In a large population of college-educated adults, the mean IQ is 112 with standard deviation 25. Suppose 30 adults from this population are randomly selected for a market research campaign. The probability that the sample mean IQ is greater than 115 is:   a. 0.019.   b. 0.256.   c. 0.328.   d. 0.461.

Q: One sample has a mean of M=6, and a second has a mean of M=12. The  two  samples are  combined into…

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Q: If a sample consists of 700 test scores, of them would be at or above the 32th percentile.

A: Given that  Number of test scores in sample (n) = 700 Percentile = 32 = 0.32   We know that…

Q: A population of scores has a mean = 26, a median = 23, and a mode =22.  What is the most likely…

A: Given: Mean = 26 Median = 23 Mode = 22

Q: A racing car is one of the many toys manufactured by Mack Corporation. The assembly times for this…

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A: Given Information :  In 1955, Life Magazine reported that the 27 year-old mother of three worked, on…

Q: In a sample of n = 4, three subjects have scores that are 1 point below the mean each. The 4th…

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Q: In 2014, the per capita consumption of soft drinks in the United States was reported to be 42.1…

A: Hey, since there are multiple subparts posted, we will answer the first three subparts. If you want…

Q: . A cannery processes sardines.  Sardines have a mean length 4.54 inches with a standard deviation…

A: Solution: Let X be the length of sardines. From the given information, X has a mean µ=4.54 inches…

Q: Maddie teaches a class in which grades on an exam are normally distributed with a mean of u=100 and…

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Q: Suppose that we know that 33.8% of the people born in the United States between 1936 and 1951 have…

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Q: A quart of Parker's milk contains a mean of 39 grams of butterfat, with a standard deviation of 2…

A: Mean = 39 Standard deviation = 2

Q: In 1955, Life Magazine reported that the 25 year-old mother of three worked, on average, an 80hour…

A: Solution: Given information: n= 85 Sample size  x= 83.5 Sample mean μ= 80 Populaion Mean s= 10…

Q: The owners of a manufacturing company conducted a survey to determine the mean income of the…

A: We have to find correct answer.

Q: The average amount of snow per year in Whiteville is 32 inches. The standard deviation is 4 inches.…

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Q: For a population with σ = 5, what is the z-score corresponding to a score that is located 15 points…

A: Introduction: Suppose the raw score is x. Denote the mean as μ, and the standard deviation as σ for…

Q: A population of scores has a mean of ? = 35 and ? = 3.5. Find the z-scores that correspond to the…

A: Solution- Given that mean mu=35 and standard deviation s=3.5 Find Z score for corresponding X values…

Q: The mean score for freshmen on an aptitude test at a certain college is 540, with a standard…

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Q: Please explain how to solve the following:   The Aluminum Association reports that the average…

A: we are suppose to answer three sub parts .

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A: Given: weight at the beginning of the semester (X) End of term weight (Y) 45 52 61 65 62 64…

Q: The variance of this population data set 1.4,8.2,3.7,7.1 and 9.1 is : Select one: O A. 10.515 B.…

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Q: In company XYZ, the success of an email to land into a spam folder is 4%. If an account received 20…

A: Solution To find the probability we will use Excel  Given data is  n= 20

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Q: Step 4: Make a Conclusion About the null hypothesis. Since the p-value= 0.81030859860666 2 0.1897…

A: Given that, A pharmaceutical company claims their new diabetes medication results in less variance…

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Q: A sample has a mean of M = 50. If one new person is added to this sample, what effect will this have…

A: The sample mean is defined as M = Σx/n, where the value of observation is x and n is the total…

Q: If 10 men in a company have an average annual salary of GH¢360,000 and 23 women have an average…

A: The mean is the sum of a collection of numbers divided by the count of numbers in the collection. 10…

Q: If -7 is added to every observation in a set of data, what will happen to the variance? A. It will…

A: Variance is a statistical measure which tells the variability in that data. The variance has the…

Q: Cody took his first physics exam and scored an 80. The population mean for this exam is 70, and the…

A: The population mean for the exam is 70 and standard deviation is 5 μ=70σ=5 Cody's exam score is 80

Q: The city of Oakville has 60000 households. A social researcher from the University of Toronto…

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Q: According to Reader's Digest,  44% of primary care doctors think their patients receive unnecessary…

A: Given Information: 44% of primary care doctors think their patients receive unnecessary medical…

Q: Solve the problem. Assume that male Siberian huskies' weights are normally distributed with a mean…

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Q: If two large random samples are drawn from two populations, each having a mean of $100, the relevant…

A: The mean difference or difference in means, measures the absolute difference between the mean value…