4. The table given below shows the data obtained during outbreak of smallpox: Attacked 31 Not attacked 469 Total 500 Vaccinated Not vaccinated Total Test the effectiveness of vaccination in preventing the attack from smallpox. with the help of x2 at 5 per cent level of significance. 185 1315 1500 216 1784 2000 Test your result

Q: question 19

A: a)The two methods to test the difference in mean are: z-test t-test

Q: Find the derir

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Q: EC an

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Q: 6) Find f'(-2) for each of the following functions.

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Q: Sec o

A: The solution is given in the next step.

Q: 16. The data in the accompanying table ecological study of the entire rainforest commu- bo nity at…

A: Given data for animal species having each diet breath; Diet Breath Frequency 1 21 2 8 3 9…

Q: 18 and 19

A: Question 18 : Consider the statement "If A∪C ⊂ B∪C, then  A ⊂ B " which of the following is a…

Q: Question 20

A: Given Data :  General form of the sequence an=2(an-1)+1, a1=4 To Find : The first four terms of the…

Q: Coga 2.

A: we have to find, log7(6)÷log7(3)+log7(2)=?

Q: 20. f(x) = e*(x- 2), on the intervals (a) [-2, 2] (b) (0,3) (c) [0, 00) (d) (-0o, 0]

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Q: fvalante (3+1)t

A: This is improper integral of first kind, limit is ♾️

Q: Parts A and B please

A: a) It is given that, a box has square base of side x and height h. The volume is 15 and surface area…

Q: Question 54

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Q: Can you do d, e, and f?

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Q: thic Sint Costock

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Q: 14 and 16

A: “Since you have asked multiple questions, we will solve the first question for you. If you want any…

Q: Given sec 8= 190 √6 3 what is cos?

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Q: AND THIS sum !

A: Given : ∑N =1∞2NN+2

Q: Question 11

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Contingency Table

A contingency table can be defined as the visual representation of the relationship between two or more categorical variables that can be evaluated and registered. It is a categorical version of the scatterplot, which is used to investigate the linear relationship between two variables. A contingency table is indeed a type of frequency distribution table that displays two variables at the same time.

Binomial Distribution

Binomial is an algebraic expression of the sum or the difference of two terms. Before knowing about binomial distribution, we must know about the binomial theorem.