a population iS modelled by the standard normal distribution curve and z is a randomly selected measure from the poalation, find m A (২८০-१०)%3D a) b) ACz>2.40) =
Q: et X, has a normal distribution with a mean of 100 and a standard deviation of 4. the z value for X…
A: Given,μ=100σ=4x=80z=?
Q: Let, X has a normal distribution with a mean of 40 and a standard deviation of 8. The z value for x…
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Q: About w% of the area under the curve of the standard normal distribution is between z=-1.302 and…
A: standard normal curveX~N(0,1)μ=0σ=1we have to find out the p(-1.302<Z<1.302)=?
Q: Using the table of the areas under the normal curve, find the z scores if the area is 0.2764.
A:
Q: X shows a normal distribution with a mean of µ=50 and a standard deviation of σ=10. What standard z…
A: Given data,Mean μ=50sd σ=10x=55z=?
Q: d. Find v so that P >to.05,v) = 0.05. S/3 e. What is the distribution of 9X-X9 8 and its standard…
A: Xi~N(μ=2, σ2=42)
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A: Step 1: Given that middle 70% of area lies between (7, 13) as it is covers the middle the mean lies…
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A: The standard normal distribution has a mean 0 and standard deviation 1.
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A: Given z=-2
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Q: Find two z values so that 44% of the middle area is bounded by them. Use The Standard Normal…
A: P(-z<Z<z)=44%
Q: he thickness of ice at various locations on a frozen lake (in inches) can be represented by the…
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Q: b) Given a normal distribution with µ=30 and 0=6, find the value of x that has 48% area to the left.
A:
Q: The heights of boys at a particular age follow a normal distribution with mean 150.3cm and variance…
A: As per the bartleby guideline if more than one question is asked only first question to be answered…
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A: Solution: Note: Hello! As you have posted 3 different questions, we are answering the first question…
Q: a) The rice bags distributed to local stores by a farm have an average weight of 25kg and a standard…
A: Formula : Z =(X - μ)/σ
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Q: Consider a normal distribution curve where the middle 50 % of the area under the curve lies above…
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Q: In standard normal distribution, what is the area between z = 0 and z = - 2.13 under the normal…
A: Given that, the range is -2.13 to 0.
Q: Given a normal distribution with Z~N(0,1) a) Find P (Z>0.44)? b) Find P (Z<-0.44)? c) Find…
A: Given a normal distribution Z ~ N(0,1) Z= X-mean/standard deviation=X-0/1
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A: Lets Assume : xy~Nu1u2,σ12pσ1σ2pσ1σ2σ22
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Q: Given a normal distribution with μ=30 and σ=6, find (e) the two values of x that contain the…
A: It is given that the mean is 30 and the standard deviation is 6.
Q: The proportion of observation from a standard normal distribution that take values less than 1.5 is…
A: P(Z<1.5)=? By using standard normal table the probability for 1.5 is 0.9332. P(Z<1.5)=…
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Q: f 0.29. Find the probability that the mean GPA of a random sample of 20 students selected from this…
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A: A normal distribution follows a bell shaped curve which is centred at the mean and it is also called…
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Q: The height of an 8th grader is modeled using the normal distribution shown below. The mean of the…
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Q: Consider the standard normal distribution. a) Find: P(z > 2.38) b)Find: P(-2.10 < z < 1.00)
A:
Q: ippose that X has a normal distribution, Find E[ekx].
A: Solution
Q: Consider a normal distribution curve where 60-th percentile is at 18 and the 45-th percentile is at…
A: Let X be the random variable that follows a normal distribution with the characteristics given in…
Q: a) µ= b) σ-
A: P65 = 14 P40= 5 z-critical value at alpha (0.65) = 0.3853 z-critical value at alpha (0.40) =-0.2534…
Q: Sketch the normal distribution with a. μ = −2 and σ = 2. b. μ = −2 and σ = 1/2. c. μ = 0 and σ = 2.
