PVC pipes is manufactured with a mean diameter of 1.01 inch and a standard deviation of 0.003 inch. Find the probability that a random sample of n = 9 sections of pipe will have a sample mean diameter greater than 1.009 inch and less than 1.012 inch. With solution please, Thank you.
Q: Calculate the z-score. The amount of advertising per hour of broadcast time has an average of 17…
A: From the provided information, Mean (µ) = 17 minutes Standard deviation (σ) = 2.7 minutes X~N (17,…
Q: A sample is collected from the items produced by a company. The sample size is 49. The standard…
A: Answer: From the given data, Population standard deviation (σ) = 0.32 Sample size (n) = 49
Q: A standardized exam's scores are normally distributed. In a recent year, the mean test score was…
A: Let X be a random variable following normal distribution with mean μ and variance σ2, i.e.,…
Q: Scores for a standardized test are normally distributed with a mean of 1200 and a standard…
A: given data μ = 1200σ = 60 normal distributionn = 64P(1200<x¯<1214) = ?
Q: suming you obtain a random sample of blood glucose level for a 32 individuals from a population and…
A: To find the probability that the mean blood glucose levels for the sample population will be above…
Q: Working in the garden pulling weeds/planting flowers burns an average of 200 calories per hour. If…
A: given data μ=200σ=9normal distribution P(200<x<225)=?
Q: A teacher says that the top 9% of the class received an A on the last test. The scores were…
A: Given that the mean is 67 and the standard deviation is 18. That is, μ=67, σ=18 A teacher says that…
Q: ropolist wishes to estimate the average height of men for a certain race of people.If the population…
A: The sample size can be calculated as: n=z×σE2 Here, z = desired confidence level E = The allowable…
Q: Working in the garden pulling weeds/planting flowers burns an average of 200 calories per hour. If…
A: It is given that Mean, μ = 200 Standard deviation, σ = 9 Z-Score, Z = ( X - μ )/σ
Q: You may believe that each day, men and women spend about the same amount of time using Facebook. We…
A: Hypothesis to be tested: H0: μ men = μ women H1: μ men ≠ μ women Let, men and women are the…
Q: Assume that body temperatures of healthy adults are normally distributed with a mean of 98.2 and a…
A: From the given information X follows normal distribution with mean µ = 98.2 standard deviation σ =…
Q: hat value does your test statistic.T take on with the sample data? hat type of probability…
A: Solution: Given information: n= 10 Sample size μ=25 Population meanx=∑xn=28810=28.8 Sample mean…
Q: b) Suppose you select 4 chocolate bars at What is the probability that the mean weight of 4 randomly…
A: The distribution of actual weights of 8-ounce chocolate bars is approximately normal with a mean of…
Q: ne length of a particular plant in a forest has a mean of 1.3 m and a standard deviation of 0.4 m.…
A: Given: Length of plant = X Mean of X = 1.3 m Standard deviation of X = 0.4 m n = sample size = 40
Q: a male polar on average weighs 525 kg the population of standard deviation is 58 kg suppose that the…
A: Given information- Population mean, µ = 525 kg Population standard deviation, σ = 58 kg Let X be the…
Q: A household spends on average of P5,500 for a 2-week period grocery items. The variable is normally…
A: Given,mean(μ)=5500standard deviation(σ)=700
Q: The average weight loss at a clinic is 10lbs with a standard deviation of 5lbs. What is the chance…
A:
Q: Adult Golden Retrievers have a mean weight of 64 pounds with a standard deviation of 8 pounds. If…
A: In this scenario, it is known that the mean weight is 64 pounds with a corresponding standard…
Q: For a random sample of 90 overweight men, the mean number of pounds that they were overweight was…
A:
Q: A standardized exam's scores are normally distributed. In a recent year, the mean test score was…
A:
Q: In a metal fabrication process, metal rods are produced to a specified target length of EXACTLY 10…
A: From the information, The sample size is, n = 25 The sample mean is, x¯=9.8 feet The sample standard…
Q: A random sample of 14 registered nurses in a large hospital showed that they worked on average 43.9…
A: The sample mean is 43.9 and the standard deviation is 2.2.
Q: A company produces steel rods. The lengths of the steel rods are normally distributed with a mean of…
A: given data, normal distribution,μ=264.5σ=1we have to find out the average length separating the…
Q: The director of research and development is testing a new drug. She wants to know if there…
A: Given information- Population mean, µ = 375 Population standard deviation, σ = 24 Sample size, n =…
Q: A standardized exam's scores are normally distributed. In a recent year, the mean test score was…
A: Solution: Let X be the score. From the given information, X follows normal distribution with mean…
Q: The average age of UST employees is 34 years old. Assume the data is normally distributed. If the…
A: Let W be a random variable representing the age of the employees. The average age of the UST…
Q: A company produces steel rods. The lengths of the steel rods are normally distributed with a mean of…
A: Given, Let X be the length of steel rods
Q: ominic would want to estimate the mean of a population which is normally distributed. The standard…
A:
Q: The loss of production because the failed production.. Amount of production that thickness more than…
A: Parameter estimation can be of point or interval estimate. It involves estimation of a parameter of…
Q: for a population with a standard deviation of 10 and mean of 100, draw a bell shaped curve, marking…
A: We have to draw bell shaped curved and marking location of the mean and standard deviation..
Q: Suppose that blood chlorine concentration (mmol/L) has a normal distribution with mean=98 and…
A:
Q: The amount of time people spend at the gym follows a uniform distribution from 45 to 90 minutes.…
A:
Q: The thickness of a part is to have an upper specification of 0.925 and a lower specification of…
A:
Q: the mean of a random sample of size n= 25 is used to estimate the mean of an entire population that…
A:
Q: A standardized exam's scores are normally distributed. In a recent year, the mean test score was…
A: We have, X= A standardized exam's scores the mean test score was 1549 and the standard deviation…
Q: The speed of cars driving past Johnson City High School, on 666 Reynolds Rd, were recorded over one…
A: In this intriguing analysis centered around traffic speeds near Johnson City High School, the…
Q: Find the standard error of the sample mean such that we have 70 random samples with mean 40 and…
A: Sample size (n) = 70mean = 25standard deviation (s)
Q: The total annual precipitation for a region is approximately normally distributed with a mean of…
A: Given information- Population mean, µ = 1050 mm Population standard deviation, σ = 400 mm Let, X be…
Q: The average labor charge for automobile mechanics is OMR 69 per hour. The standard deviation is OMR…
A: Given that the average labor charge for automobile mechanics is OMR 69 per hour. The standard…
Q: Assume that the readings at freezing on a batch of thermometers are normally distributed with a mean…
A: Solution: Let X be the readings at freezing on a batch of thermometer. From the given information, X…
Q: For a certain type of computers, the length of time between charges of the battery is normally…
A:
Q: pls help me and write the solution down on a paper if you can thank you
A:
1.) PVC pipes is manufactured with a
With solution please, Thank you.
Trending now
This is a popular solution!
Step by step
Solved in 2 steps with 2 images
- A standardized exam's scores are normally distributed. In a recent year, the mean test score was 1544 and the standard deviation was 314.The test scores of four students selected at random are 1940, 1290, 2250,and 1420.Find the z-scores that correspond to each value and determine whether any of the values are unusual. (Round to 2 decimal places as needed.)Suppose the masses of a batch of 2000 potatoes have a mean of 60 grams with a standard deviation of 8 grams. Assuming the weights have a normal distribution, predict the number of potatoes that would have masses between 45 and 55 grams. Sketch the distribution curve, shade the required probability, and show horizontal scales the population parameters and the z-scores. Solve the problemA manufacturer of bolts has a quality control policy that requires it to destroy any bolts that are more than 2 standard deviations from the mean. The quality control engineer knows that the bolts coming off the assembly line have a mean length of 8cm with a standard deviation of 0.05 cm. For what length will a bolt be destroyed?
- The strength of the welds in a new manufacturing process is measured by the amount of weight needed to break the weld. The strength of the welds is normally distributed with mean 583 pounds. 30% of the welds had strength less than 500 pounds. What is the standard deviation of the strength of the welds?Jeff is doing an experiment involving mice. The mice weights have mean weight 3.74 ounces and standard deviation 0.026 ounces. Jeff selects 100 mice independently and calculates the sample mean, x̄, of their weights. What is the standard deviation of x̄?A standardized exam's scores are normally distributed. In a recent year, the mean test score was 1471 and the standard deviation was 317. The test scores of four students selected at random are 1900,1200,2200,and 1370. Find the z-scores that correspond to each value and determine whether any of the values are unusual.
- A manufacturer of phone batteries determines that the average length of talk time for one of its batteries is 470 minutes. Suppose that the standard deviation is known to be 32 minutes and that the data are approximately bell-shaped. Estimate the percentage of batteries whose talk time is between 406 minutes and 534 minutes. Estimate the percentage of batteries whose talk time is less than 438 minutes. Estimate the percentage of batteries whose talk time is more than 534 minutes. answer in excelA reading class can read an mean of 175 words per minute and a population standard deviation of 20 words per minutes. The top 3% of the class is to receive a special award for a random sample of 49 students. What is the minimum average number of words per minute a student would need to read in order to get the award for a random sample of 49 students? Assume the data is normally distributed.A random variable that is normally distributed where mean = 60, standard deviation = 2 and x=55. What is the corresponding value of z and interpret its computed value.
- Acorns in the northern Atlantic regions of the U. S. have an average volume of 3.75 cubic centimeters, with a standard deviation of .85 centimeters. If we were to collect 1000 samples of 300 randomly-selected acorns, describe the sampling distribution for the sample mean of acorn volumes. Round to the nearest hundredth (two decimal places) if necessary. Shape: Center: Spread:A random sample of sizen=20 has the mean 20 and standard deviation 5. What is the standard error of the mean ?he average amount of time boys and girls spend playing sports each week is believed to be the same. A sample of equal size n is taken from boys and girls , the mean of the boys is 29 hours with standard deviation 4 hours and the mean of the girls is 27 hours with standard deviation 3 hours Both populations have a normal distribution. The calculated value is 1.2 n =