variance

Q: Let x be a ramdom variable that represents the length, in inches, of a picture frame. Then x has a n...

A: We have to find given probability. 

Q: Suppose that the number of classes and the class width of a certain distribution is 8 and 3.5, respe...

A: Given,number of classes=8 class width=3.5largest data value=35

Q: A dice A has four red faces and two white faces. A dice B, vice-versa, has two aces and four white f...

A: As per Bartleby guideline for more than one question asked only first is to be answered please uploa...

Q: The table below gives a discrete probability distribution x Pr(X=x) 1 0.1883 4 0.1618 7 0.1...

A: Table that shows the necessory calculations is: X p(X)p(X) X \cdot p(X)X⋅p(X) X^2 \cdot p(X)X2⋅p(...

Q: Probability Question

A:

Q: It's all about PERMUTATION - How many distinguishable permutations are possible with all the letters...

A: The word given is ELLIPSES and it consists of 8 letters . The letter L is repeated 2 times , E is re...

Q: In a certain school, 40%of graduating students choose engineering courses, 35%choose medical courses...

A: Given Information: Total percent of students in the school = 100% Probability of students chooses en...

Q: A coin is weighted so that the probability of obtaining a head in a single toss is 0.4. If the coin ...

A: A coin is weighted so that the probability of obtaining a head in a single toss is 0.4. If the coin ...

Q: 7. The value set for a is known as: A. the rejection level B. the acceptance level 2sw 2inabute sgal...

A: Alpha is a threshold value used to judge whether a test statistic is statistically significant.  It ...

Q: you have 20 jelly beans in a jar: 2 yellow, 3 blue, 4 green, 5 red, 6 orange jelly beans (a) if you ...

A: Given: 20 jelly beans in a jar: 2 yellow, 3 blue, 4 green, 5 red, 6 orange  Without Replacement we c...

Q: Wattage Good Defective Total A quality control inspector is checking a sample of light bulbs. The ta...

A: As per given by the question, a quality control inspector is checking a sample of light bulbs. the t...

Q: Directions: Compute the following permutations. Write your answer with complete solutions in your 1 ...

A: We have to find the number of permutations of 9 objects taken 3 at a time. Here, n=9, r=3 Using the ...

Q: The game of craps is played with two dice. The player rolls both dice and wins immediately if the ou...

A: As per given by the question, the game of craps with played with two dice. if the sum is 7 or 11this...

Q: If a variable X follows Poisson distribution with P() 1) = P(X = 2). Then, find P(X = 3) %3D %3D %3D...

A: The formula of poison distribution is:P(x)=e-λ×λxx! We are given that P(x=1)=P(x=2). Thus, equate bo...

Q: 10. A two-tailed test is one where: A A. results in only one direction can lead to rejection of the ...

A: A two tailed test means that if a two tailed test is conducted with 0.05 level of significance then ...

Q: On the past math summative exam, the bottom 20% of students failed to pass the test. The mean for th...

A: From the given information, it is clear that, Mean μ=55 Standard deviation σ=11  

Q: Answer all items:   Consider the experiment of tossing a coin four times. The outcome is a sequence ...

A: Note- As per bartleby's guideline the first 3 subparts of this question will be answered. Please pos...

Q: Answer this please, explain and justify the answer

A: The probability of engine failure is 0.008. The probability of human error is 0.001. The probability...

Q: Find the probability that Joe is early tomorrow. Given that Joe was early, what is the conditional p...

A: Define some events A: it will rain B: it will not rain E: Joe is early to work.  

Q: The probability that a certain product is defective is 0.35. Find the probability that exactly 3 of ...

A: This is a question of Bernoulli Experiment as- The experiment is repeated a fixed number of times i...

Q: It's all about PERMUTATION - Find the number of distinguishable permutations of the digits of the nu...

A: Given number is 348838. Total digits in a number=6 8 occurs 3 times and 3 occurs 2 times. We have to...

Q: Which of the following is a characteristic of the sampling distribution of a mean or proportion?  a)...

A: The sampling distribution of a statistic is known as the probability distribution of all the possibl...

Q: Answer this please

A: The younger child of passenger B is girl. Al least one child of passenger A is boy.

Q: Two cards are randomly selected from a deckof 52 playing cards. (a) What is the probability they con...

A: there are 52 card and  2 card are randomly selected  

Q: X and Y are independent, X ~U(0,1) and Y~U(0,1). Calculate the probability P(X+Y<1.5).

A: X ~U(0,1) , and Y ~U(0,1) , independently.  Then the joint distribution of X and Y, also follows, U(...

