A machine produces glass with a nominal thickness of 4mm. In fact the thickness is a Normal random variable with mean 4.168mm and standard deviation 0.12mm. The thickness in mm which 5% of panes exceed is (2 d.p.)?

Q: Assume the random variable X is normally distributed with mean u = 50 and standard deviation o = 7.…

A: Let X be the random variable which follows normal distribution with mean 50 and standard deviation…

Q: Consider random samples of size 60 from a population with proportion 0.15. Find the standard error…

A: It is given that, Population proportion = P= 0.15 and a random sample of size 60 has taken from the…

Q: What kind of parameter is applied in the given situation? “The mean height of all Grade 11 students…

A: Given

Q: A population has mean µ = 40 and %3D standard deviation o = 20. What should %3D the sample sizen be…

A:

Q: In a Z-test, the number of degrees of freedom is A none of these B 1 C) n-1 D n-2

A: AS PER GUIDELINE EXPERT HAVE TO ANSWER FIRST QUESTION ONLY.  SOJCE I HAD DONE ALL FOR YOU.  AND ALL…

Q: A student took measurements of the mass of an object using the same balance. The data obtained were…

A: Here Given  data of mass of objects using the same balance. Data are  1.383 g, 1,387 g, 1.389 g and…

Q: What proportion of 10-year old boys is less than 140 cm in height?

A: mean  = 138  standard deviation  = 7  X=  heights of 10-year old boy

Q: A vertical line drawn through a normal distribution at z = -0.50 separates the distribution into two…

A: Suppose a vertical line drawn through a normal distribution at , separates the distribution into two…

Q: What should be the average height of the population

A: Here The 5% of a certain population have height above 160cm. Suppose the height of the said…

Q: normal distribution has a mean of mu = 40 with sd =5. What is the probability of sampling an…

A: we want to find probability of sampling an individual with a score greater than 48

Q: Assume the random variable X is normally distributed with mean u = 50 and standard deviation o = 7.…

A: Given,μ=50σ=7Find 96th percentile?

Q: During rush hour, the traffic speed on a busy highway is found to have mean 42 mph and standard…

A:

Q: For a sample with M = 90, a score of X = 88 corresponds to z = -1.00. What is the sample standard…

A: Solution-: Given: M=90, X=88, z=-1 We want to find the sample standard deviation?​

Q: Suppose a random variable x is best described by a normal distribution with = 60 and o=4. Find the…

A: The mean is 60 and the standard deviation is 4.

Q: A vertical line drawn through a normal distribution at z = +1.40 divides the distribution into two…

A: According to the given information, we have Z score = +1.40 The proportion in the smaller section is…

Q: Assume that the distribution of residuals is approximately normal with mean 0c m and standard…

A:

Q: A vertical line drawn through a normal distribution at z = +1.10 separates the distribution into two…

A: The value of Z ~N(0,1) , and is usually represented as, Z=X-μσ Now, using this form, a Z-table is…

Q: Find the critical value. The critical value is zo =. %3D

A: Given α=0.10

Q: A simple random sample of 144 observations was taken from a large population. The sample mean and…

A: sample mean is given by, x = 120.8 and sample standard deviation is given by, s = 32.46 Number of…

Q: a normal distribution has a mean of u=60 with o=8. for this population, which is the x value that…

A:

Q: Consider random samples of size 50 from a population with proportion 0.80 . Find the standard error…

A:

Q: The lengths of metal bolts are normally distributed with mean μ cm and standard deviation 7 cm. If…

A: Let X be the random variable from normal distribution with mean μ and standard deviation (σ) = 2.5…

Q: In a normal distribution with the mean = 8 minutes and variance = 9. Find the value of m value where…

A: Solution

Q: To assess the air quality in a surgical suite, the presence of colony-forming spores per cubic meter…

A: {12,24,30}

Q: Suppose the standard deviation of the sample mean is equal to 0.6. If a sample of size n=100n=100 is…

A: Given, Sample standard deviation of mean = 0.6 Sample size =100 Population standard deviation is…

Q: What proportion of a normal distribution is located between the mean and z = 1.40? a.…

A: P(0<z<1.40)=?

Q: Given a Normal Distribution with standard error of 11 from a population with a mean of 135 and a…

A:

Q: A random sample of size 1,000 is taken from a population where the population proportion p = .02.…

A: From the provided information,n = 1000Population proportion (p) = 0.02

Q: a) Determine the 3-sigma x -chart control limits Upper Control Limit (UCL- ) = ____ units (round…

A: Statistical process control is used to develop, monitor and finally control products as well as…

Q: Given a Normal Distribution with standard error of 8 from a population with a mean of 120 and a…

A: Step 1: we will use the standard error formula.SE=n​σ​Here, SE is the standard error, sigma is the…

Q: Given a normal distribution with u = 30 and o = 6, find the normal curve area to the left of x = 22.…

A: