what exactly is a statically significant difference (Links to an external site.)? For example, if you had two data sets with an observed difference between them what makes that difference "statistically significant"????

Q: Kathryn has classes 4 days a week. She attends the class 4 days a week 60% of the time, 3 days 20%…

A: Given: Kathryn has classes 4 days a week.  She attends the class 4 days a week 60% of the time, 3…

Q: A jar contains 5 orange, 4 white, and 3 red marbles. Two marbles are drawn without replacement from…

A: Solution

Q: What is the smallest possible value that P[A ∩ B] can be?

A: HERE , Consider two events, A and B, with P[A] = 60%P[B] = 40%.

Q: unction. The probability of malfunction on any given day is 0.40. Machine unctions on different days…

A:

Q: In an 8-item Mathematics quiz, how many ways can you select 6 problems to solve? a. 28…

A: As per company guidelines I solved only First questions

Q: Consider the probability distribution for number of children in local families. Probability…

A: For the given data find Mean =? s.d =? 4 significantly high ?

Q: each item. 1. C(8, 3) = 2. C(n, 4) = 15 3. C(8, r) = 28 4. C(9, 9) = 5. C(n, 3) = 35 6. C(10, r) =…

A: (4) The number of ways is,

Q: F. 9. From a class of 32 girls and 18 boys, how many study groups of 3 girls and 2 boys can be…

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Q: b) Keep-Fit gymnasium offers four types of subscriptions, Gold, Silver, Bronze and Platinum. It was…

A:

Q: You are given P[AUB]=0.7 and P[AUB']=0.9. Calculate P[A].

A:

Q: 13. Foofy studies if hearing an argument in favor of an issue alters participants' at- titudes…

A:

Q: B. Solve. SHOW YOUR SOLUTIONS. The average number of milligrams (mg) of cholesterol in a cup of a…

A: B) Solution: Given information: n= 10 Sample size  μ= 660 Population mean σ= 35 Population standard…

Q: 13. Which of the following are mutually exclusive event when a pair of die is rolled? * A. Getting a…

A:

Q: 2. Suppose that we wish to test the null hypothesis that the different colours of a popular brand of…

A: From the given information, the colours of candies are red, blue, brown, orange, green and yellow.

Q: Columbia College student staying alive?      b.        Barnard student remaining alive?

A:

Q: The accompanying summary data on Ceo, particle sizes (nm) under certain experimental conditions was…

A:

Q: There are three stores in an area, with characteristics as follows: Store Travel time (average) Size…

A: Huff's law of shopper's attraction is in the form: Pij=Sj(Tij)λ∑jnSj(Tij)λ Pij= Probability that…

Q: (a) What is the probability that the receiver gets a 0? (b) If the receiver gets a 0, what is the…

A: Let us define some events A : the system transmits 0 B : the system transmits 1 E : the receiver…

Q: Σ-) Σ- Ν and Σ(-) γ -) Σxy - NT (d) Use the least squares estimates from part (b) to compute the…

A: Given data for x and y We have to calculate variance with the help of regression analysis.

Q: .Find the following probabilities if the probability that it is windy is 0.4 .A- The weather should…

A: Let us define some events A : the weather is overcast. B : the weather is windy. It is given that…

Q: DECIMAL FORM: 146 148 150 152 155 157 160 163 164 165 167 170 171 172 p(x) 0. 118 | 0.029 0.059| 0.…

A: Let X be the random variable having probability mass function then we will find the mean variance…

Q: It is known that of the articles produced by a factory, 20% come from Machine A, 30% from Machine B,…

A: Let define the events: A =  articles produced by a Machine A B =  articles produced by a Machine B…

Q: Pr(A) = 0.5 Pr(B|A) = 0.2 Pr(B|A') = 0.8 Hence, fill in the tree diagram below: A B' В A' B' B

A:

Q: ACTIVITY 2. Show your complete solution The mean number of broadsheet copies sold at a stand is 80…

A: Given that  X~N(μ= 80 , σ= 4 ) μ= 80 , σ= 4 Formula for Z-score Z=(X-μ)/σ Note: According to…

Q: 1. Given the following Bayes network, Compute R(A=T, C=T) A P(B) P(-B) B P(A) P(-A) F 0.4 T 0.01 0.6…

A: Given

Q: Find the mean of the random variable X with the given probability mass function. 1 3 4 p(x) .05 .20…

A:

Q: Managers of an industrial plant want to determine which of two types of fuel, gas or electric, is…

A:

Q: probability: Pr (2 aces)

A: Here use hypergeometric distribution

Q: The Blacktop Speedway is a supplier of automotive parts. Included in stock are 5 speedometers that…

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Q: 2. Dylan, Andrew, Hailey, and Jordan ran in a race of 25 people. In how many different orders can…

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Q: One personality test available on the World Wide Web has a subsection designed to assess the…

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Q: 14. A repairman is scheduled to stop by a customer's house between 3pm and 5pm. The customer got…

A: Here Given A repairman is scheduled to stop by customers house between 3 PM and 5PM. And There is…

Q: What is the probability that a number selected at random from the first 50 positive integers is…

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Q: 6. Given the following statistics, what is the probability that a woman has cancer if she has a…

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Q: A box contains the following peso bills with the specified quantities. Number of Pieces p(x) P 20 30…

A: Given data is  x No. of pieces P(x) P20 30   P50 10   P100 5   P500 2

Q: 2. Let X and Y denote independent random variables with respective probability density func- tions…

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Q: Dengue fever viruses are carried by mosquitoes. There are several different serotypes of the dengue…

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Q: For mutually exclusive events A and B, P(A)=0.32 and P(B)=0.35 Find P(A | B) А) о в) 0.112 c)…

A: We have given that the two events A and B. P(A) = 0.32 P(B) = 0.35

Q: B. In a study of the effectiveness of physical exercise in weight reduction, a group of 16 persons…

A: There are two samples which are weight before and weight after. We have to test whether the…

Q: 6. Consider a normal distribution whereu = 80 and o 8 and answer the following: %3D a. If x 72, what…

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Q: A coin is biased so that its chances of landing Head is 2⁄3. If the coin is flipped 3 times, the…

A: The outcomes of flipping a coin are Head (H) and Tail (T).

Q: A number is chosen at random from 1 to 99. What is the probability that the number contains 2 or 3?

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Q: 4 In a restaurant in California, 3 out of 5 customers ask for water with their meal, If a sample of…

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Q: You randomly select one card from a​ 52-card deck. Find the probability of selecting the five of…

A: We have given that probability of selecting the five of spades or the three of clubs We have to find…

Q: Exercise 6. Using the MGF given by Equation (24), deduce the expressions for the mean and variance…

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Q: 7. Ken is thinking a special type of password which consists of four different numbers using digits…

A: Given digits is 0 to 9.

Q: Exercise 8. Suppose X1, X2, , Xn are independent random variables with X; ~ N(Hi, o), 1<i<n. If X =…

A:

Q: 2. The daily demand for copies of a movie magazine at a variety store has the probability…

A: no.of copies(X) probability (P(X)) x.P(X) X2.P(X) 0 0.06 0 0 1 0.14 0.14 0.14 2 0.16 0.32…

Q: A study of automobile accidents produced the following data: Proportion of all vehicles Probability…

A: Given that, An automobile from one of the model years 2014, 2013, and 2012 was involved in an…

Q: An educational psychologist is studying two methods of tutoring young children: Method A and Method…

A: There are two independent samples which are method A and method B. We have to construct 90%…