1) Anormally distributed random variable has a mean of 80 and a standard deviation of 5. The z-score for x 88.75 is: 2) Suppose you know that the z-score for a particular x-value is -2.25. ,- 50 and o- 3 then x:

Q: (a) What is the level of significance?   State the null and alternate hypotheses. H0: ? = 7.4; H1: ?…

A: (a) From the information given, a 5% level of significance is taken. Thus, the level of significance…

Q: Let x be a random variable that represents the pH of arterial plasma (i.e., acidity of the blood).…

A: Given, Population mean =7.2 Sample size = 31 Sample mean =8.6 Sample standard deviation =3.3 Level…

Q: Let x be a random variable that represents red blood cell count (RBC) in millions of cells per cubic…

A: Given, Let X= 4.9, 4.2, 4.5, 4.1, 4.4, 4.3

Q: x be a random variable that represents the pH of arterial plasma (i.e., acidity of the blood). For…

A:

Q: Suppose X ~N (275,16) A)find the P (X> or = 294) B) Find the P(255< or = 297) C) find the 17th…

A: It is given that the mean is 275 and the standard deviation is 16.

Q: An SRS of 25 recent birth records at the local hospital was selected. In the sample, the average…

A: Given that  x¯=119.6n=25σ=6.5 And the population of all babies born in hospital, the birth weights…

Q: From a sample with n=24​, the mean number of televisions per household is 4 with a standard…

A:

Q: Find each of the requested values for a population with a mean of 72 and a standard deviation of 10…

A: PX≥85.0=PX-μσ≥85.0-7210=PZ≥1.3=1-PZ&lt;1.3=1-0.9032 Excel function=NORM.S.DIST1.3,TRUE=0.0968

Q: Let x be a random variable that represents red blood cell count (RBC) in millions of cells per cubic…

A: Answer Given The population mean= 4.78This is left-tailed test.

Q: Suppose the  scores of students on an exam are normally distributed with a mean of 520 and a…

A:

Q: The random variable X has a normal distribution with a variance of 16 and an unknown mean. If the…

A: Given Data: X is a random variable   Variance (X)=16   X~ Normal (μ, 16) P(x&gt;65)=0.025

Q: A population has a mean of u deviation of o = 10. a. If 3 points were added to every score in the…

A: (a) The population has mean 50 and population standard deviation 10. Calculation: If n points added…

Q: Suppose that a bag of cement has weight that are normally distributed with a mean of 50 kg and a…

A: Given Information: Mean μ=50 Standard deviation σ=1 Sample size n=10

Q: AT scores in one state is normally distributed with a mean of 1488 and a standard deviation of 152.…

A: AT scores in one state is normally distributed with a mean of 1488 and a standard deviation of 152.…

Q: Find the mean and standard deviation of the waiting time for counter A and B.

A: The values for counter A are- 18, 21, 22, 23, 23, 24, 24, 25, 25, 25, 26, 30, 32, 34, 50 The values…

Q: Use z scores to compare the given values. The tallest living man at one time had a height of 221 cm.…

A: Given, Let X be the height of the person Height of the tallest man living, X1=221 cm Height of the…

Q: The temperature at any random location in a kiln used in the manufacture of bricks is normally…

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Q: Given a normal distribution with mean of 67 and assumes a value less than 50 is 0.0034.

A:

Q: A population has a u=50 and o=10. If these scores are transformed into z- Scores, the population of…

A: Given that mean =  E(X) = 50 and SD(X) = 10, then  Var(X) = 102 = 100

Q: A population has a mean of 200 and a standard deviation of 50. Suppose a sample of size 100 is…

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Q: A normally distributed random variable has a mean of 449. If a score of 433 lies two standard…

A: Given: μ=449 A score of 433 lies two standard deviations below the mean, it means that, μ-2σ=433

Q: In an examination, scores of 80 and 98 correspond to standard scores of -0.6 and 1.4 respectively…

A: Given: For X1=80   Z1=-0.6For X2=98   Z2=1.4

Q: The amounts of sugar in a serving of children's breakfast cereals is normally distributed with a…

A:

Q: Let x be a random variable that represents red blood cell count (RBC) in millions of cells per cubic…

A: Given that n=6

Q: An elevator has a play card stating that the maximum capacity is 1980 pounds 12 passengers so 12…

A:

Q: Suppose that the duration of a particular type of criminal trial is known to be normally distributed…

A:

Q: A beverage factory machine fills can with chocolate drink follows the normal distribution with a…

A: