20. One sample of n 12 scores has a mean of M-7 and a second sample of n =8 scores has a mean of M 12. If the two samples are combined, what is the mean for the combined sample?

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Q: A sample of n=16 is selected from a population = 100 and σ= 32. If the sample mean is 127, what is…

A: z-score for sample mean: From the given information,   n=16 µ=100 σ=32 x-bar=127   Therefore,

Q: One sample has a mean of M=6, and a second has a mean of M=12. The  two  samples are  combined into…

A:

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Q: 1. If we have 1000 scores, normally distributed with a mean of 92 and an SD of 7, how many would be…

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A: Given : n=64 , µ= 50 ,  σ = 12 , sample mean=M=52 Our aim is to find the given statement is TRUE of…

Q: What is the probability of randomly selecting a sample of n = 36 with a value greater than M = 63…

A: given: M=63 n=36 mean=60 standard deviation = 12

Q: Suppose a study reported that the average person watched 4.68hours of television per day. A random…

A: From the given information, Sample size n =15 the Sample mean, x̅=3.627 hours the Sample standard…

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Q: A sample of n=24 is selected from a population = 120 and σ = 40.  If the sample mean is 130, what is…

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A: Given: \mu = 8.4, \text{ } \sigma = 1.8, \text{ } n = 40μ=8.4, σ=1.8, n=40 The corresponding z-score…

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Q: A) one sample of n=10 scores has a mean of m=8, and a second sample of n=5 scores has a mean of…

A:

Q: Suppose a study reported that the average person watched 4.68hours of television per day. A random…

A: From the provided information, Sample size (n) = 15 Sample mean (x̅) = 3.627 Sample standard…

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Q: The scores of a random sample of 8 students on a physics test are as follows: 60, 62, 67, 69, 70,…

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Q: If a sample of size 36 is selected from a population and its standard error of mean is 2, what must…

A: Measure of central tendency measures the central or average value of a dataset. Measured of…

Q: One sample has a mean of M = 10 and a second sample has a mean of M = 20. The two samples are…

A: Given: mean of one sample M = 10, mean of second sample M = 20. For part 1: To find the mean for the…

Q: If a sample of n = 4 scores is obtained from a normal population with µ = 70 and σ = 12, what is the…

A:

Q: A researcher selects all of the possible samples with n = 8 scores from a population and computes…

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Q: The first four deviations from the mean in a sample of n = 5 reaction times were 0.1, 0.5, 1.1, and…

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Q: If all the possible random samples with n- 36 scores are selected from a normal population with u-…

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Q: Suppose a researcher is trying to understand whether people who purchase fast-food hamburgers would…

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Q: n a sample of n = 5, four subjects have scores that are 1 point above the mean each. The 5th…

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A: Given information: The given randomization dot-plot is based on 200 simulated samples.

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Q: A random sample of n = 9 scores is obtained from a population with µ = 50 and σ = 9. If the sample…

A: Given, Mean = 50 Standard deviation = 9   Sample size = 9 Sample Mean = 53   The objective is to…

Q: Suppose a sample size of 87 was used to conduct a right tailed hypothesis test for a single…

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Q: What proportion of the distribution of sample means is between a z  of 1.34 and z of -1.00?

A: P(1.34<z<-1.00)=?

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Q: 2. The professor of MAT 152 investigates 5 students associated between P1 and P2 tests. Is there a…

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A: Given that  Hypothesized Population Mean (\mu)(μ) = 66 Sample Standard Deviation (s)(s) =…

Q: 7. Suppose a researcher wants to estimate the difference in proportions of firstborn between the…

A: let us assume p^=0.5margin of error (E)=0.05α=1-0.90=0.1α2=0.05Z0.05=1.645

Q: 4. Suppose that only 10 students in Nabatieh campus had taken the midterm. Which of the following…

A: We know that, here  n= 10 (even) So median=(n/2 +(n/2+1)th term)/2 = (5th +6th term)/2

Q: If one sample with a mean of M = 10 is combined with a second sample with a mean of M = 20, then the…

A:

Q: 1. Report the number of hours you spent looking at a device last week and the date for each. (If the…

A: (a) Given data provides number of hours spent looking at a device is exactly same for each day of…

Q: If we are performing a two-tailed test of whether µ = 100, the probability of detecting a shift of…

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Q: A researcher wants to test the hypothesis that college students weigh less on average than the…

A: Note: Thank you for the question. Since the complete question is missing, we have checked whether…

Q: One sample has a mean of M=8 and a second samplehas a mean of M=16. The 2 samples are combined into…

A: Given data M1 = 8 M2 = 16 n1 = 3 n2 = 5