Mary scored a 25 when the mean is 23 with a SD of 1.5 Sarah scored a 7 when the mean is 6 with a SD of .8. We know that Mary did better. True or False

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A: GivenMean(x)=91sample size(n)=20standard deviation(s)=5.7confidence level=90%

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A: It is given that sample size (n) is 2414 and x is 1116.

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A: Given,mean(μ)=74500

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A: From the provided information, Mean (µ) = 8040 Standard deviation (σ) = 4600 X~N (8040, 4600) Sample…

Q: Find the t –value for n = 20 and  alfa = 0.5 % in one tail.

A: The degrees of freedom is, df=n-1    =20-1    =19

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A: Mean is the sum of observations divided by the total number of observations.

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A: From the above example The assumptions of correlation coefficient r is the  The correlation…

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A: Given: Standard deviation σ = 1.15 Formula used: Empirical rule: 68% of data falls within 1 standard…

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A: It is given that the data in percent is: -6.2, -8.2, -3.8, 1.8, 5.4

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A: As per our guidelines I can solve only first three subparts. Kindly post the remaining subparts…

Q: Prove if yo~ N(4,0) for M being any real number Hrup &o is greater than Zero, then Z= = (x-μ)…

A:

Q: Business Weekly conducted a survey of graduates from 30 top MBA programs. On the basis of the…

A: given data μ=183000σ=34000n=65here sample size n≥30as per CLT we can say that distribution is…

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A: given data,n=35x¯=12.15 ozσ=0.1 ozclaim that the population mean is μ=12 ozwe have to find out the…

Q: how did you get the standard deviation of 4.8567 on the solution above?

A: Solution: Given information:  n= 4 subgroup sample size  R = 10

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A: Given,            LSL=40 ppm           USL=55 ppm                μ^=44 ppm               σ^=3 ppm

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A: Arrange the data set in ascending order.…

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A: From the problem and the solution, we have n = 8 α = 0.10 t = -0.681

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A: From the provided information, Sample size (n) = 7 The data values are as follow: 286, 269, 259,…

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A: GIVEN DATA, n=20x¯ =210population standard deviation is known σ=32CI=0.99α=1-0.99=0.01Zc=?we have to…

Q: Webster Chemical Company produces mastics and caulking for the construction industry. The product is…

A:

Q: estimate the mean pulse rate of adult males. Assume that we want 95% confidence mean. Complete parts…

A: Given E=2bpm Confidence level=95%

Q: Suppose an influenza vaccine trial carried out during an epidemic. Of 460 adults who took part, 240…

A: Given that, An influenza vaccine trial carried out during an epidemic. Of 460 adults who took part,…

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A: Note: Hi, thank you for the question. As per our company guideline we are supposed to answer only…

Q: simple of size n equals 32 has a simple mean x bar equals 53 in simple standard deviation as equals…

A: n=32, sample mean x̄=53, standard deviations s=5.5 Level of significance ɑ=0.10

Q: Find the standardized test statistic, z, to test the claim that p1< p2. Use α = 0.10. The sample…

A:

Q: Exercise 6.20 (p. 321). Recall that the facial width-to-height ratio (WHR) for each in a sample of…

A: Given that, sample mean is x̄ = 1.96  sample standard deviation, s= 0.15  sample size is n= 55 Here…

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A: We have to explain about symbol !

Q: 1) Assume the following joint probability distribution: P(x,y) X 1 3 5 сл 2 0.1 0 0.1 y 5 0.3 0.1…

A: X and Y are independent if E(XY)= E(X)*E(Y)  We find these values and check the condition.   And…

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Q: What is the obtained value of the appropriate statistical test? A) 0.812 B) 3.263 C) 3.350 D) 3.840…

A: The marginal frequencies are computed as follows:   Accepted chocolate Refused chocolate Total…

Q: A survey is conducted every year among university students across a certain country on the question…

A: Given that, A survey is conducted every year among university students across a certain countryon…

Q: Explanation of Solution It is given in the question that Arsenic blood concentrations in healthy…

A: Given that  Population mean μ =3.2 Population standard deviation =1.5

Q: -9 The range is $ 250. dollars² (Round to the nearest whole number as needed.) ا... 46 | 21 = LTE2 {…

A: Data given 422,465,404,215

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Q: You decide to quit using your credit card and want to pay off the balance of $13,300 in 2 years.…

A: PV = $13300 r = 21.35% = 0.2135  n = 2 years = 2*12 = 24 months Formula :  P = r*PV/(1-(1+r)-n)

Q: An experimenter flips a coin 100 times and gets 42 heads. Test the claim that the coin is fair…

A: From the provided information, An experimenter flips a coin 100 times and gets 42 heads. Sample size…

Q: Scenario: If 20 participants completed an attention task twice — once after consuming a sugar pill…

A: Given Sample size n=20

Q: equency The frequency distribution was obtained using a class width of 0.5 data on cigarette tax…

A: The population mean is $1.820

Q: Consider a random variable Y with density function given by f(y) = ke-y²/2 a Find k. b Find the…

A:

Q: What is the value for the estimated standard error for a set of n = 11 difference scores with SS =…

A: n=11, SS=990

Q: Match the following hypothesis statements with their the null hypothesis, H0, and the alternative…

A: Here we have to find the null and alternative hypothesis for the given choices