QUESTION 5 A manufacturer of a lightbulb claimed that its lightbulbs have a mean lifetime of 700 hours with a standard deviation of 120 hours. You purchased 144 of these lightbulbs with the idea that you would purchase more if the mean lifetime of your sample were more than 680 hours. What is the probability that you will not buy again from this manufacturer?

Q: se the Normal distribution to compute probabilities about the sample proportion of those who…

A: The sampling distribution of the sample proportion is approximately normal with at least 5 expected…

Q: The annual rainfall in a city is normally distributed with a mean of 128 cm, and a standard…

A: GivenMean(μ)=128standard deviation(σ)=13

Q: Question 4…

A: The length of a fully grown hibiscus plant is normally distributed. Mean (μ) = 35cm

Q: QUESTION 1 The life of an animal is normally distributed with a mean of 9 years and a standard…

A: Given ,sample size(n)=36mean(μ)=9standard deviation(σ)=1.5

Q: The probability that a house in an urban area will be burglarized is 5%. A sample of 50 houses is…

A: Let, X is the number of houses that were burglarized. X~Binomialn=50,p=0.05

Q: Question 1  _____________________________________________________________________________ a) On…

A: As per our guidelines we are suppose to do only one question1)a)on average 2.5 faculty reports are…

Q: QUESTION 3 A machine that produces a major part for an airplane engine is monitored closely. In the…

A: Given,margin of error(E)=0.04standard deviation(σ)=0.30α=1-0.95=0.05α2=0.025Z0.025=1.96      (from…

Q: QUESTION 14 When engaging in weight-control (fitness/fat burning) types of exercise, a person is…

A:

Q: A cereal-packing company where the content of cereal boxes must have a mean of 368 grams and a…

A: We have to find probability corresponding to sample mean ( x¯ ) So we have to use sampling…

Q: Suppose that when a Honda dealership sells a Honda Accord, the profit the dealership makes is…

A: Given , Mean = 1200 , Sigma = 350 X ~ N(0,1)

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

A: The standard error can be calculated as: SE=σn Here, σ = Standard deviation n = Sample size

Q: QUESTION 10 Suppose there is a 0.371% chance that a certain age group will be in a car accident…

A: Suppose there is a 0.371% chance that a certain age group will be in a car accident requiring body…

Q: QUESTION 21 The lifetime of a new battery used in a digital clock has a mean of 300 days and a…

A:

Q: Question 2 Assume that a human pregnancy has a population mean of 280 days and a population standard…

A: Since you have posted a question with multiple sub-parts, we will solve first three subparts for…

Q: Question 20: The range of a battery of a newly produced Electric vehicle is normally distributed…

A:

Q: Question 2 – Normal Distribution The time needed to complete a final examination in a particular…

A: Given Information: Mean μ=160 minutes Standard deviation σ=20 minutes. (a) To find the probability…

Q: QUESTION 19 A random sample of n = 169 scores is selected from a population whose mean = 195 and…

A:

Q: Question 6 Suppose a Pharmaceutical company manufactures a specific drug and needs to perform some…

A: Hypothesis Testing: Hypothesis testing is a statistical inference technique that uses sample data…

Q: QUESTION 7 Suppose that total cholesterol in US men aged 35-44 can be modeled by a normal…

A:

Q: I bet $100 on a horse A and $100 on horse B in separate races. On each horse, my expected dollar…

A: Given:   Payoff on horse A = X = $100 Payoff on horse B = Y  = $100 E( X) = 60 E(Y) =  60 SD ( X ) =…

Q: Problem 5 a grocery store's sales experience indicates that its daily apple sales follow a normal…

A: We have given that.   X~N( μ , ?^2 )   μ = 60, ? =15   Z-score =( x - μ )/?

Q: Question 6 – The average starting salary of this year's graduates of a large university (LU) is…

A: Hi, thank you for the question. As per our Honor code, we are allowed to attempt first three sub…

Q: The amounts of ice cream in all such cartons have a normal distribution with a mean of 16 ounces and…

A:

Q: n the country of United States of Heightlandia, the height measurements of ten-year-old children are…

A: It is given that the mean is 54.6 and standard deviation is 1.5.

