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…

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Q: Men's heights have a mean of 165 cm and a standard deviation of 6 cm. The z-score corresponding to…

A: The following information has been provided: μ=165σ=6Z=0.27 We need to compute the raw score X.

Q: Find the area of the shaded region. The graph to the right depicts IQ scores of adults, and those…

A: given data, normal distribution , μ=100σ=15we have to find out the shaded region for the given…

Q: Suppose you select a sample of 2,000 high school seniors' verbal SAT scores. The mean and standard…

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Q: Use the following data to answer the first two questions. The test scores for a sample of five…

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

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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: At McMeck High School they decided to calculate the average GPA of all 950 students.  The average…

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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: In a sample of people, the mean height was  65.2  inches and the heights range from  56  to  70…

A: It is assumed that  denote the height of the person.The random variable X is given as normally…

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

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Q: s the prior probability of something the same as the current probabilit my is everything else is…

A: question:   Is the prior probability of something the same as the current probability my is…

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: on a national achievement test score was 850 with a standard deviation of 100. what proportion of…

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: 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: The manager of a department store wants to estimate the average amount of money a customer will…

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Q: The standard deviation on your last test was 10. The average was a 70. The distribution had a normal…

A: To find out what percentage of the class scored between 60 and 80, we need to utilize the properties…

Q: The scores on a test are normally distributed with a mean of 90 and a standard deviation of 18. What…

A: Let X be the score in the test. X is normally distributed with mean=90 and standard deviation =18…

Q: This is used for the next few questions: The rating for the new scary movie has a scale of 0 to 10.…

A: The normal distribution curve corresponding to mean 8.3 and standard deviation 0.5 including the…

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: 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

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

A: IQ scores are normally distributed, Mean = 100 Standard deviation = 15

Q: The mean grade in the Physics examination was 73 and the standard deviation was 8. Determine the…

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Q: Suppose the exam average in a class is 55% with a standard deviation of 4. What proportion of…

A: The random variable score follows normal distribution. The population mean is 55.         The…