The diameter of a brand of tennis balls is approximately normally distributed, with a mean of 2.69 inches and a standard deviation of 0.03 inch. A random sample of 11 tennis balls is selected. Complete parts (a) through (d) below. b. What is the probability that the sample mean is less than 2.68 inches? P(X< 2.68) = 0.1345 (Round to four decimal places as needed.) c. What is the probability that the sample mean is between 2.67 and 2.71 inches? P(2.67

Q: The head circumferences of women are normally distributed with a mean of 32 cm and a standard…

A: We have given that.   X~N( μ , ?^2 )   μ =32 , ? =9   , n= 16   Z-score =( x - μ )/?   Note…

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A: P(X&gt;30)=1-Pz&lt;30-311045=1-P(z&lt;-0.67)=1-0.2514=0.7486

Q: What proportion of the population would be expected to have a petal length (a) greater than 4.5 cm?…

A: Let , X→N(μ=3.5 , σ=0.5) Our aim is to find the following :  a) The proportion would be expected to…

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A: Given that mean =0.75 sd =0.004

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Q: The total energy needed during pregnancy is normally distributed, with a mean of 2600 kcal/day and a…

A: It is given that the mean is 2,600, the standard deviation is 50 and the sample size is 25.

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A: P(X&lt;30)=Pz&lt;30-28540=P(z&lt;2.53)=0.9943

Q: A bank auditor claims credit card balances are normally distributed, with a mean of $3,500 and a…

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Q: For a normal distribution curve with a mean of 15 and a standard deviation of 5, which range of the…

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Q: A manufacturer knows that their items have a lengths that are skewed right, with a mean of 19.6…

A: The answer is attached below,

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A: Let "X" be the time between taking the medication and getting relief.

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Q: A candy company has calibrated their machines to fill each bag of candy to an average weight of 500…

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A: Given, Mean = 34 Standard deviation = 7 Sample size = 9   The objective to is find the probability…

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A: Let X be the transport time. From the given information, X has mean µ=28 minutes and a standard…

Q: A population of Gala apples has a mean m=0.40 lbs and a standard deviation s=0.16 lbs. For a sample…

A: Solution: Let X be the variable. From the given information, m=0.40, s=0.16 and n=20.

Q: a) What is the probability a randomly selected student will read more than 88 WPM?  b)What is the…

A: Answer: Given that the reading speed of second grade students is approximately normal mean = μ = 83…

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A: Given that  The weight of the package is normally distributed with a mean of 650 g and a standard…

Q: The average price of a kilogram of ham is 1,300. Assume that the standard deviation is 150. If a…

A: given  average =μ= 1300 standard deviation=σ= 150 random sample= n = 30

Q: For random samples of size n = 16 selected from a normal distribution with a mean of µ = 75 and a…

A: sample size: n = 16mean: µ = 75 standard deviation: σ = 20   To find c such that, P( x¯ &lt;c )…

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Q: For a normal distribution curve with a mean of 15 and a standard deviation of 4, which range of the…

A: Let X be the random variable from normal distribution with mean (μ) = 15  and standard deviation (σ)…

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A: Given, μ=0.002σ=0.0004 X be a random variable that belongs the diameter of the dot produced by…

Q: The average price of a kilogram of ham is P1,300. Assume that the standard deviation is P150. If a…

A:

Q: On the Gulf Freeway at 7:00 AM, the average travel time from Beltway 8 to Downtown is 29.5 minutes…

A: Given that mu =29.5,s.d=11.2

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Q: A 12 oz can of soda has a mean volume of 12 oz ,with a standard deviation of .25 oz. How common are…

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Q: Suppose a batch of metal shafts produced in a manufacturing company have a standara deviation of 1…

A: From the provided information, Mean (µ) = 201 inches Standard deviation (σ) = 1 X~N (201, 1)

Q: The personal office at a large electronics firm regularly schedules job interviews and maintains…

A: Given: Population mean μ=34Population standard deviation σ=7 Sample size(n)  = 9 Consider X be the…

Q: Traveling between University of Santo Tomas and Rizal Park, Manila via shuttle bus takes, on…

A: Solution: Let X be the transport time. From the given information, X has mean µ=31 minutes and a…

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A: Given Data : Population Mean,μ = 3 Population Standard Deviation,σ = 0.39