Estimate the 95% confidence interval for the standard deviation if a research of (A + 8) Chocolate brands shows that the number of A calories as standard deviation for these Chocolate brands. Assume the variable is normally distributed. Note: A = 19

Q: Use z scores to compare the given values. Based on sample​ data, newborn males have weights with a…

A: From the provided information, Newborn male have weights with mean (µM) = 3287.8 g Standard…

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Q: Assume that adults have IQ scores that are normally distributed with μ=38 and a standard deviation…

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Q: Use the given data to find the 95% confidence interval estimate of the population mean µ. Assume…

A: Given that  n = 25 mean = 104 s = 15

Q: Show that the standard deviation of z-scores equals 1

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Q: The lengths of pregnancies in a small rural village are normally distributed with a mean of 261 days…

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Q: The random variable X represents the average number of texts a teenager sends, where the…

A: Given, μ = 450σ = 150To find,P (X > 700) = ?

Q: Assuming that the estimator has a normal distribution, the 95% confidence interval for the slope is…

A: Given: The regression equation is given as, ∆ur^=2.81-0.23×gy  R2=0.36SER=0.78Standard error of…

Q: Express the quartiles, Q1, Q2, and Q3, of a normally distributed variable in terms of its mean, μ,…

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Q: Assume that z-scores are normally distributed with a mean of 0 and a standard deviation of 1. If…

A: Let z scores are normally distributed with mean of μ=0 and standard deviation of σ=1 The value of b…

Q: The 2018 Math Portion of the SAT score are normally distributed with a mean of 527 and a standard…

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Q: A distribution is given as X ~ U(0, 12). What is the theoretical standard deviation?

A: concepts and reasonuniform distribution is a continuous probability distribution.it is defined…

Q: The average number of acres burned by forest and range fires in a large New Mexico county is 4,300…

A: GivenMean(μ)=4300standard deviation(σ)=750

Q: A random sample of 81 credit sales in a department store showed an average sale of $75.00. From past…

A: Solution: Let X be the amount of sale. From the given information, n=81, x-bar=$75 and σ=$27.

Q: Find the 90 percent confidence interval for the variance and standard deviation for the time it…

A: Solution :  Given : n = 27             s = 8.9 minutes             α = 0.1 Confidence interval for…

Q: A sample of 50 students was taken from the local university. These students spent an average of R170…

A: Given information- Sample size (n) = 50 Mean x̅ = R170 Standard deviation (s) = R25.50 Significance…

Q: C. Find a 95% confidence interval for the average life time of all the television sets produced by a…

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Q: The mean weight of 500 male students at a certain college is 80 kg, and the standard deviation is 8…

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Q: Calculate the mean, the standard deviation and the 95% confidence interval for the data sets in E…

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Q: A medical statistician wants to estimate the average weight loss of people who are on a new diet…

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Q: Assume that adults have IQ scores that are normally distributed with a mean of 103 and a standard…

A: It is given that the IQ scores follow normal distribution with mean 103 and standard deviation 15.…

Q: Find a 90% confidence interval for the difference between the population means for the two…

A: Given : For Sample 1 x̄1 = 3.11 n1 = 12

Q: A medical statistician wants to estimate the average weight loss of people who are on a new diet…

A: Given,standard deviation(σ)=8margin of error(E)=2α=1-0.94=0.06α2=0.03Z0.03=1.8808       (from…

Q: Hello, how do you calculate this? Thank You!

A: Compute the 90% confidence interval for the population mean.Since the sample size is small and the…

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Q: Use The t Distribution Table to find the t/α2 value for a 98% confidence interval for the mean when…

A: Given that n = 17 Degrees of freedom = df = n - 1 = 17 - 1 = 16 t/α2 value for a 98% confidence…

Q: On average, the level of radioactivity was 198.2 gammas. The standard deviation was 3.3 gammas.…

A: Given information Sample size n = 10 Sample mean x̅ = 200 Population standard deviation = 3.3…

Q: To find the standard deviation of the diameter of wooden dowels, the manufacturer measures 19…

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Q: Assume that z-scores are normally distributed with a mean of 0 and a standard deviation of 1. If…

A: Let z-scores are normally distributed with a mean of 0 and a standard deviation of 1.

Q: What z-score would be associated with the value x = 172?

A: Given that Mean = 112 SD = 10 And value X = 172

Q: Calculate the 95% confidence interval and the 99% confidence interval for a sample of 81 where the…

A: Given : Sample Size, n = 81 Sample Mean, x̄ = 50 sample standard…

Q: A set of data items is normally distributed with a mean of 40 and a standard deviation of 8. Convert…

A: Given:  Random variable x follow normal distribution with mean mu=40 ,sd=8  Then z score:…

Q: Use The t Distribution Table to find the t2 value for a 98% confidence interval for the mean when…

A: Obtain the degrees of freedom.   The degrees of freedom is obtained below as follows:   From the…

Q: . If the probability of a defective bolt is 0.1, find (a) the mean (b) the standard deviation for…

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Q: The standard deviation of a normal random variable X is $50 . Given that P(X ≤ $40) = .25, what is…

A: Given data,σ=50x=40P(X ≤ $40) = .25μ=?

Q: Suppose that water usages in American showers are normally distributed, with an average shower using…

A: Hi! Thank you for the question, As per the honor code, we are allowed to answer three sub-parts at a…

Q: Assume that the error term u is normally distributed with a mean of 0 and a standard deviation of…

A: The term standard deviation is denoted by the symbol sigma (σ).  It is given that u is normally…

Q: A medical statistician wants to estimate the average weight loss of people who are on a new diet…

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Q: Assume that the population has a normal distribution.  A laboratory tested twelve chicken eggs and…

A: It is given that sample mean is 185 and standard deviation is 17.6.

Q: A group of friends compares what they received while trick or treating. They find that the average…

A: Solution: Let X be the number of candies. From the given information, µ=43, σ= 2 and z-score is…

Q: Assume that the heights of women are normally distributed with a mean of 62   inches and a standard…

A: Given data normally distributed with mean of 62 inches and standard deviation of 2.5 inches.

Q: Approximately how many of the cartridges in the sample would you expect to be replaced under the…

A: Consider X as a random variable that follows the normal distribution with a mean 4302 and a standard…

Q: on an exam, Tom scores 12 points above the mean and has a z-score of z=+2.00. the standard deviation…

A: It is given that the difference between mean and raw score is 12 and the z score is 2.

Q: The weight loss for the first six months of a diet program is normally distributed with an average…

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Q: Use the normal distribution of fish lengths for which the mean is 8 inches and the standard…

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: A set of data items is normally distributed with a mean of 40 and a standard deviation of 6. Convert…

A: Given set of data is normally distributed with mean = 40Standard deviation = 6The Z score for any…

Q: A survey indicates that the customers of a local supermarket spend an average of 45 minutes shopping…

A: The customer of local supermarket spend an average of 45 minutes for shopping. The standard…

Q: A set of data items is normally distributed with a mean of 60 and a standard deviation of 9. Convert…

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Q: A researcher claims that the amounts of acetaminophen in a certain brand of cold tablets have a…

A: Hypothesis: Hypothesis is an assumption about the parameter of the population which will be made…

Statements and Logic

Logic is the analysis of general patterns of thoughts without regard to any specific sense of context.