Raul received a score of 77 on a history test for which the class mean was 70 with a standard deviation of 4. He received a score of 79 on a biology test for which the class mean was 70 with standard deviation 8. On which test did he do better relative to the rest of the class?

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A: The formula of Z-score is,

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Q: Raul received a score of 73 on a history test for which the class mean was 70 with a standard…

A: Here we need to find the z score and for that, we have to use the formula z = Value-meanStandard…

Q: On a final  examination in mathematics , the mean was 72  and standard deviation was 15 . Determine…

A: given information: μ=72σ=15x=65 we want to determine the z score . z=x-μσ  =65-7215  =-0.4667

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A:

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Q: The mean grade on a science test was 79 and there was a standard deviation of 6. If your sister…

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A: Solution: It is given that a computer programmer in Portugal who makes $809.40 has a z-score of…

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A: Given For males, μ=4.296σ=0.907 For females μ=3.764σ=0.866

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A:

Q: The mean of a test score was 21.2 and the standard deviation was 5.1 . Identify the rest scores that…

A: Given Data Mean µ= 21.2. Standard Deviation σ= 5.1. Assuming that the given data is obtained from a…

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A: We will find the actual score as following.

Q: z-scores. Comparing z-scores, which test did she do better on

A:

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A: The scores of a university are normally distributed with mean 70 and s standard deviation 10.Given…

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A: Given data,Mean μ=72sd      σ=7If John scored 75z-score=?

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A: Given that.   X~N( μ , ?^2 )   Z-score =( x - μ )/?

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A: Given information, Mean =516 Standard deviation =116

Q: Raul received a score of 76 on a history test for which the class mean was 70 with a standard…

A:

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A: If the z-score lies within 2 standard deviation away from the mean, then the score is not unusual…

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A:

Q: The results of a common standardized test used in psychology research is designed so that the…

A: From the provided information, Mean (µ) = 175 Standard deviation (σ) = 10 X~N (175, 10) Here X be a…

Q: Raul received a score of 77 on a history test for which the class mean was 70 with a standard…

A: Define History as H and biology as B. Given: H=77μH=70σH=9B=75μB=70σB=4

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A: Let X= score of a student  Given that X follows a normal distribution with mean=72 and standard…

Q: What is the z-score if our standard deviation was 2, mean of 49 and our specific observation is 47?

A: Given: Standard deviation = 2 Mean= 49 Specific observation =47 Determine the Z- score using the…

Q: The mean grade of Adrian in the final examination in mathematics was 85 and the standard deviation…

A: 1) Given that: Mean for mathematics = 85 Standard Deviation for mathematics = 7 Mean for science =…

Q: Last week, Sarah had exams in math and in Spanish. On the math exam, the mean was 30 with a standard…

A: A) Given data,For Math exam,μ=30σ=5x=45For Spanish exam,μ=60σ=8x=68

Q: The mean score on the Stats exam was 75 points with a standard deviation of 5 points, and Gregor’s…

A: The mean score on the Stats exam was 75 points with a standard deviation of 5 points, and Gregor’s…

Q: Loretta, who turns 91 this year, has heard that the mean systolic blood pressure among the elderly…

A: (a) The null and alternative hypothesis is; Ho: μ=120H1: μ>120 (b) Here we will be using…

Q: 2. On a standardized test, Sara had a score of 81, which was exactly 2 standard deviations below the…

A: Given : Test score = X = 81 Standard deviation = σ = 3

Q: The mean height of male college students in a large city is 68 inches and the standard deviation is…

A: Answer:----.                       Date:----10/10/2021

Q: The mean grade of Adrian in the final examination in mathematics was 85 and the standard deviation…

A: For mathematics :mean(μ)=85standard deviation(σ)=7For sciencemean(μ)=89standard deviation(σ)=13

Q: On which test did he do better relative to the rest of the class?

A: For history test, mean= 70, SD=7 and Rahul's score is X=79 For biology test, mean=70, SD=9 and…