Question 10: The length of needles produced by a machine has a standard deviation of 0.03 inches. Assuming the distribution is normal, how large of a sample is needed to determine, within a margin of error of 0.008 inches, the mean length of all needles produced to 9 Answer:

Q: Given a normal distribution (X) with mean = 100 and standard deviation (σ) = 10,  w hat is the…

A: According to the provided information, Mean (μ) = 100 Standard Deviation (σ) = 10

Q: Question 4 According to a college survey, 67% of all students work full time. Find the standard…

A: As per our guidelines, we can solve only the first question. Kindly, repost the other for an answer.

Q: Question 5 10 pts For a normally distributed population with a mean of 35 and a standard deviation…

A:

Q: Question 5. (CHILDHOOD NEVER COMES BACK) Bubba bought a bubble blower machine which produced 3125…

A: Question 5. The symmetric bell shaped curve is, The proportion of bubbles have age more than 17…

Q: QUESTION 10 Given a normal distribution with mean 40 and standard deviation 5, the value of x that…

A: Given data,μ=40σ=5P(X<x)=0.33P(Z<-0.44)=0.33z=-0.44

Q: Question 11 You collect data on N = 15 student weights and find that the average student weight (X)…

A:

Q: Given a normal distribution (X) with mean = 100 and standard deviation (σ) = 10,  w hat is the…

A: X follows a Normal distribution with mean = 100 and S.D = 10 Then z=(x-mean)/SD = (x-100)/10…

Q: Question 7 Calculate the standard deviation of the data shown, to two decim 5.8 224 29.7 26.5 28.4

A: The formula of sample standard deviation is,

Q: The lengths of pregnancies are normally distributed with a mean of 269 days and a standard deviation…

A: (a)  The probability of a pregnancy lasting 309 days or longer is 0.0038, which is obtained below:…

Q: Question 1 The bulk density of pima clay loam follows normal distribution with mean of 1.75 g/cm³…

A: Given Mean(μ)=1.75 g/cm3standard deviation(σ)=0.25  g/cm3

Q: Question 13: The length of human pregnancies from conception to birth approximates a normal…

A: As per guideline expert have to answer first question only.

Q: Question 9 The systolic blood pressure of adults in the USA is nearly normally distributed with a…

A:

Q: Given a normal distribution (X) with mean = 100 and standard deviation (σ) = 10,  w hat is the…

A: We have to find given probability...

Q: Question 10 The liquid volume packaged in a bottle of A-brand orange juice follows a normal…

A: Solution

Q: Question 9 For the standard normal distribution, the area to the left of z = 1.15, rounded to four…

A: Since you have asked multiple question, we will solve the first question for you. If you want any…

Q: QUESTION 9 If X has a normal distribution with mean 60 and standard deviation 6, which value of X…

A:

Q: The duration of a lunch break for one employee at a manufacturing company follows a normal…

A:

Q: Question 10 (12.5 points) To two decimal places, what is the standard deviation of these scores:…

A:

Q: QUESTION 2 The IQ test has a mean of 100 and a standard deviation of 15. Suppose a simple random…

A: Since you have asked multiple question, we will solve the first question for you. If you want any…

Q: Question 13 Suppose that the distance of fly balls hit to the outfield (in baseball) is normally…

A: We have given that.   X~N( μ , ?^2 )   μ = 254 , ? = 43   Z-score =( x - μ )/?

Q: Question 1-35 The exam scores for 200 students are normally distributed with a mean of 72 and a…

A: To find number of students score between 72 & 82

Q: A population of 33 scores has a sum of squared deviations value of SS = 507.09. What would be the…

A: Given that, The formula for calculating the population standard deviation is,

Q: Question 13 Given a normal distribution (X) with mean = 100 and standard deviation (σ) = 10,  w hat…

A: Given information Mean µ = 100 Standard deviation σ = 10 Probability that X < 90 is given by

Q: Question 15 The grades for a standardized test are normally distributed with a mean of 65 and a…

A:

Q: Question 2: The claim is that for the population of adult females, the mean blood presure is 400.…

A:

Q: QUESTION 7 Nabisco claims that Chip Ahoy Cookies have an x=28.67 per cookie with a SD=2.67. Assuming…

A: According to our policy we can answer only first question for remaining please repost the question.

