Ho is μ equals 15 and H1 is μ is greater than 15, Sample mean is 12, Sample Standard Deviation is 3, Sample size being 25, calculated value of t is a. -5 b. 10 c. 5 d. -10

Q: Observe the values of the means and standard deviations in the four samples you gathered and list as…

A: Simple random sampling is the technique of selecting the in such a way that way each sample has an…

Q: The mean of a normal disiribution is 50 and standard deviation is 12.5. Calculate the 60th, 65th and…

A: Given,mean(μ)=50standard deviation(σ)=12.5

Q: Imagine that you and four of your classmates have measured the density of air and recorded the…

A: Let X be an density of air kg/m3. Therefore, X=1.27,1.21,1.28,1.25,1.24 We have to find average,…

Q: The director of research and development testing and new drugs she wants to know if there's evidence…

A: Test statistic:Denote μ as the claimed mean; μ = 384. In a random sample of n = 79, the sample mean…

Q: Suppose a variable is normally distributed. What percentage of scores fall between one standard…

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Q: Scores on a test have a mean of 6 and a standard deviation of 9. Michelle has a score of 57. Convert…

A:

Q: 20. For the data in the following sample: 10, 6, 8, 6, a. Find the mean and the standard deviation.…

A: 20. a. The mean of the sample is, x¯=∑ixin=10+6+8+6+55=355=7 Thus, the mean of the sample is 7. The…

Q: The mean deviation of the data(1 * :2,9,9,3,6,9,4 from the mean is 2.23 3.23 O 2.57 O 3.57 O

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Q: In an  administration to 2000 student the average score is 65 and the standard deviation is 25.…

A: Given in an administration to 2000 student the average score is 65 and the standard deviation is 25.…

Q: The deviation of an entry x in a population data set is the difference between the entry and the…

A: Note: Hi there! Thank you for posting the question. It is considered that the deviation is taken…

Q: ind the range, the standard deviation, and the variance for the given samples. Round noninteger…

A: The given sample observations are:74, 70, 79, 81, 89, 72, 66, 78, 77, 73, 95 The objective is to…

Q: Mrs. Santos administered a Science Achievement Test to a random 45 graduating SHS students. In this…

A: Since you have asked multiple questions, we will solve the first question for you. If you want any…

Q: H=34, o=4.5, the score is 2.5 standard deviations above the mean

A: Suppose the variable of interest is x.The mean is and the standard deviation is .

Q: Give the mean and the standard deviation of the distribution of means for mean=100; Variance=100;…

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Q: Assume that adults have IQ scores that are normally distributed with a mean of 100 and a standard…

A: Given: Population mean (µ) = 100 Population standard deviation (σ) = 15

Q: Assume the test scores in your class are normally distributed with a mean of 84. You scored a 96,…

A: Given: mean = 84.

Q: Now, randomly select 4 samples of size n = 10 from the population. Record the samples below. As…

A: Given information: The data represents samples means of a randomly selected samples of size 10.

Q: If a distribution has a mean of 35 and a standard deviation of 5, what value would be +1.5 standard…

A: Given that The value of mean of 35, Standard distribution of 5 and that correspond s to a z-score of…

Q: In normally distributed data, what percent of the data lies on the interval 2 standard deviations…

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Q: If a student scored 77 points on a test where the mean score was 84.5 and the standard deviation was…

A: Solution: Let X be the score of a student. From the given information, X has a mean µ=84.5 and a…

Q: The mean is 146 and the standard deviation is 35. A score of 41 is how many z-scores below the mean?

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Q: The mean of a set of data is 4.68 and its standard deviation is 2.83. Find the z score for a value…

A: Reviewing information, Given, μ=mean=4.68σ=standard deviation=2.83x=9.38

Q: The first four deviations from the mean in a sample of n = 5 reaction times were .3, .9, 1.0, and…

A: It is given that, n=5 and  First four deviations from the mean for reaction time is 0.3,0.9,1.0,1.3…

Q: Assume the birth weights at a local hospital have a normal distribution with a mean of 110 oz and a…

A: Let , random variable x follows normal distribution with mean μ and standard deviation σ 1) The…

Q: Find the population variance and standard deviation for th 10, 60, 50, 30, 40, 20 → ata set:

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Q: How many of the sample of families would fall above 2 standard deviations from the mean? A. 0 B. 1…

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Q: Assume that a randomly selected subject is given a bone density test. Bone density test scores are…

A: Assume that a randomly selected subject is given a bone density test. Bone density test scores are…

Q: Exhibit 6-5 The weight of items produced by a machine is normally distributed with a mean of 8…

A:

Q: If the deviations six of values from their mean are 0 , -6, 7 , -2 , 5 , -4 then the variance equal…

A: Variance: Variance is used to explain how the data points (or values) are deviated from the mean and…

Q: Ms. Gonzalez has recorded the test scores for each of her 25 students. She has calculated EX? 320…

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Q: In order to use the defining formula for sample standard deviation, it is helpful to first calculate…

A: (X - X bar) at 6 => 6-6.2 = -0.2  (X- X bar) at 8 => 8-6.2 = 1.8

Q: For the following data in the sample:     0,    6,    8,    6,    5 Find the mean and the standard…

A: The data is given as 0, 6, 8, 6, 5.

Q: Q21. For the Given values of 91.9, 84, 88.5, 86.8, 89.4,83.6, 80.2, 88.1, 88.5, 93.1 and 93.8…

A: Hello there! Thank you for the question. According to our Honor code we are allowed to answer only…