An electrical firm manufactures light bulbs that have a length of life that is normally distributed with mean equal to 787 hours and a standard deviation of 41 hours. Find the probability that a bulb burns between 769 and 806 hours. 0.3228 0.33 0.6772 0.3473

Q: Consider the variables ? and ?. The realization of a sample of size 20 is given below (where ? is th...

A: Data:  X Y -1.202 563.024 2.112 291.072 2.827 -893.619 -0.314 1321.814 -1.477 -91.573 -6.516 446.336...

Q: llustration 13.26 Calculate the cost of living index. Item Quanțity used in given year Po Pa 1. Rice...

A:

Q: Compute the probability of drawing two clubs from a standard deck of 52 cards. Round your answer to...

A: GivenTotal no. of cards = 52Total no.of face cards in deck = 12    (i.e., J,Q,K)

Q: Suppose portfolio mean return is 25% and standard deviation 30%. Find the 2 standard deviation range...

A: Given: Portfolio return= 25% Standard deviation= 30%  

Q: By using the average of the quantities of two years as weights, compute a price index. Commodity Qua...

A:

Q: The following data are given to an economist for the purpose of economic analysis. The data refers t...

A: Solution-: Form given information we get, n=100,∑f*d=50,∑f*d2=1970,∑f*d3=2948,  f*d4=86752,d=X-48 We...

Q: 1. Let X denote the time in hours needed to locate and correct a problem in the software that govern...

A:

Q: 12. Does the extent to which college graduates want to change the world differ by type of major? To ...

A: From the problem, researcher aim is  Aim : Whether the college graduates' desire to change the world...

Q: The following data are given to an economist for the purpose of economic analysis. The data refers t...

A:     We have to find whether the distribution is platykurtic or not : 

Q: II. Solve the mean (ue), variance (o), and standard deviation (a), of the given. Show your solution....

A: Note: Hi, thank you for the question. As per our company guideline we are supposed to answer only fi...

Q: Suppose portfolio mean return is 25% and standard deviation 30%. Find the 2 standard deviation range...

A:

Q: Which is the best investment company to invest in: Investment Company A Possible Return Probability ...

A: It is known that, Mean= ΣXi*p(Xi) For company A we calculate expected possible return, x̄=(55*0.5+45...

Q: Find the critical value(s) and rejection region(s) for the type of z-test with level of significance...

A:

Q: 2. The average pre-school cost for tuition fees last year was P17,250. The following year, 20 instit...

A: 2. Given that, the average pre-school cost for tuition fees last year was P17,250. The following yea...

Q: ALPHA 0.001 Candy Company...

A: Given that,   Candy Company       A B C Brown 16 21 55 Yellow 139 128 247 Red 327 349 18...

Q: Suppose that the sampling distribution of size 10 has a mean of 30 and standard deviation of 3. Calc...

A: As we know standard deviation of sampling distribution = σ/(n)1/2

Q: Compute coefficient of quartile deviation from the following data : Marks 10 20 30 40 50 60 No. of S...

A: Given : Marks No. of students 10 4 20 7 30 15 40 8 50 7 60 2

Q: Find the mean and standard deviation of the following observations : X:1, 2, 4, 6, 8, 9 Transform th...

A:

Q: A particular professor never dismisses class early. Let x denote the amount of time past the class e...

A: Given that x~u(0,10) f(x)=1/10 put the given probabilities in order from smallest to largest

Q: You want to obtain a sample to estimate how much parents spend on their kids birthday parties. Based...

A:

Q: Standard automobile license plates in a country display 2 numbers, followed by 3 letters, followed b...

A: Given: Standard automobile license plates in a country display 2 numbers followed by 3  letters foll...

Q: An experiment consists of choosing a subset from a fixed number of objects where the arrangement/ord...

A: If the number of objects where the arrangement or order is not important then will use there combina...

Q: Two ladies were asked to rank 10 different types of lipsticks. The ranks given by them are as follow...

A:

Q: II. Solving. Show your solution. 9-10. IQ scores are normally distributed with a mean of 135 and a s...

A: Given,mean(μ)=135standard deviation(σ)=15

Q: The following data represent the concentration of dissolved organic carbon​ (mg/L) collected from 20...

A:

Q: Suppose that a new treatment is successful in curing a common alment 63% of the time. If the treatme...

