The results of a national survey showed that on average, adults sleep 6.9 hours per night.Suppose that the standard deviation is 1.2 hours.a. Use Chebyshev’s theorem to calculate the percentage of individuals who sleepbetween 4.5 and 9.3 hours.b. Use Chebyshev’s theorem to calculate the percentage of individuals who sleepbetween 3.9 and 9.9 hours.

Q: A health care prifessional wishes to estimate the birth weights of infants. How large a sample must…

A: Given Information :  A health care professional wishes to estimate the birth weights of infants. He…

Q: A livestock company reports that the mean weight of a group of young steers is 1106 pounds with a…

A: Given: μ=1106 and σ=79.…

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

A:

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

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A: We want to find the sample size

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A: The sample size is 83, mean is 39.04, and standard deviation is 11.51.

Q: Suppose that wedding costs in the Caribbean are normally distributed with a mean of $6500 and a…

A: Given: μ=6500σ=840 As per empirical rule, 68% of data lie within 1 standard deviation of the mean…

Q: The annual income of residents in a county is $42,000 with a standard deviation of $10,000.  Under…

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

A: Given μ= Mean =71 σ= standard deviation =8  Top​ 10% receive​ A's  Next​ 20% received​ B's Middle​…

Q: A livestock company reports that the mean weight of a group of young steers is 1157 pounds with a…

A:

Q: In a PH modeling agency, a researcher wishes to see if the average height of female models is really…

A: Given,sample size(n)=32sample mean(x¯)=66.3sample standard deviation(s)=1.9degrees of…

Q: A certain machine makes electrical resistors having a mean resistance of 50 ohms and a standard…

A: Let, X= resistance Given that X follows a normal distribution with mean=50 and standard deviation=4…

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: A researcher finds that the mean income (in dollars per week) of a sample of people who live in a…

A: Given:

Q: Suppose that the mean retail price per gallon of regular grade gasoline in the United States is…

A: Mean = 3.49 Standard deviation = 0.20

Q: The book Investments by Zvi Bodie, Alex Kane, and Alan Marcus claims that the returns for investment…

A: 1] Standard deviation for the first portfolio=0.55 2] Standard deviation for the second…

Q: Suppose that wedding costs in the Caribbean are normally distributed with a mean of $6000 and a…

A: Note: Hey as per our honor code i can answer only three sub parts. Thanx

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

A:

Q: The diameters of watermelons at a local supermarket are normally distributed with a mean of 10…

A: Let X denote diameters of watermelons at a local supermarket. Given that X follows Normal(mean = 10,…

Q: A livestock company reports that the mean weight of a group of young steers is 1142 pounds with a…

A: Let X be a random variable such that X: Weight of a young steer X~N1142, 792 a) The probability of…

Q: n the first quarter of 2019, the average home loan for first time buyers was R950, 000. Assuming a…

A: Given : In the first quarter of 2019, the average home loan for first time buyers was R950, 000…

Q: A small pilot study was conducted to compare cholesterol levels in individuals before and after a…

A: Preliminary calculation:Using the EXCEL formula “=NORM.S.INV(1– (0.05/2))”, the z-value for 95%…

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A:

Q: In a certain province, the set of recorded midday temperature readings for the month of April is…

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A: Null Hypothesis: A hypothesis which is tested for plausible rejection is called the Null Hypothesis…

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A:

Q: A business owner usually requests freelancers to work with, where he pays his freelancers an average…

A: From the given information, the mean is 15.90 and standard deviation 1.50.

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A: Givenstandard deviation(σ)=0.5x=13 ounces

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A:

Q: In a factory producing glasses, the weights of glasses are known to have a mean of 160 grams. It is…

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Q: A livestock company reports that the mean weight of a group of young steers is 1106 pounds with a…

A:

Q: Soum that the red blood cell counts of women are normally distributed with a mean of 4.577 million…

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Q: Assume the mean useful life of a particular light bulb is 2,000 hours, which is normally distributed…

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Q: 21 year old men rates at rest are normally distributed with a mean of 70 beats per minute, and a…

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Q: The annual incomes of middle management employees is approximately normally distributed with a mean…

A:

Q: Suppose that the mean retail price per gallon of regular grade gasoline in the United States is…

A: Given,mean(μ)=$3.41Standard deviation(σ)=$0.10

Q: The results of a national survey showed that on average, adults sleep 6.9 hours per night.Suppose…

A:

Q: A livestock company reports that the mean weight of a group of young steers is 1130 pounds with a…

A:

Q: A recent study found that 61 children who watched a commercial for potato chips featuring a…

A: Denote μ1, μ2 as the population mean weights of potato chips eaten by children who watched the​…

Q: A nutritionist claims that the mean tuna consumption by a person is 3.3 pounds per year. A sample of…

A: (a) Let μ denotes the population mean tuna consumption. The claim of the test is that the mean tuna…

Q: A livestock company reports that the mean weight of a group of young steers is 1172pounds with…

A: a) It is given that the mean weight of a group of young steers follows normal distribution with mean…

Q: suppose the average time to fill a routine prescription at a local pharmacy is 35 minutes based on…

A: Given data,Mean μ=35sd    σ=11x=48z=?

Q: A nutritionist claims that the mean tuna consumption by a person is 3.6 pounds per year. A sample…

A: Given that  Claim :  Mean tuna consumption by a person is 3.6 pounds per year Sample size (n) = 90…

Q: Write down the formulas for the standard deviation of p.

A: Let sample size = n Sample proportion = p̄

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

A:

Q: A nutritionist claims that the mean tuna consumption by a person is 3.5 pounds per year. A sample of…

A: (a) Let μ is defined as the population mean tuna consumption by a person. The claim of the test is…

Q: Suppose that the amount of time that takes place for the Bureau of Internal Revenue to send refunds…

A: Solution: 4. Let X be the amount of time. From the given information, X follows normal distribution…

Estimation

A new framework of data analysis where the new statistical methods are used for interpreting the results and analyzing the data is known as estimation in statistics.