ACTIVITY 1: NULL AND ALTERNATIVE HYPOTHESIS Direction: State the null hypothesis and the alternative hypothesis in (a) words and in (b) symbols for each of the following. Write your answer on the space provided. 1) A librarian of a school claims that all their grade 8 students read an average of 10 storybooks a month with a standard deviation of 2 books. A random sample of grade 98 students read an average of 12 books a month and a standard deviation of 1 book. The confidence statement is 95%.

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Q: For a standard normal distribution, find: P(z > 2.02) Express the probability as a decimal rounded ...

A: GivenP(z>2.02)

Q: Data were collected to explain the satisfaction rating a caller gives a customer representative base...

A: Solution: Given information: n= 10 observation  k=1 independent variable  β1^= -1.30   Slope of the ...

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A: Consider that the mean and standard deviation of a random variable X are µ and σ, respectively. Thus...

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Q: You wish to test the following claim (Ha) at a significance level of a = 0.05. d denotes the mean of...

A: a. Consider that µd is the true mean difference between pre-test and post-test scores. That, is µd =...

Q: (4) Suppose you roll a pair of fair dice, each with sides labeled 1, 2, 3, 4, 5, 6. Let X denote the...

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Q: Math 211 5.1 Practice Problems Emily Meeks Name MULTIPLE CHOICE. Choose the one alternative that bes...

A: Let Z be the random variable from the normal distribution with mean = 0 and standard deviation = 1. ...

Q: (2) Suppose you flip a fair coin four times and record the sequence of heads H and tails T that resu...

A: Binomial distribution : The binomial distribution is a probability distribution that expresses the p...

Q: Problem 1: A sample of 81 students enrolled in a “Reading Questions Carefully Seminar (RQCS)” was te...

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Q: Given: Below are scores of 10 selected students who have taken a 25 – item test in Problem Solving a...

A: Given The data is as follows: Scores in English Proficiency (x) Scores in Problem Solving (y) 1...

Q: 68.7% of the population have brown eyes. A convention has 6000 people in attendance. Find the mean (...

A: Given that - 68.7% of the population have brown eyes. A convention has 6000 people in attendance. 

Q: Now consider the textbook expense of all IUPUI students.  The mean and variance of textbook expense ...

A: Given,n=92x¯=$518.66σ2=15965.14α=1-0.95=0.05α2=0.025Z0.025=1.96      (from Z-table)

Q: Average weight of males in the age bracket of 20-39 is 198.5 pounds.  Assume population standard dev...

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Q: 40. A population with a mean of u=9 has EX = 72. How many scores are in the population? (SHOW

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Q: 24. A population has SS = 100 and o 2= 5. How many scores are in the population? а. 10 b. 20 с. 200 ...

A: 24) It is given that SS=100 and σ2 is 5.

Q: The following contingency table summarizes the drug test results for 401 test-takers: Positive Negat...

A:   Given problem Given that   For a randomly selected test administration, We have to find the Probab...

Q: . From the data given below, find: a) the two regression equations. b) the coefficient of correlatio...

A: Given data. X Y X*Y X*X Y*Y 25 43 1075 625 1849 28 46 1288 784 2116 35 49 1715 1225 2401 ...

Q: If one of the pedestrian deaths is randomly selected, find the probability that the driver was not i...

A: HERE GIVEN TABLE FOR RESULTS FROM PEDESTRIAN DEATHS  

Q: For a standard normal distribution, find: P(z < c) = 0.8343 Find c rounded to two decimal places.

A: Required probability is P(Z&lt;c)=0.8343

Q: Paula and Jill are playing a game. Paula will roll a die and Jill will guess the number that comes u...

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Q: Distribution A Distribution B Given the probability distributions shown to the right, complete the f...

A: Given  Distribution A xi P(x=xi) 0 0.46 1 0.25 2 0.14 3 0.12 4 0.03

Q: 8.45 (a) Find P(T < 2.365) when v = 7. (b) Find P(T > 1.318) when v = 24. (c) Find P(−1.356 < ...

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Q: An automotive service center would like feedback on its customer service. Each customer receives a p...

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Q: A teacher has a large container of blue, red, and green beads. She wants her students to estimate th...

