For two groups of observations the following results were available: Group I E(X-5) = 8 E(X- 5)? = 40 N, = 20 Group II E(X-8) =- 10 E(X- 8)=70 N, = 25 Find the mean and the standard deviation of the 45 observations obtained by combining the two groups.

Q: 1) в 2) sP3 3) 8P2 4) 8Ра 5) ЗР2 8 P1

A:

Q: Compute the coefficient of determination

A: The table shows X and Y values.

Q: Calculate Fisher's Ideal Index from the following data and prove that it satisfies both the time rev...

A:

Q: Find the area under the standard normal distribution curve to the right of z=2.25. Use O The Standar...

A: From the provided information, The z value to the right is 2.25. That is P (Z > 2.25)

Q: The mean and standard deviation of 200 items are found to be 60 and 20 respectively. If at the time ...

A:

Q: (a) In a survey conducted by a mail order company a random sample of 200 customers yielded 172 who i...

A: a)Givenn=200x=172p^=xn=172200=0.86Confidence interval= 95%

Q: Suppose that 35% of voters in Martin county support a Ballot me the sampling distribution of the sam...

A: Given data,p=35%=0.35n=73Determine the mean and standard deviation of sampling distribution p?

Q: Nationally 60.2% of federal prisoners are serving time for drug offenses. A warden feels that in his...

A: Given,n=400x=260sample proportion (p^)=xnp^=260400=0.65α=0.05

Q: Data were collected to explain the number of wins a Major League Baseball team has based on the earn...

A: Hi there! Thanks for posting the question, since there are multiple subparts, we will solve the firs...

Q: quiz Attempt due: Ma (2) days past the deadline. The correct answers for the quiz will become availa...

A:

Q: Presidents and first ladies: The following table presents the ages of 9 U.S. presidents and their wi...

A: We have given that,  Her agr (X) :-  45, 54, 45, 55, 59, 49, 56, 56, 31 His age (Y) :-  47, 54, 46, ...

Q: Consider the following ARMA model for {y,}: ',=a,+ 2 j=1 +E + 1-j where {e } is the residual. Which ...

A: Given the ARMA model for yt : yt=a0+∑j=1pajyt-j+εt+∑l=1qblyt-l  where εt is the residual.

Q: The first four moments about the mean, are 0, 8, -144 and 14817 calculate the skewness based on mome...

A:

Q: 8; (A) 18, (aß) = 5 and N = 35. %3D 16. For two attributes A and B, we have (AB) Calculate the coeff...

A: Contingency table for the given information,   A α   B 8 17-5= 12 35-5= 20 β 18-8= 10 5 10+5=...

Q: If a continuous RVX (> 0) possesses memoryless property, that is P(X>x+h)= P(X > x). P(X > h), then ...

A:

Q: Factorial Simplify the following. 1. 7! 2. 4 + 4 3. 5! - 4! 4. (4!) (5!) Show your solution.

A: Given1)7!

Q: Suppose that points are distributed over the half-line [0;1) according to a Poisson process of rate ...

A:

Q: SITUATION 1 The following scores represent the final examination grades for an elementary statistics...

A: Given data is23,60,79,32,17,64,52,70,82,3680,77,81,95,41,65,92,85,55,7652,10,64,75,78,25,80,98,81,67...

Q: The average baptismal cost includes 50 quests. A random sample of 32 baptismal during the past year ...

A: Given,sample size(n)=32sample mean(x¯)=53standard deviation(s)=10α=0.05

Q: 2. Show that the AR(3) process Y, = B, + B,Y,-1 + B,Y,-2 + B3Y-3 +ɛ, can be written as AY, = B, + pY...

A: Given the AR(3) process Yt=β0+β1Yt-1+β2Yt-2+β3Yt-3+εt

Q: The following data, based or 450 students, are given for marks in Statistics and Eco- nomics at a ce...

A:

Q: State the dependent and independent variables in the following researches or studies. Research Depe...

A: In the given study or experiments, the dependent and independent variables are to be identified.    

Q: (a) P(Z 20.8) (b) P(Z< - 2.2) (c) P(- 0.9<Z<0.9)

A: Here AS  per policy I have calculated first 3 subparts kindly REPOST for remaining parts Here use st...

Q: 3. Suppose that the result of the third quarter Exam of MSU-SHS is normally distributed has mean of ...

