What is the approximate standard deviation of the final exam scores?

Q: Find the indicated IQ score. The graph to the right depicts IQ scores of adults, and those scores…

A: Given,   Mean = 100 Standard deviation = 15

Q: Find the indicated IQ score. The graph to the right depicts IQ scores of adults, and those scores…

A: Obtain the indicated value of the IQ score. The indicated value of the IQ score is obtained below as…

Q: Find the indicated IQ score. The graph to the right depicts IQ scores of adults, and those scores…

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Q: The percentage of area under the normal curve between the mean and 0.2 standard deviations from the…

A: Introduction: For a random variable, X with mean μ, and standard deviation σ, the z-score is given…

Q: Find the indicated IQ score. The graph to the right depicts IQ scores of adults, and those scores…

A: Let X be IQ score  from normal distribution with mean (μ) = 100 and standard deviation (σ) = 15

Q: Find the proportion of Normally distributed observations with a zz-score above 0.84. Give your…

A: Let Z be the random variable from normal distribution with z-score above 0.84 then we will find the…

Q: You are estimating the mean size of farms in New Hampshire.  You want your 95% CI to have a margin…

A: The formula for the sample size is as follows:

Q: A medical lab tested a sample of 8 vials of blood for acidity on the pH scale.  Use this data to…

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Q: The director of research and development is testing a new medicine. She wants to know if there is…

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Q: The median score on a test was 80% with a standard deviation of 5%, what does that tell you about…

A: Central tendency is used to determine the average of the data set. Dispersion is used to determine…

Q: The velocity of an object can be modeled by an approximately normal distribution with a mean of 70…

A: Let X be the random variable from normal distribution with mean (μ) = 70 and standard deviation (σ)…

Q: a. What is the difference between carrier's highest data speed and the mean of all 50 data speeds?…

A: Here Given  Highest Speed measured=76.6 Mbps Sample Size=50 Sample mean=x¯=18.68 Sample sd= s= 37.17…

Q: A distribution of values is normal with a mean of 235 and a standard deviation of 14.4. Find P63,…

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Q: A group of students take a Statistics Exam where the average was M = 90 and the standard deviation…

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Q: The diameters of red delicious apples of an orchard have a normal distribution with a mean of 3…

A: Let x be the continuous random variable and it said to follows normal distribution with mean μ and…

Q: Find the percent of area under a normal curve between the mean and -1.18 standard deviations from…

A: Here Given  For normal curve

Q: the average grade is 84 with a standard deviation of 4. What is each grade for -1 2 0 1.5 -1.25

A: Given Mean μ=84Standard deviation σ=4 The formula for Z score isZ=X-μσX=Z×σ+μ

Q: The weight of newborn babies is normally distributed, with a mean of 3.7 kilograms and a standard…

A: GivenThe weight of new born babies are normally distributed.The mean =3.7 KgThe standard deviation…

Q: normally distributed data, what percentage of scores would fall between the z-scores -.52 and +1.4?…

A: We want to find the percentage of scores would fall between the z-scores -0.52 and +1.4?

Q: The distribution of scores is approximately normal with a mean of 31 and a standard deviation of 5.…

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Q: A group of students take a Statistics Exam where the average was M = 90 and the standard deviation…

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Q: The population mean of happiness is 5.382, with a standard deviation of 1.138. Linda has a z score…

A: We have given that,  Let X be a random variable following normal distribution with mean (Mu) = 5.382…

Q: You just administered an opportunity for your students to demonstrate their understanding of…

A: The mean measures the central tendency of the data and the standard deviation shows us how much…

Q: A group of students take a exam and the adverage was m = 90 and the standard deviation was 7.8.…

A: Standard normal distribution: The standard normal distribution is a special case of normal…

Q: in how you determined your findings. How many children scored lower than Emily? How many children…

A: The standard normal variate of the normal distribution is continuous and follows that z~N(0,1). The…

Q: The percentage of area under the normal curve between the mean and -0.1 standard deviations from the…

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Q: Find the indicated IQ score. The graph to the right depicts IQ scores of adults, and those scores…

A: From the given information, μ=100σ=15 From the given plot, PX>x=0.1026