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Q: a. What is the test statistic for this sample? Round to 4 decimal places. test statistic b. What is ...

A: Given The data is as follows: α=0.002 H0: μd=0H1: μd&lt;0d¯=-6.1sd=38.6n=48

Q: Р(А) %3D 0.35 Р(А and B) %3D 0.14Р(ВA) 3 ? Р(А and B) %3D 0.08 Р(BA) 3D 0.4 Р(A) %3D ? -1- Р(A and B...

A: We know that  P( A/B) = P( A ∩ B)/ P( B) And P( A and B )  = P ( A ∩ B )

Q: 42. After every score in a sample is multiplied by 5, the mean is calculated and found to be M = 100...

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Q: a) You watch a roulette wheel spin 4 consecutive times and the ball lands on a red slot each time. W...

A: Here In  the game Roulette  Total number of slots=38 No of Red Slots= 18 No of Black Slots=18 No of ...

Q: Let u; be the residuals in the lease square fit of Y; against X;, (i = 1,2, ... ,n) and a constant. ...

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Q: Find the missing probability. P(A) = 0.4 P(A and B) = 0.18 P(B|A) = ? P(A and B) = 0.1 P(B|A)=0.25 P...

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Q: For the data given below, calculate the index number by taking (i) 1980 as the base year (ii) 1987 a...

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Q: The sample type can best be described as: | 1.833 The critical value to Independent Samples be used:...

A: The provided information is: maxflo_b (sample 1) maxflo3m (sample 2) Difference=sample 1-sample 2...

Q: - If p(A) = 0, p(B) = and p(A and B) = 19 100, are A and B independent?

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Q: Here are data on the years of schooling completed, x, and annual income, y, (in thousands of dollars...

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Q: In a drag race, the age of contestants are normallydistributed with a mean of 24 yrs and a standard ...

A: X: age of contestantsX~N(μ,σ)where Mean(μ)=24 yrsand standard deviation(σ)=1.5 yrsfind P(22.5&lt;X&l...

Q: The amount of time an A&M student spends looking for a lost piece of paper per month is  N(1610, 16...

A: Given,meanμ=1610standard deviation(σ)=160sample size(n)=27

Q: a. the incidence (%) of CHD among smokers: b. the incidence (%) of CHD among non-smokers: c. the RR ...

A: Solution: a) The incidence rate of CHD among smokers here is computed as:= 180 / (3920 + 180) = 0.04...

Q: Is the following a Probability Distribution?   Select one: a. Yes, because all of the probabilities...

A: X 0 1 2 3 P(X) 0.45 0.35 0.28 -0.12

Q: Research examining the effects of preschool child- care has found that children who spent time in da...

A: a.   Assume that μ defines the population mean scores on math and language test of children with a h...

Q: How much would that company gain in the long run?

A: Here given, company makes electronic gadgets. One out of every 50 gadgets is faulty, but the company...

Q: 45. For this frequency distribution of exam scores: f How many students had scores lower than X = 85...

A: Given, X f 90-94 6 85-89 8 80--84 10 75-79 12 70-74 5

Q: Birth weights of babies born to full-term pregnancies follow roughly a normal distribution. At Meado...

A: Let X be the random variable from normal distribution with mean (μ) = 7 pounds, standard deviation (...

Q: Standardized measures seem to indicate that the aver- age level of anxiety has increased gradually o...

A: Given that - µ = 15.1 M = 23.3 n = 16 SS = 240

Q: A population has a mean μ=81 and a standard deviation σ=6. Find the mean and standard deviation of...

A: From the provided information, Mean (µ) = 81 Standard deviation (σ) = 6 X~N (81, 6)

Q: Suppose Netflix conducts a nation-wide survey to assess viewer habits regarding the show Ozark. Usin...

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Q: Every cereal box has a gift inside, but you cannot tell from the outside what the gift is. The store...

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Q: In a normal distribution, 10% of the items are over 125 and 35% are under 60. Then the mean value is...

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Q: The table summarizes results from 977 pedestrian deaths that were caused by automobile accidents. Pe...

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Q: Answer each of the following questions with complete sentences.  Include a brief explanation in comp...

A: Comment: As per the our comapny guidelines we are supposed to answer only three subparts,. Kindly re...