A:

Q: The following data are given to you to find out whether the distribution is platykurtic N= 100, Efd,...

A: Concentration of all the values around the central value of the given data is known as measures of c...

Q: Two darts players throw altemately at a board and the first to score a bull wins. On cach of their t...

A:

Q: 3.80 A box contains two white, two red, and two blue poker chips. Two chips are randomly chosen with...

A: Given Information: There are 2 white, 2 red and 2 blue poker chips. Two chips are randomly selected ...

Q: Given that Ep,q, = 250, Ep.4, = 150, Paasche's index number = 150 and Dorbish Bowley's index number ...

A: Given that,     ∑p1q1=250     ∑p0q0=150 Paasche's Index Number=150 Dorbish-Bowley's Index Number=145...

Q: A manufacturer knows that their items have a normally distributed lifespan, with a mea years, and a ...

A:

Q: Q2. Consider an experiment to compare six oil refineries. Three refineries are in Texas and three ar...

A:

Q: According to a recent study, more than 900 people move to Florida each day! In fact, data show that ...

A: The random variable people who born in Florida follows binomial distribution. The sample size is 392...

Q: If the roots of the quadratic equation x – ax + b = 0 are real and b is positive but otherwise unkno...

A:

Q: Find the probability that two random samples, each consisting of 200 voters, indicated a greater tha...

A: The election return showed that a certain candidate received 65% of the votes.  n1 = 200 n2  =200 he...

Q: A recent study focused on the number of times men and women send a Twitter message in a day. The inf...

A: The parametric test are used when the population follows some distribution. The non parametric test ...

Q: basketball manager, you decide that your profit will be maximized with a win percentage of just .451...

A: @solution:::   Focuses For" is the quantity of focuses the group has scored. "Focuses Against" is th...

Q: 6. Danielle flips her coin three times. She's hopping for HHH or TTT. What are the complementary out...

A:

Q: Determine the z-score given the following P(z<a)%3D0.8 P15

A: z be a standard normal random variable.z~N(0,1)

Q: 5. In a sample of 500 children, 200 came from higher income group, and the rest from iower income gr...

A: Solution:

Q: The Bee Creek bridge will collapse if there is 35,000 pounds of weight on it. A random llama's weigh...

A: Probability distribution : A probability distribution table associates each outcome of a statistical...

Q: 2. The following table shows the probability distribution of the number of watches that a jeweller w...

A: Given probability distribution: Number of watches Probability P(X) 0 0.05 1 0.20 2 0.30 3...

Q: Muscle Tech has come up with a new plant-based protein powder and they claim that after taking this ...

A: Given:   Before  After 93 99 98 92 105 105 108 100 103 101 91 100 101 94

Q: SITUATION 7 Test the hypothesis that the average content of containers of a particular lubricant is ...

A: Given data set is10.2,9.7,10.1,10.3,10.1,9.8,9.9,10.4,10.5,9.8sample size(n)=10

Q: (d) Which of the following is the best interpretation of the correlation coefficient? OIf a quarterb...

A: Coefficient correlation : The correlation may be a applied math live of the strength of the associat...

Q: 9. Using Paasche's formula, compute the quantity index for the year 1983 with 1975 Fsbase. Comtuodit...

A: The Paasche's quantity index for the current year (i.e., 1983) with respect to the assumed base year...

Q: bie XIDUa to dětérminė to 5 décimal places the following proba (a) P(Z 1.45) = (d) P(7

A: as per policy I have calculated first 3 subparts kindly REPOST for remaining  Here use standard norm...

Q: (Boole's inequality) : If A1 ,A2 ...... An are n events, then (i) P A, > E P (A¡) -(n-1) i=1

A:

Q: Find the margeinul denity go In Problim e. assume the obured valee ofXi x = 3 value 5(1/X3) Find the

A:

Q: _4. In a normal distribution, the mean divides the area in half--- 0.5000 on each side. 5. The width...

A: 4 TRUE The normal distribution is symmetric distribution. The area under the normal curve is 1.0, Th...

Q: 1) Сз 2) 6Св 8C5 7C3 4) 6С5 5) C2

A: we know that Cr=n!r!×n-r!n

Q: The first four moments about the mean, are 0, 8, -144 and 14817 calculate the skewness based on mome...

A: Given information μ1=0 μ2=8 μ3=-144 μ4=14817