a.   The average age of 12 jurors on a jury is 50 years.     b.   The standard deviation of battery life for all iPhone 6 is 2.1 hours after fully charged.     c.   To study the fish in Michigan lakes, the DNR calculated the average weight of 164 adult bluegills, caught by anglers, to be 2.6 lbs.

Q: Suppose that the lifetimes of light bulbs are approximately normally​ distributed, with a mean of…

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Q: Suppose that the mean cranial capacity for men is 1040 cc (cubic centimeters) and that the standard…

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A: The given values are shown Table 1. The formula to find mean for any sample is, x¯=∑(xf)n (1) Here,…

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A: Question 8: Class A: The value of mean for class A is, Mean=∑ixiN=4+6+2+1+1+16=156=2.5 Thus, the…

Q: How many standard deviations to either side of the mean must we go to ensure that, for any data set,…

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Q: The trunk diameter, in centimeters,  of a certain variety of pine tree is represented by X~N(150,…

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A: Given data, Mean = 69 SD = 7

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Q: A manager is interested in finding the average number of sales per day at a sporting goods store. If…

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Q: A random sample of 8 adults aged 30 years were asked how much they spent on medical costs in the…

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Q: For a population with a standard deviation of σ = 20, how large is a sample  necessary to have a…

A: The standard deviation is 20.

Q: A) Determine the average owner occupancy rate (percentage) for the three cities: From the following…

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Q: Calculate the standard deviation of the following four observations: 12,13,15,20

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Q: If a product has a mean demand of 80 with a standard deviation of 10, if the customer holds 100…

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Q: Given a population where p = 0.10, find the standard deviation of the samping distribution when the…

A: It is given that p is 0.10.

Q: In this dry lab, calculate the average and standard deviation of the following data. Table1 Trial 4…

A: There are total n = 9 trials

Q: The mayoral office surveyed the number of people who use each of the city's public shelters every…

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Q: If the average low temperature of a winter month in Rochester, NY is 16° and the standard deviation…

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Q: In an exam for a statistics class, the class average is 68 with a standard deviation 4. If a student…

A: Given mean μ= 68, standard deviation σ= 4 Let X: score of the students = 75

Q: In a small company of 10 people the salaries are as follows: 5 people earn $25,000, 3 earn $27,000,…

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Q: Find the range and standard deviation for the data items in the histogram below. 5 4 Frequency

A: From the histogram, The frequency table is, Data Frequency 10-20 2 20-30 5 30-40 5 40-50…

Q: The final exam scores in a statistics class were normally distributed with a mean of 63 and a…

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Q: The weights, in pounds, of a group of dogs are:          18, 31, 22, 46, 55, 28.    Calculate the…

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Q: If the average American sleeps 8 hours a night, with a standard deviation of 1 hour, and I plan on…

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Q: In a large section of a statistics​ class, the points for the final exam are normally​ distributed,…

A: Given that the mean value is 76 and the standard deviation is 7. Grades are assigned such that the…

Q: Nabisco claims that Chip Ahoy Cookies have an x=28.67 per cookie with a SD=2.67. Assuming this…

A: Here, the sample standard deviation is given as 2.67.

Q: Which of the following would be the standard deviation used in developing the p-control chart?

A: Given:  Proportion of defective product p= 0.03 Sample size n=30  To find standard deviations used…

Q: In a statistics class of 150 students, the mean and standard deviation of scores was 70 and 5,…

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Q: The following are total cholesterol scores measured in 10 patients who are participating in a study…

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Q: Consider the company, which produces lightbulbs with a mean lifetime of 1,200 hours and a standard…

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Q: The mean June midday temperature in Desertville is 36°C and the standard deviation is 3°C. Assuming…

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Q: Find the standard deviation for the given data. Round to one more decimal place than the original…

A: We have given that,  Rhe data set are: X:- 3, 5, 6, 6, 9, 1 Then,  We will find the standard…

Q: A marketing study of 800 adults in the 18-34 age group reported the following information. Spent…

A: Calculate Mean, Sample Standard deviation (S) from the following grouped data Class Frequency 0…

Q: calculate the standard deviation of the following four observations: 13,14,16,18

A:

Q: If the average low temperature of a winter month in Rochester, NY is 18∘18∘ and the standard…

A: According to the Chebyshev's theorem, 1-(1/k²) of the observation fall within k standard deviation…

Q: Use the following excerpt to answer the questions below. In the state of California, there is an…

A: a) Here the hypothesis are given by H0: μ=7500 vs H1:μ>7500 b) Here the random variable follows a…

Q: A series of sodium chloride samples are analyzed and the following results were recorded: Sample…

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Q: A person in the U.S. eats about 25 pounds of M&M's per year with a standard deviation of 3 pounds.…

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Q: Find the standard deviation of the following set of data: (1,3,5,7,9}

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Q: The manufacturer of an extended-life lightbulb claims the bulb has an average life of 13,000 hours…

A: Hello! As you have posted more than 3 sub parts, we are answering the first 3 sub-parts.  In case…

Q: stimate for the average weekly income of all the computer programmers in Houston? 2. What is the…

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Q: In a large section of a statistics​ class, the points for the final exam are normally​ distributed,…

A: Given, Mean = 71 SD = 8