A: It is given that n=100 and p=0.63.

Q: identify 1.The research hypothesis H1 2.The null hypothesis H0 3.The rejection region of the null hy...

A: here given researcher believe that less than 45%  of motorists in his country do not check their cel...

Q: You interview 100 college sophomores , and you ask how much they earned the previous summer. You dec...

A: We have given that the 100 sophomores. Here we need to use the median to describe the centre of the ...

Q: Consider the following time series data. 2 34 5 1 7 12 8. 13 16 (a) Construct a time series plot. Wh...

A: Solution-: Given data: (a) Construct a time series plot. What type of pattern exists in the data? (b...

Q: Consider the Venn diagram shown below. A B 4 5 12 3 |11 8 C 1

A:

Q: A doctor is interested in determining whether a film about exercise will change 10 persons’ attitude...

A: The objective is to calculate absolute value of t 

Q: In a business, the Chief Executive Officer wants to know if his workers are for or against mandatory...

A: As per the Bartleby guildlines we have to solve first three subparts and rest can be reposted... Giv...

Q: Exactly 50% of the area under the normal curve lies to the right of the mean. True O False

A: Given : Exactly 50% of the area under the normal curve lies to the right of the mean.  

Q: A study on the time spent weekly on online games of sample students and their final exam scores. The...

A: Note: According to Bartleby expert guidelines, we can answer only first question with their three su...

Q: 5.5 7.2 7.3 6.3 8.1 6.8 7.0 7.0 6.8 6.5 7.0 6.3 7.9 9.0 8.6 8.7 7.8 9.7 7.4 7.7 9.7 8.0 7.7 11.6 11....

A: Given: X Y 5.5 6.3 7.2 5.8 7.3 7.8 6.3 7.1 8.1 7.2 6.8 9.2 7 6.6 7 8.3 6.8 7 ...

Q: The table below gives U.S. lead emissions, L, into the environment in millions of metric tons for 19...

A: Introduction: The predictor variable is t, the number of years since 1970, that is, t = Year – 1970....

Q: A local manufacturer will qualify a new machine if the percentage of its serviced product does not e...

A: Given that : Po = 2 %  Sample size (n) = 250  No. Of defective products (x) = 6 Level of significanc...

Q: Suppose the confidence interval (0.6358, 0.7532) represents the proportion of Skyline College studen...

A: From the provided information, The confidence interval is (0.6358, 0.7532).

Q: Spuds-R-Us makes potato chips. A typical size is the 16-ounce bag of chips. A paid sampler went to v...

A: Given : Claim : Average weight of bags is 16-ounces Sample size (n) = 76 Sample Mean (X¯) = 15.85 Sa...

Q: For items 8-15, suppose four students are selected at random from the gathered date. Let C be the ra...

A: 8) total sample points generated will be 24= 16 9) The values of the random variable C is 0,1,2,3,4

Q: Ten percent of Americans are allergic to ragweed. Suppose a random sample of 200 people is selected....

A:

Q: Suppose now that instead of using a new detection tool starting in week 3, suppose we started using ...

A: Given The new detection tool is used from week 1.The probability that a fake $20 bill is detected =x...

Q: llustration 13.21. From the chain base index no. given below, preparë fixed base index no. 1971 110 ...

A:

Q: Q8. A Random Variable X has an unknown distribution, a known mean of 10 and an unknown variance, o. ...

A: From the given information we find the solution.

Q: A poker hand, consisting of 5 cards, is dealt from a standard deck of 52 cards Find the probability ...

A: 23) The number of cards in a deck of cards is 52.

Q: Find the winner using the pairwise method and determine if the winner is also the Condorcet winner. ...

A: According to the policy , we can provide you the answer of first four questions.

Q: Q. 20. Find out mode from the following : Values X : 10 12 15 20 25 30 35 Frequency : 7 8 10 15 11 7...

A:

Q: Two dice are thrown simultaneously.Find the probability that the number of spots upper host is 9 or ...

A: When two dice are thrown, there are 6*6 = 36 outcomes.    

Q: The probability density function of the net weight in pounds of a packaged chemical herbicide is f(x...

A: Givenf(x)=2.0      49.75<x<50.25

Q: 2. Determine the area under the standard normal curve that lies. Show the area in the normal curve b...

A: In question, We'll find the area under the standard normal curve for different values of z. The solu...