Q: 1. Let X be a random variable with u = 79 and o = 7. The distribution is normal and the sample size ...

A: The mean of the data is 79. The standard deviation of the data is 7

Q: an observer counts 36O vehicles per hour at a highway. estimate the probability of having more than ...

A: A observer count 360 vehicle per hour at a highway.

Q: Bill and George go target shooting together. Both shoot at a target at the 7- same time. Suppose Bil...

A: Define event B as Bill hit the target. Define event G as George hit the target. Given: P(B)=0.7P(G)=...

Q: The probability mass function of a random variable X is given by p(i) = cx'/i!, i = 0,1,2... where à...

A: Given : p(i)=cλii!                   i=0,1,2,......... Where λ&gt;0.

Q: Find the expected value for the random variable x havng the probability function shown in the graph ...

A: Solution: The probability distribution of random variable X from graph is  x 8 16 24 32 40 Total ...

Q: The city of Alameda is surveying residents to learn the proportion of smartphone users. They know th...

A: Form the provided data we have, n = 100 + 120 + 87 + 54 + 67 = 428  x= 71 + 90 + 87 + 69 + 65 = 382 ...

Q: A box of 10 flashbulbs contains 3 defective bulbs. A random sample of 2 is selected and tested. Let ...

A: The probability mass function of hyper -geometric distribution is,  Here N is the population size a...

Q: The mean grade of Adrian in the final examination in mathematics was 85 and the standard deviation w...

A: 1) Given that: Mean for mathematics = 85 Standard Deviation for mathematics = 7 Mean for science = 8...

Q: A contest at a fast-food restaurant offered the cash prizes and probabilities of winning on one visi...

A: Cost of the ticket is $1.

Q: Sandra plays a matching game. In order to advance to the next level, she must score at least 10 poin...

A: Given is that Sandra must score atleast 10 points to advance to next level  for correct matches Sand...

Q: In a fishing contest, the length of the fish caught ranging from 11.5 inches to 23 inches with a mea...

A: From the given information, the mean length is 16.40 inches and standard deviation is 4.71 inches. T...

Q: If a random variable that is normally distributed has a mean of 25 and a standard deviation of 3, co...

A: Given,mean(μ)=25standard deviation(σ)=3

Q: How many solutions are there to the equation: x1 + x2 + x3 = 19 where1. x1, x2, x3 are all non-negat...

A: As per Bartleby guideline for more than one question asked only first is to be answered please uploa...

Q: There are two sets of balls numbered one through 16 placed in a bowl if two balls are randomly chose...

A: Given Data: The number of balls in one set is: t=16 The number of sets in the bowl is: r=2 The total...

Q: Answer all items: What percent of a standard normal distribution N(µ = 0;σ = 1) is found in each re...

A: we have to find probability using z table.     

Q: Direction: Analyze and solve the following problems.In how many ways can 3 rhinestones, 5 crystals, ...

A: It is given to find the number of ways can 3 rhinestones, 5 crystals, and 2 precious metals be arran...

Q: What are the expected number of yearly breakdowns for the power generator at Orlando Utilities that ...

A: The number of breakdown in 20 years are Number of breakdown 0 1 2 3 4 5 6 Number of years 2 2 ...

Q: It is known that 60% of mice inoculated with a serum are protected from a certaindisease. If 15 from...

A:

Q: Hi. Good day. I need answers for items 7,8, and 9 with explanations. Thank you.

A: Since you have submitted three questions, we'll answer the first question. For the other questions p...

Q: Consider a spinner with six equal sectors, labelled sequentially by every one of the numbers from th...

A: As per Bartleby guideline for more than one question asked only first is to be answered and please u...

Q: Please do question number 2

A:

Q: Given the function, x²0<x<l f(x)%3D{1 1 1<x< 3 otherwise 0. (a) Show that fis a probability density ...

A:

Q: For the events E and F, we are given the following probability, P(E)=0.50, P(F) =0.60, P(E and F) =0...

A: Given: PE=0.50 PF=0.60 PE and F=0.30 Two events are said to be independent if the occurrence of one ...

Q: Given n=36, x = 786, o= 48, µ= 800 to test the hypothesis that 800 against the test statistic used? ...

A: Given: Sample size n=36 Sample mean x¯=786 Population standard deviation σ=48 Population mean μ=800 ...

Q: if the probability that a bowler will bowl a strike is 0.7, what is the probability that he will get...

A: Given that, Probability that a bowler will bowl a strike (or probability of success) is p=0.7 Number...