Assume that a randomly selected subject is given a bone density test. Those test scores are normally distributed with a mean of 0 and a standard deviation of 1. Draw a graph and find the probability of a bone density test score greater than 0.89. Sketch the region. Choose the correct graph below. OA. OB. C. O D. 0.89 -0 89 0.89 -0.89 0.89

Q: A random sample of 85 eighth grade​ students' scores on a national mathematics assessment test has a…

A: Answer: Given, n=85 μ=275 x=284 σ=30 (a) Option E. H0:μ=275  VS  HA:μ>275(claim)

Q: A random sample of 83 eighth grade students' scores on a national mathematics assessment test has a…

A: We have given that Sample size of eighth grade student =83 Sample mean =289 Population mean =280…

Q: A random sample of 76 eighth grade students' scores on a national mathematics assessment test has a…

A: a. Null hypothesis: µ=260. Alternative hypothesis: µ>260(claim). Correct answer is option (E) b.…

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A: Given a group of student's math grades is normally distributed with a mean of 195 and a standard…

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Q: When n 2 30 and the population standard deviation is not known, what is the appropriate…

A: Given : n≥30 population standard deviation is not known.

Q: Suppose that P(z<a)=0.67. What is the value of a? NOTE: a. You are advised to draw the normal…

A:

Q: Assume that the normally distributed variable X having mean 17 and standard deviation 2.5, find (a)…

A: Solution: Given information: Let X be the normally distributed variable with mean μ=17 and standard…

Q: A random sample of 82 eighth grade students' scores on a national mathematics assessment test has a…

A: Solution: State the hypotheses. Null hypothesis: That is, the mean score for the state’s eighth…

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A: There are two independent samples which are women and men. We have to test whether women and men…

Q: 35 - 65 e 24 /24F 91 99 110 91 144 176 80 86 124

A: “Since you have posted a question with multiple sub-parts, we will solve first three sub-parts for…

Q: Suppose a normal distribution has a mean of 98 and a standard deviation of 6. What is P(x2 104)? A.…

A: We have given that.   X~N( μ , ?^2 )   μ=98   , ?=6   Z-score =( x - μ )/?

Q: A normal distribution has a mean of μ = 70 and a standard deviation of σ = 8. For each of the…

A: Given information Mean μ = 70 Standard deviation σ = 8

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A: The z-score is defined as: z=x-μσ Here, μ=meanσ=standard deviation

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Q: Refer to the accompanying data set and use the 25 home voltage measurements to construct a frequency…

A: Given, Voltage(volts) Frequency 123.5-123.6 5 123.7-123.8 5 123.9-124.0 4 124.1-124.2 6…

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A: Given the data pointsClass width = 0.50Lower class interval of first class interval = 0.00 The 6…

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Q: An instructor gives a 100 point examination in which the grades are normally distributed. hte mean…

A: Given:- The sample follows a normal distribution with a mean, μ =60, &amp; a standard deviation, of…

Q: A random sample of 86 eighth grade students' scores on a national mathematics assessment test has a…

A: Given information Sample mean x̅ = 289 Population mean µ = 285 Sample size = 86 Standard deviation σ…

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A: Hey there! Thank you for posting the question. Since there are multiple questions posted, we will…

Q: Based on the graph of this normal distribution. a) The mean is _____ .  b) The standard deviation…

A:

Q: A random sample of 85 eighth grade students' scores on a national mathematics assessment test has a…

A: Given: Sample size, n = 85            Sample mean, M = 278   Assuming, population SD, σ=31 To test…

Q: A random sample of 78 eighth grade students' scores on a national mathematics assessment test has a…

A: The summary of the statistics is, x¯=275,σ=33,n=78,μ=270 The null and alternative hypothesis is,…

Q: Suppose a normal distribution has a mean of 79 and a standard deviation of 7. What is P(x 93)? O A.…

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Q: Find the indicated probability. The incomes of trainees at tthe local mill are normally distributed…

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Q: A random sample of 80 eighth grade students' scores on a national mathematics assessment test has a…

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Q: The standard deviation of a population of 10000 volume is 62cm. In the case of "non-refundable…

A: The formula for sample size for a given confidence interval and population standard deviation is:

Q: Suppose a normal distribution has a mean of 50 and a standard deviation of 3. What is P(x≤ 47)? OA.…

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Q: The line width for semiconductor manufacturing is assumed to be normally distributed with a mean of…

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Q: A distribution has a mean of 30 and a standard deviation of 4. Approximately 68% of the distribution…

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Q: Assume the readings on thermometers are normally distributed with a mean of 0°C and a standard…

A: We hvae to find corrcet answer..

Q: Suppose a normal distribution has a mean of 79 and a standard deviation of 7. What is P(xs 93)? O A.…

A:

Q: The time that a customer takes to complete a transaction in the business line at the bank follows a…

A: Given Data Population Mean,μ = 5.4 Population Standard Deviation,σ = 1.7

Q: The line width for semiconductor manufacturing is assumed to be normally distributed with a mean of…

A: Given X is normal Distributed with mean µ = 0.45 and standard deviation σ = 0.05 now will using…

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A: Given: Formula:

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A: Given that  Sample size n =35 Sample mean =12.4 Sample standard deviation =2.1

Q: ssume that the heights of women are normally distributed with a mean of 63 inches and a standard…

A: The formula for the z score is,  The probabilities is computed using standard normal table.

Q: The mean height of 790 students in a school is 151 cm and the standard deviation is 15 cm. Assume…

A: Given dataμ=151σ=1n=790P(119.5&lt;X&lt;155.5)=

Q: The line width for semiconductor manufacturing is assumed to be normally distributed with a mean of…

A: X: the line width for semiconductor manufacturing. X has normal distribution X~N(μ,σ) μ=0.45…

Q: Suppose a normal distribution has a mean of 79 and a standard deviation of 7. What is P(xs 65)? O A.…

A: Normal distribution has mean =79 and SD = 7, p(X&lt;=65) = ?

Q: The diameter of a spindle in a small motor is supposed to be 4.4 millimeters (mm) with a standard…

A: From the provided information, a) Population mean (µ) = 4.4 Standard deviation (σ) = 0.11 Sample…

Q: Assume a poison distribution if A= 0.5, find p(x=1)  the A represents a symbol

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Q: Find the standard deviation for the group of data items. 5,5,5,5,7,9 ​(Simplify your answer.…

A: Solution:Computation of standard deviation:Standard deviation for the group of data items is…

Q: A random sample of 83 eighth grade students' scores on a national mathematics assessment test has a…

A: From the provided information, Sample size (n) = 83 Sample mean (x̄) = 263 Population standard…

Q: following sample of n= 10 scores: 2,3,4,4,5,5,5,6,6,7. assume that the scores are measurements of a…

A: In an ordered (ascending/descending) data set, the formula to find the median is as follows:

Q: . Draw the normal curve using the data given a.x = 30. s = 8 b. x = 83. s = 6 %3D

A:

Q: the heights of 200 plants in a garden follow a normal distribution with mean of 72.3 cm with a…

A: Formula : Z =(X - μ)/σ