Chapter 20 1. You are testing Ho:µ = 100 against Ha:µ < 100 based on an SRS of 16 observations from a Normal population. The data give ī = 98 and s = 4. The value of the t-statistic is: a) -8 b) -2 c) -0.5 2. You are testing Ho: µ = 100 against Ha:µ > 100 based on an SRS of 9 observations from a Normal population. The t statistic is t=2.10. The P-value for the statistic a) falls between 0.05 and 0.10 b) falls between 0.01 and 0.05 c) is less than 0.01 3. You have an SRS of four observations from a Normally distributed population. What critical value would you use to obtain an 80% confidence interval for the mean µ of the population? a) 1.533 b) 1.638 c) 2.353 4. You are testing Ho: µ = 0 against Ha:H # 0 based on an SRS of four observations from a Normal population. What values of the t statistic are statistically significant at the a=0.005 level? a) t> 7.453 b) t< -7.453 or t> 7.453 c) t< -5.598 or t> 5.598 5. Which of these settings does not allow use of a matched pairs t procedure? a) You interview both the instructor and one of the students in each of 20 introductory statistics classes and ask each how many hours per week homework assignment require. b) You interview a sample of 15 instructors and another sample of 15 students and ask each how many hours per week homework assignments require. c) You interview 40 students in the introductory statistics course at the beginning of the semester and again at the end of the semester and ask how many hours per week homework assignments require.

Q: 1+1(9)-20

A: The given expression is 1+1(9)-20 When we multiply any number by 1 the result is 1. So when we…

Q: Multiply. 3v 4v +2 6y +3 y /12

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Q: 3

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Q: 3.9b + a3 + 27 - 3a2 + 5a3 - 2a2 + 2.1b + 7

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Q: y X (9, –3)

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Q: 1b+1b

A: Applying  addition operation since terms with same variable  binomial addition

Q: 目 +8 LI +T 现 +04 +C4 |F|E|F|| ||||4 4 4 2 2

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Q: Which of the following graphs represents the function g(x) = x²(x + 1)(x − 2)? 2 4 2 * 0 4 0 O 4 2 P…

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Q: 2070 = (16a + 10)15

A: 2070 = (16a+10)15 And (16e+11)17 =3723 To find  the values of a and e

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Q: w + (-7), when w = - 1

A: The expression is given by w+(-7) To evaluate: The value of the expression when w=-1.

Q: 1 + 2n < n° for all integers n² 2

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Q: 3 5 - Let C= 2 6 |. Find - 5C. - 1

A: The given matrix is                                C=-3   5  2   6  0-1 We have to find -5C.

Q: 4 1 x-1 4 | 45. +3 x-1

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Q: 2(3w+8)=40

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Q: Evalvate S (4sin co) -8cos co) )do

A: Given that: ∫0π(4sinθ-8cosθ)dθ

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Q: -7 -5 Let A = Find -2A. 2] 1.

A: Given, A=-7-512

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.