Q: A bank's loan officer rates applicants for credit. The ratings are normally distributed with a mean…

A: From the information, the mean is 200 and the standard deviation is 50.

Q: Example # 2: The heights if a group of boys are normally distributed with a mean of 54 inches and…

A: Given :  Mean = μ = 54 Standard deviation  = σ = 2.5

Q: Question 1 A barometer is used to measure average daily atmospheric pressure. The daily pressure is…

A: Given that,  X~N(mu=1012hPa, sigma=12hPa)  We have to find P(X>1030 hPa) and P(1002…

Q: QUESTION 6 The lifetime of a certain battery is normally distributed with mean value of 10 hours and…

A: X~Normally distributionMean=ν=10 hoursStandard deviation =σ=1 hourn=16⇒Mean for all batteries…

Q: QUESTION 10 If a random sample of size 14 is drawn from a normally distributed population with mean…

A: Given data: n = 14 Mean = 43.5 Standard deviation = 2.7 To find: What is the probability that the…

Q: Question 2: The Distribution of the Sample Mean Smartphones are designed to function between 0 and…

A: Given,mean(μ)=3standard deviation(σ)=0.9sample size(n)=36T0=The total temperature

Q: cereal-packing company where the content of cereal boxes must have a mean of 368 grams and a…

A: Solution: Given information: μ= 368 grams Population mean σ= 15 gram  Population standard deviation…

Q: QUESTION 9 What is the probability of measuring the length of a projectile as 3.35 cm or less, if…

A: NOTE*** As per bartleby guidelines for more than one question asked only first to be answered, send…

Q: The management of a supermarket wants to adopt a new promotional policy of giving free gift to every…

A: We know that, the expenditure for all customers, X ~ N(400, 900) or, X ~ N(400,302) or, Z = (X -…

Q: Question 3)  According to the Department of Education, the time college students spend on their…

A: We have to find probability..

Q: Question 3: The Scores on the Graduation project examination are normally distributed with a mean of…

A: We have given that,  X be the random variable from normal distribution with mean (μ) = 527 and…

Q: Question [3]: Extensive data, including that the number of activities per week can be modeled as a…

A:

Q: cereal-packing company where the content of cereal boxes must have a mean of 368 grams and a…

A: From the given information we want to find the probability that sample mean is below 365

Q: John and his friend were recently having a heated discussion about the number of men living in a…

A: Given: μ=5000σ=6000n=800x¯=10000α=0.05

Q: Question 19: The range of a battery of a newly produced  Electric vehicle is normally distributed…

A:

Q: Question 1: Suppose that 36% of all university students regularly eat breakfast. In a random sample…

A: Note: According to our guidelines we can answer only first question and rest can be reposted.

Q: Question 6 The Wall Street Journal reported that almost all the major stock market indexes had…

A: μ = 27, σ = 20, x = 30 z = (x - μ)/σ = (30 - 27)/20 = 0.15 P(x ≥ 30) = P(z > 0.15) = 0.4404 μ =…

Q: Question 6: If the random variable X has a normal distribution with mean 40 and std. dev. 5,…

A: Hello! As you have posted more than 3 sub parts, we are answering the first 3 sub-parts.  In case…

Q: QUESTION 9 The length of an adult Great White Shark is normally distributed with a mean of 3.4…

A: We have given that.   X~N( μ , ?^2 )   μ =3.4 , ? =0.5   Z-score =( x - μ )/?

Q: Question 1: A random variable is distributed normally with mean 3200 and standard deviation 800.…

A:

Q: QUESTION 17 When engaging in weight-control (fitness/fat burning) types of exercise, a person is…

A: Solution

Q: According to ongoing clinical research into feline health, the weight of an obese adult male…

A:

Q: Question 2: A random variable is distributed normally with mean 3200 and standard deviation 800.…

A:

Q: Question 1 a) On average 2.5 faulty reports are made to a company's switchboard per day. i. Name the…

A: Given :  On average 2.5 faulty reports are made to a company's switchboard per day.

Q: QUESTION 3 The length of an injection-molded plastic case that holds magnetic tape is normally…

A: Given : μ=90σ=2X~N(μ=90,σ2=(2)2) We want to find,P(X<87 or X>93)=?