An exam score has a mean of 78 and a standard deviation of 9. What is the Z-score for an exam score of 64.5? What is the z-score for an exam score of 82.5? Which exam score is more unsual, 64.5 or 82.5? An exam score of 64.5 is more unsual because its corresponding z-score is further from 0. O An exam score of 82.5 is more unusual because its corresponding z-score is further from 0.

Q: A dpt store has a daily mean sales of $28,372.72. The standard deviation of sales is $2000. On…

A: Given: Daily μ=28372.72σ=2000 On Tuesday x=34885.21

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A:

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A: Level of significant = 10%  Here we use the two sample mean t test to solve this problem.

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A: The mean is 24 bananas a day with a standard deviation of 3 bananas. One monkey eats only 17…

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A:

Q: Do men take less time than women to get out of bed in the morning? The 42 men observed averaged 7.6…

A: Given , n1=42 , n2 =52  x¯1=7.6 , x¯2 =9 s1=2.2 , s2 =2.1 The hypothesis will be stated as below  H0…

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Q: The 2018 Math Portion of the SAT score are normally distributed with a mean of 527 and a standard…

A: Empirical Rule: If a population has bell shaped distribution with mean µ and standard deviation σ ;…

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A: The known values are, Use the Range Rule of Thumb, the minimum usual heights of three-year-old…

Q: 1. On a final examination in Mathematics, the mean was 76 and the standard deviation was 5.…

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

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A: The given researcher claims is that the stomachs of blue crabs from Location A contains more fish…

Q: 1.A particular leg bone for dinosaur fossils has a mean length of 5 feet with a standard deviation…

A: Note: Please repost 2nd question as i can answer only 1 question as per my policy. 1) Given…

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A: Given: n= 101.0 ,x̄= 31000.0 ,s= 5000.0 µ= 35000.0 ,significance level(∝)= 0.02Now here using…

Q: Which is better a score of 91 on a test with a mean of 81 and a standard deviation of 15, or a score…

A:

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A: Given: n=80x¯=20μ0=26σ=10α=0.05

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A: Given information

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A: GivenMean(μ)=810standard deviation(σ)=280

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A:

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A: Here we need to find the cutoff for A grade. Given that the top 10% are given A. We assume that the…

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A: Formula for z score : z = x-μσ

Q: Assume the salaries of elementary school teachers in the US are normally distributed with a mean of…

A: We bave to find given probability.

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A:

Q: A study at the University of Colorado at Boulder shows that running increases the percent resting…

A: Null Hypothesis: A hypothesis which is tested for plausible rejection is called the Null Hypothesis…

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A: Given information Mean (µ) = 24 Standard Deviation(σ) = 2 X = 27

Q: For a recent "Smartest State in America" article, a journalist wants to know how many people with a…

A: The mean is 5,000,000 and the standard deviation is 450,000.

Q: The monthly income of residents of Daisy City is normally distributed with a mean of $3000 and a…

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

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A: Given two problems related to hypothesis testing. We have to solve the problems as indicated.

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A: The Z-score of a random variable X is defined as follows: Z = (X – µ)/σ. Here, µ and σ are the mean…

Q: Suppose a locally owned coffee shop had an average daily revenue of $4,191 before some ordinance was…

A: Given Data: x¯=3922s=750n=30   Null and Alternate Hypothesis: H0: μ=4191 H1: μ≠4191

Q: What is the z-score of a value of 27, given a set mean of 24, and a standard deviation of 2?

A:

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A: Z-SCORE =(X-mean) /standard deviation

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A: We have to find z score..

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A: Balitmore mean = 286455 sd = 11200 DenverMean = 188468sd = 8230

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Q: A test involving 340 men ages 20 to 24 found that their blood cholesterol levels had a mean of 188…

A:

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A: From the provided information, Sample size (n) = 36 Sample mean (x̅) = 30.1 g Sample standard…

Q: A Physics test has a mean of 150 and a standard deviation of 12.  A Geography test has a mean of 46…

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A:

Q: A graduate student is performing a study on a new antidepressant. The drug is supposed to reduce…

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A: The z-score is a score expressed in terms of hypothetical standard normal distribution with mean 0…

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A: GivenAlfred scored 82 in a quiz in english with Mean(μ)=75standard deviation(σ)=10score 70 in a quiz…

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A: Introduction: Denote μ1, μ2 as the true population mean weights of fish in the stomachs of blue…

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A:

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Q: Which is better and corresponds to the higher relative position, a score of 92 on a test with a mean…

A: Solution:From the given information, score of 92 on a test with standard deviation of 15 and mean of…