Part 2 of 3 (b) What is the probability that the sample mean lifetime is less than 1540 hours? The probability that the sample mean lifetime is less than 1540 hours is Part: 2 / 3 Part 3 of 3 (c) What is the probability that the sample mean lifetime is between 1490 and 1550 hours? The probability that the sample mean lifetime is between 1490 and 1550 hours is

Q: Weights

A: Normal probability plot is one of the technique to assess whether the data follows normal…

Q: The lengths of lumber a machine cuts are normally distributed with a mean of 100 inches and a…

A: GivenMean(μ)=100standard deviation(σ)=0.5

Q: 33% of the Population has 20/20 vision if 70 individuals are selected at random from the Population…

A: Sample size : n = 70P(20/20 vision) : p = 0.33x = Number of people with 20/250 visionMean of X :  =…

Q: Scenario: A researcher gathers information on retirement age to see if it is different than 65…

A: given data, claim: μ≠65n=34X¯=64.8S=10

Q: How many standard deviations away from the mean is a CD player that lasts 8 years? What is the…

A: Given Information: Mean μ=7.1 Standard deviation σ=1.4

Q: Explain how the probability of extinction and the mean population size of a species after a…

A: the Colonization and extinction probabilities  were defined in terms of the habitat state at both…

Q: The manufacturer of the XJ35 battery claims the mean life of the battery is 500 days with a standard…

A:

Q: Tiger Woods hits an average driver 287.2 yards with a standard deviation of 24.6 yards. What is the…

A: The probability value is calculate by means of standard normal variate with the random variable,…

Q: We are interested in the mean migration distance of Canadian geese. Suppose that we know that the…

A: Sample size n =25 Population mean μ =2500 Population standard deviation =250

Q: What does standard deviation measure in a probability distribution

A: In simple words, Standard deviation measures the variability of all possible outcomes of a…

Q: What is the mean of the sample distribution? What is the R code to find the probability that this…

A: The population mean: μ=2500 Standard deviation: σ=250 Sample Size: n=25

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: Salaries for teachers in a particular elementary school district are normally distributed with a…

A: (f) The 90th percentile for an individual teacher’s salary is obtained below as follows: Use EXCEL…

Q: Ava's morning routine is normally distributed and independent. She has been tracking her time from…

A: Let X and Y are the first and second mornings. It is given that X and Y are independent and…

Q: 3. Without using the table, find the probability of 3 successes among 5 trials if success…

A: Given,n=5p=0.09A random variable X~Binomial (n=5 , p=0.09)P(X=x)=5x 0.09x 1-0.095-x   ;  x=0,1,...5

Q: (d) A bag that contains 1425 chocolate chips is in the (Round to the nearest integer as needed.) st…

A: Given: μ = 1252 σ = 129 Formula Used: Z = X-μσ

Q: 3.10 Heights of 10 year olds: Heights of 10 year olds, regardless of gender, closely follow a normal…

A: Given that.   X~N( μ , ?^2 )   μ=55    , ?=5   , n=10   Z-score =( x - μ )/?   NOTE:- According to…

Q: The time taken to complete a mathematics test is normally distributed, with an average time (u) of…

A: We have that Population mean =35 Population standard deviation =8.5

Q: bility of getting be

A: mean = 9  standard deviation = 2.5 to find P(X<8)

Q: Find the test statistic for this hypothesis test. | (Round to two decimal places as needed.)

A:

Q: LA weather, Part I. The average daily high temperature in June in LA is 77°F with a standard…

A: Given Information:Mean, μ=77∘FStandard Deviation, σ=5∘F

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

A: Given,n=50p=0.05A random variable X~Binomial(n=50 . p=0.05)P(X=x)=50x0.05x1-0.0550-x   ;…

Q: height of 80.1 inches and standard deviation of 2.97 inches. Round your answers to four places after…

A:

Q: Find the probability that, when playing 100 games, the player will win more than $5 on average.…

A: The following information has been provided: μ=4, σ=0.583\mu = 4, \text{ } \sigma = 0.583

Q: ) What are the chances that the investment will result in a negative return? ii) What is the…

A: mean = 15 sd = 10

Q: Wonka Chocolatiers produce a reduced-sugar chocolate bunny for health-conscious consumers.  Willy,…

A: Mean μ=2.9 Standard deviation σ=0.4 Sample size n=4

Q: n HP laser printer is advertised to print text documents at a speed of 18 ppm (pages per minute).…

A: actual mean = 17.2ppm  standard deviation = 3.25ppm sample size = 12 The printing speed is actually…

Q: Erla rolls six sided dice 15 times. What is the standard deviation of the number of sixes that…

A: Let p be the probability of six  p=1/6, n=15 Let X be the number of sixes in rolling of dice  Then…

Q: The mattress company Amerisleep recently conducted a survey and concluded that more than half of all…

A:

Q: Q2) A researcher wants to know if the mean times (in minutes) that people watch their favourite news…

A: Given the data as TV Channel 1 TV Channel 2 TV Channel 3 45 15 72 12 43 37 18 68 56 38 50…

Q: Section 5.4 (please help with TI-84 calculator if possible) The lengths of lumber a machine cuts…

A:

Q: Suppose that blood chloride concentration (mmol/L) has a normal distribution with mean 104 and…

A: Given that: Population mean, μ=104 Population standard deviation, σ=5

Q: The number of chocolate chips in an 18-ounce bag of chocolate chip cookies is approximately normally…

A:

Q: What is the probability of recording exactly 3 deaths on the next day?

A: here given,  daily mean number of COVID 19 deaths in Metro Manila is 2

Q: A bank has kept records of the checking balances of its customers and determined that the average…

A: We have given that Mean(µ) = 300Standard deviations (σ) = 48 Here we have n = 144

Q: Describe the best probability sampling scheme with example, suitable for the situation  when values…

A: Sampling Distribution :- The number of possible samples of size n that can be drawn from a finite…