Question 4: The time people use their computers before upgrading is normally distributed w years and a standard deviation of 0.5 years. Find the probability that a randomly will use a computer between 2 and 3 years before upgrading.

Q: Question 8 The average monthly mortgage payment including principal and interest is $855 in the…

A: Normal Distribution: A continuous random variable X is said to follow Normal distribution with…

Q: QUESTION 11 The change in smell sensation attributed to COVID-19 by smoking status in a sample of…

A:

Q: QUESTION 17 The change in smell sensation attributed to COVID-19 by smoking status in a sample of…

A: Obtain the probability that a randomly selected case is experiencing extreme reduction in smell…

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: 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: 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 1 A random sample of size n = 64, from a population with standard deviation g=74, is used…

A: Given Information: Sample size (n) = 64 Population standard deviation σ = 7.4 H0:μ=70 against…

Q: Question 5 The mean number of ski injuries at Mont Tremblant that require treatment follows a…

A: Given  X~Pois(λ=3) P(X<2)=?

Q: Question 6 The height of girls follows a normal distribution with mean u = 170 cm and the variance…

A:

Q: Question 8 The lifetimes of interactive computer chips produced by a certain semiconductor…

A:

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 4 [25] The amount of time devoted to preparing for a statistics examination by students is…

A:

Q: QUESTION 12 If a random sample of size 20 is drawn from a normally distributed population with mean…

A: Given  n=20, mu=23,s=6.39 We want to find the P(Xbar>24.898)= ?

Q: The length of a fully grown hibiscus plant is normally distributed and has a mean 35cm. It is found…

A: Let X ne the length of  a fully grown hibiscus plant is normally distributed with mean 35 cm and…

Q: QUESTION 3 If a random sample of size 15 is drawn from a normally distributed population with mean…

A: Given : X follows t distribution.

Q: QUESTION 6 At QT Sugar factory the amounts which go into bag of sugar are supposed to be normally…

A: Given that,  Amount of sugar into bag (X) is normally distributed with mean μ=36 kg and standard…

Q: Question 4 (a) At a certain community college, the time that is required by candidates to complete…

A: We want to find the probability  A) P(56<x<60) Note: According to bartleby experts question…

Q: a. What is the probability that a laser fails before 6060 hours?  b. If 9 lasers are used in a…

A: The lifetime of a semiconductor laser at a constant gower is normally distributed with a mean of…

Q: QUESTION 9 Suppose that the average annual revenue of a small business is $150,000 with a standard…

A:

Q: The salaries at a corporation are normally distributed with an average salary of $19,000 and a…

A: The provided information are: Population mean (µ) = 19000 Population standard deviation (σ) = 4000…

Q: QUESTION 4 Suppose that a petrol station has its daily demand for petrol as normally distributed…

A: As per our guidelines we can answer only first question rest can be reposted.

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: QUESTION 10 Find P(11 < X < 15) if X is normally distributed with a mean of 14 and standard…

A: Given mean μ =14standard deviation σ =2

Q: college graduates is $25,450. Suppose that that distribution is normal and that the standard…

A:

Q: QUESTION 3 A certain type of engines lasts, on average, 4.0 years with a standard deviation of 0.5…

A: Obtain the Z-score of the random variable X equals 3.6. The Z-score of the random variable X…

Q: QUESTION 1 Ale insurance salesman sels on the average 3 life insurance policies per week. Use…

A:

Q: Question.9. From the following information, ascertain which project is more on the basis of standard…

A: The formula for finding Standard deviation is               S.D=∑(xi-x¯)2.p where,          x¯=∑xi n…

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 An investor has decided to form a portfolio by putting 3596 of his money into Google's…

A: The proportion of investments in the stocks, Google and Apple are:   The expected returns of the…

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 4 A sample of size 40 is taken from an infinite population whose mean and standard…

A: We have to find correct answer..

Q: QUESTION 17 The change in smell sensation attributed to COVID-19 by smoking status in a sample of…

A: We have given data on the change in smell sensation attributed to COVID-19 by smoking status in a…

Q: Question 07 The average number of years a person takes to complete a graduate degree program is 3.…

A: We want to find the following probability a) More than 4 years to complete the program   b) Less…

Q: Question# 7: A wall clock strikes the bell once at 1 o' clock, 2 times at 2 o' clock, 3 times at 3…

A: Since you have posted multiple questions, we will solve the first question for you. To get the…

Q: Question 7 The average monthly rainfall in Southern Ontario is 26 mm. If rainfall data over the year…

A:

Q: QUESTION 7 If 3% of all cars fail an emissions inspection, find the probability that 3 cars will…

A: Given,         X~Poisson λ=2.7         PX=x=e-λ λxx!; x⩾0

Q: QUESTION 19 A new electric car has batteries that can power the car for a certain amount of time. Of…

A: Given,mean(μ)=28standard deviation(σ)=10and the cars operation time is normally distributed

Q: QUESTION 23 If a random sample of size 15 is drawn from a normally distributed population with mean…

A: Given  mu=23, s=6.39 and n=12  We want to find P(Xbar&gt;25.905)= ?

Q: Question 16 The time it takes a student to finish this exam follows an exponential distribution with…

A:

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

A:

Q: Assume the number of physical damage losses for houses as a result of hurricane Irma in Barbuda is…

A: Given that  X~N( μ = 4000 , ? = 800 ) μ = 4000 , ? = 800 Z-score =(x-μ)/? Note: According to…

Q: QUESTION 39 Each salesperson in a large department store chain is rated on their sales ability and…

A: QUESTION 39 Here we have given the data table about the each sales person in a large department…

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 3 A certain type of engines lasts, on average, 4 years with a standard deviation of 1.4…

A:

Q: Question 8 If X is normally distributed with a mean of 30 and a standard deviation of 2, find P(30 <…

A: GivenMean(μ)=30standard deviation(σ)=2

Q: O None of the other answers O 0.3174 O 0.1587 O 0.8413 O 0.3413

A:

Q: QUESTION 18 Consider a binomial random variable where the number of trials is 12 and the probability…

A: We have to find mean and standard deviation for binomial experiment.

Q: QUESTION 2 The change in smell sensation attributed to COVID-19 by smoking status in a sample of…

A: Given number of extreme reduction=126+31=157 Number of smoker and extreme reduction =31 We want to…