr May Jun Jul Aug Sep Oct Nov Dec Fatal Accidents |22 8 8 17 8 10 23 11 13 13 20 18 Copy Data Step 1 of 10: State the null and alternative hypothesis Answer 2 Points rev Ho: Number of tatal acciients does vary from month to month Nmber of fatal accidents does not vary from month to mondh Ho Number offatal accidents coes not vary tront moneh to mont A highway department executive claims that the number of fatal accidents which occur in her state does not vary from month to month The results of a study of 171 f fatal accidents were recorded. Is there enough evidence to reject the highway department executive's claim about the distribution of fatal accidents between each month? lan Feb Mar Apr MaynAug Sep Oa NovDec Fatal Accldents 22 17 8 10 2311 13 13 20 18 Step 2 of 10: What does the null hypothesis indicate about the proportions of fatal accidents during each month? Tables dReyc Answer 2 Points O The proportsions of fatal accidents during each month are ali hought to be equal C The ents d ghway department executive claims that the number of fatal accidents which occur in her state does not vary from study of 171 fatal accidents were recorded. Is there enough evidence to reject the highway department executive's atal accidents between each month? Month Jan eb Mar AprMay Jun Jul Aug Sep OctNo Ded Fatal Accidents 228 17 8 10 23 11 13 13 20 18 end aiternative hypothesis in terms of the expected proportions for each category. ver 2 Points Tables s some difference No of 21 Step 4f o 2 ay department executive claims that the number of fatal accidents which occur in her state does not vary from month to dy of 171 fatal accidents were recorded. Is there enough evidence to reject the highway department executive's claim abo accidents between each month? Month aeb Mar Apr MayJun ul Aug Sep Oct Nov Dec Fatal Accidents 228 817 810 23 11 13 13 20 18 ep 4 of 10: Find the expected vatue for the number of fatal accidents that occurred in january. Round your answer to two decimal E Tables nsweriHow to Enter 2 Points 6 8 of 21 Step 5 of 10 n 2 way department executive claims that the number of fatal accidents which occur in her state does not vary from month to mont tudy of 171 fatal accidents were recorded. Is there enough evidence to reject the highway department executive's claim about the al accidents between each month? Month Jan Feb Mar Apr MayJun Jul Aug Sep Oct Nov Dec Fatal Accidents 22 88178 10 23 11 13 13 20 18 step 5 of 10: Find the expected value for the number of fatal accidents that occurred in May Round your answer to two decimal places. AnswerHow to Enterl 2 Points Tables of 21 Stpso estion 2 fatal accidents which occur in her state does not vary from month to m highway department executive claims that the number of f a study of 171 fatal acidents were recorded. is there enough evidence to reject the highway department executive's dlaim abou f fatal accidents between each month? Month Jan eb Mar Apr May Junul Aug Sep Oct Nov Dec Fatal Accidents 22 88 17 8 10 23 1 3 13 20 18 Step 6 of 10: Find the value of the test statistic Round your answer to three decimal places m Tables Answenthow to Enter) 2 Points 8 9 of 21 Step 7 of 10 Question 2 Ahighway deparntx claims that the number of fatal accidents which occur in her state does not vary from month to month of a study of 171 fatal accidents were recorded. Is there enough evidence to reject the highway department executive's claim about the w of fatal accidents between each month? MonthJan Feb Ap May Junu Aug Sep Oct Nov Dec Fatal Accidents 22 88 1710 23 1 13 13 20 18 Step 7 of 10: Find the degrees of freedom associated with the test statistic for this problem Tables AnswerHow to Enber) 2 Points Prev Oo 苷e@e t er 8 8 Question 2 of 21 Step 8 of 10 A highway department executive claims that the number of fatal accidents which occur in her state does not vary from month to of a study of 171 fatal accidents were recorded. Is there enough evidence to reject the highway department executive's claim ab of fatal accidents between each month? Fatal Accidents | 22| 8 | 8 | 17 | 8 | 10|23| il | 13 | 13| 20/ 18 Step 8 of 10: Find the critical value of the test at the 0.005 level of significance. Round your answer to three decimal places Answeriew to Enter) 2 Pois Tables rev 8 A highway department executive claims that the number of fatal accidents which occur in her state does not vary from month to m of a study of 171 fatal accidents were recorded. Is there enough evidence to reject the highway department executive's claim abou of fatal accidents between each month? Month Feb Mar Apr MayJunulA ep Oct Nov Dec Fatal Accidents 228817 810 23 1 13 13 2018 Step 9 of 10: Makke the decision to reject or fail to reject the nul hypothesis at the 0.005 level of significance. Answer 2 Points Tables 口t器 苳e@e 8 10 of 16 Step Question 2 A highway department executive claims that the number of fatal accidents which occur in her state does not vary from month to of a study of 171 fatal accidents were recorded. Is there enough evidence to reject the highway department executive's claim ab of fatal accidents between each month? Month Jan Feb Mar p May unJu Au SepNov Dec Fatal Accidents 22 88 17 8 10 23 11 13 13 20 18 Step 10 of 10: State the conclusion of the hypothesis test at the 0.005 evel of significance mi Tables Answer 2 Points 흐Theres not enough evidence to reject the dam that the number of fatal accidents does not vary from month to mom O There is enough evidence so reject the ciaim tha the nuimber ot fotat accidents does noe vary from month to acciderits does noe vary from month to month 45 6

Answer 1

1)
option B)

2)
option A)
3)
pi= 1/12

4)
E(n Jan) = n * pi = 171 *1/12 = 14.25

5)
E(n May) = 14.25

6)
TS = 26.593 {calculation in last}

7)
df = r-1 = 11

8)
critical value = 26.757

9)
fail to reject the null
10)
A) there is not enough evidence

t	O	Ei	(Oi- Ei)^2/Ei
1	14.25	22	2.730113636
2	14.25	8	4.8828125
3	14.25	8	4.8828125
4	14.25	17	0.444852941
5	14.25	8	4.8828125
6	14.25	10	1.80625
7	14.25	23	3.328804348
8	14.25	11	0.960227273
9	14.25	13	0.120192308
10	14.25	13	0.120192308
11	14.25	20	1.653125
12	14.25	18	0.78125
	171	171	26.59344531
		TS	26.59344531
		critical	26.75684892