A: a. Sketch for the normal distribution with mean –2 and standard deviation 2 is as follows:
Q: Scores on the SAT form a normal distribution with a mean of µ = 500 with σ = 100. If the state…
A:
Q: 2. In a standard normal curve, find... a) P(Zs 2.80) = p (2.80) b) between Z=-1.28 and z=-0.66%3B c)…
A:
Q: ind the z-score location of a vertical line that separates a normal distribution as described in…
A:
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- Which proportion of a normal distribution is located bwteen z = --1.75 and z = +1.75?Consider a normal distribution curve where 70-th percentile is at 11 and the 30-th percentile is at 2. Use this information to find the mean, u , and the standard deviation, o , of the distribution. a) u = b) σ-Carboxyhemoglobin is formed when hemoglobin is exposed to carbon monoxide. Heavy smokers tend to have a high percentage of carboxyhemoglobin in their blood.t Let x be a random variable representing percentage of carboxyhemoglobin in the blood. For a person who is a regular heavy smoker, x has a distribution that is approximately normal. A random sample of n = 12 blood tests given to a heavy smoker gave the following results (percent carboxyhemoglobin in the blood). Note: For degrees of freedom d.f. not in the Student's t table, use the closest d.f. that is smaller. In some situations, this choice of d.f. may increase the P-value a small amount and thereby produce a slightly more "conservative" answer. 9.1 9.8 10.4 9.8 11.3 12.2 11.6 10.3 8.9 9.7 13.4 9.9 (a) Use your calculator to calculate x and s. (Round your answers to four decimal places.) X = S = (b) A long-term population mean u = 10% is considered a health risk. However, a long-term population mean above 10% is considered a…
- The length of eels (in cm) in a river may be assumed to be normally distributed with a mean of µ = 42 and a standard deviation of o = 6. An angler catches an eel from a river. Let: X = the length (in cm) of an eel a) If the normal length of eels is between 30 cm and 45 cm, what percentage of eels fall within this normal range? Round your answer to 2 decimal places. b) What is the probability that an eel is at least 51 cmin length? Round your answer to 4 decimal places. c) The middle 50% of the lengths (in cm) of the eels are between and Round your answers to 2 decimal places d) Due to the symmetry of the normal distribution we know that DIV 20 - DIV -The mean wage per hour for all 4000 employees working at a large company is RM 10.50 with a standard deviation of RM 5.30. Let x be the mean wage per hour for a random sample of certain employees selected from this company.Total plasma volume is important in determining the required plasma component in blood replacement therapy for a person undergoing surgery. Plasma volume is influenced by the overall health and physical activity of an individual. Suppose that a random sample of 42 male firefighters are tested and that they have a plasma volume sample mean of x = 37.5 ml/kg (milliliters plasma per kilogram body weight). Assume that ? = 7.50 ml/kg for the distribution of blood plasma. When finding an 99% confidence interval, what is the critical value for confidence level? (Give your answer to two decimal places.) zc = (a)Find a 99% confidence interval for the population mean blood plasma volume in male firefighters. What is the margin of error? (Round your answers to two decimal places.) lower limit ___ upper limit ____ margin of error ____ (b)What conditions are necessary for your calculations? (Select all that apply.) A-? is known B-? is unknown C-the distribution of volumes is normal D-the…
- 24 X shows a normal distribution with a mean of µ=50 and a standard deviation of σ=10. What standard z value does the value x=55 convert to? a) 1.0 B) 0 NS) 1.5 D) 2.0 TO) 0.5A Normal distribution has mean =28 and a standard deviation =5. A) find the z score corresponding to x =23. B) find the z score corresponding to x =39 C) find the raw score corresponding to z = -2 D) find the raw score corresponding to z = 1.7Find the z-scores for which 90% of the distribution area lies between -z and z. a) (-1.645, 1.645) b) (-.99, 0.99) Oc) (-1.96, 1.96) d) (-2.33, 2.33)
- Consider a normal distribution curve where 70-th percentile is at 12 and the 45-th percentile is at 7. Use this information to find the mean, μ, and the standard deviation, o, of the distribution. a) με b) σ =The annual rainfall in a certain region is modeled using the normal distribution shown below. The mean of the distribution is 36.5 cm and the standard deviation is 5.2 cm. In the figure, V is a number along the axis and is under the highest part of the curve. And, U and W are numbers along the axis that are each the same distance away from V. Use the empirical rule to choose the best value for the percentage of the area under the curve that is shaded, and find the values of U, V, and W. Percentage of total area shaded: (Choose one) ▼ 200 35 | 55 25 30 40 45 50 ( cm) Submit Continue |Privacy Center © 2022 McGraw Hill LLC. All Rights Reserved. Terms of Use DIl S0 FB F7 esc F3Find the Z scores for which 90% of the distributions area lies between -z and z 1) -1.96 ,1.96 2) -0.99 ,0.99 3) -1.645, 1.645 4) -2.33, 2.33 select the correct answer