Q: Given a normal distribution (X) with mean = 100 and standard deviation (σ) = 10,  w hat is the…

A: we have to find given probability..

Q: QUESTION 8 The weight, in grams, of vacuum-packaged meat product is normally distributed with…

A: For the given data Find all the required

Q: with mean = 100 and standard deviation (σ) = 10,  w hat is the probability that X < 81?

A: Given that  Normal distribution with  Mean (μ) = 100 Standard deviation (σ) = 10   We know that…

Q: Question 5 The heights of the 430 Candidates for the Elite Military Unit have an approximate…

A: Formula of z score is , z = x-μσ Z score is the standard normal variable with mean μ = 0 and…

Q: Question 14 The frequency distribution of the speed, in kilometres per hour (km/h), of a sample of…

A:

Q: Question 4: In a normal distribution, with mean of 84 and standard deviation of 6, determine P(X >…

A: You have posted multiple questions, as per guidelines I am answering only first question that is…

Q: QUESTION 14 The line width for a semiconductor manufacturing is assumed to be normally distributed…

A: Answer:-  Let, X be the random variable follows N(9,2.1).

Q: QUESTION 18 A researcher wants to estimate mean commuting distance within plus or minus two miles…

A:

Q: Question 22 An article reports that its author used a 25-item test (with dichotomous scoring for…

A: Reliability is used to measure the overall consistency of the measure or how extend a material or…

Q: QUESTION 16 A certain machine makes electrical resistors having a mean resistance of 50 ohms and a…

A:

Q: Given a normal distribution (X) with mean = 100 and standard deviation (σ) = 10,  w hat is the…

A: Given a normal distribution (X) with μ= 100 and σ = 10.

Q: Question 12 A patient visits her doctor with concerns about her blood pressure. If the systolic…

A: Solution: Let X be the patients systolic blood presssure reading during a given day has a normal…

Q: What is the standard deviation of the following: 33, 35, 42, 38, 23, 37

A: We find the mean of the given values

Q: QUESTION 15 "For a normal distribution with a mean = 130 and a standard deviation = 22, what would…

A:

Q: Question 10 The average and standard deviation of the weights of 350 Indian students are 55 kg and 3…

A:

Q: Given a normal distribution (X) with mean = 100 and standard deviation (σ) = 10,  w hat is the…

A:

Q: Question 1 Suppose a waitress keeps track of her tips, as a percentage of the bill, for a random…

A: GivenMean(μ)=14%standard deviation(σ)=3%sample size(n)=60

Q: Given a normal distribution (X) with mean = 100 and standard deviation (σ) = 10,  w hat is the…

A: We have given that the random variable X is normally distributed with mean 100 and standard…

Q: QUESTION 7 "For a population with mean = 135 and a standard deviation = 15, the 2-score…

A: As given,  For the population, the mean is 135 and the standard deviation is 15. That is, µ = 135…

Q: Question 9 1 pts A data set of class exams is approximately normally distributed with mean 75 and…

A:

Q: Given a normal distribution (X) with mean = 100 and standard deviation (σ) = 10,  w hat is the…

A: Given, μ=100σ=10P(X&gt;105)=?

Q: Illustration 19.29. Standard deviations In two samples of size 100 each were found to be 13.9 and…

A:

Q: Question 1 Consider a sample with a mean of 30 and a standard deviation of 2.5. Use Chebyshev's…

A:

Q: Larger values of the standard deviation result in a normal curve that is   a. skewed to the left.…

A: Solution Given That Larger values of the standard deviation result in a normal curve that is…