4) a. A few mechanics on a Toyota showroom identified that they attend an average of (B + A) cars per week. Assume the standard deviation is A. A random sample of 26 weeks was chosen. Find the 90% confidence interval for mean. b. Estimate the 95% confidence interval for the standard deviation if a research of (A + 8) Chocolate brands shows that the number of A calories as standard deviation for these Chocolate brands. Assume the variable is normally distributed. Note that: A is first two-digit number (before English alphabet letter) from your college ID. B is last four-digit number (after English alphabet letter) from your college ID. For example, if your MEC ID is 16F23451, then A = 16 and B 3451 %3D

Q: Standardized tests: In a particular year, the mean score on the ACT test was 27.8 and the standard d...

A:

Q: Suppose that 2 balls are randomly selected from an urn containing 3 red, 4 blue, and 5 white balls. ...

A: Given: 3 red, 4 blue, and 5 white balls. Total = 12 balls  X- number of red balls Y- number of white...

Q: Suppose the mean cost across the country of a 30-day supply of a generic drug is $46.58, with standa...

A: Given,mean(μ)=$46.58standard deviation(σ)=$4.84sample size(n)=100

Q: A bakeshop owner determines the number of boxes of pandesal that are delivered each day. Find the me...

A: Hey there! Thank you for posting the question. Since there are multiple questions posted, we will an...

Q: A card is drawn from a deck of standard playing cards. What is the probability that the card is an a...

A: It is known that, Total number of cards in a deck = 52 Number of king cards = 4 Number of Ace cards ...

Q: 2. Those second prize winners missed the first prize by just one number. How much harder is it to wi...

A: Given information: First prize is awarded when all the five main numbers and Powerball matches. Seco...

Q: A bag contains 6 white, 4 red and 10 black balls. Two balls are drawn at random. Find the probabilit...

A:

Q: On a day in May, what is the probability that it is clear, given that you are in San Antonio? Explai...

A: The number of days clear in San Antonio is 6.

Q: A multiple choice test contains 25 questions, each with 4 answers. Assume a student just guesses on ...

A: Given that  Number of questions (n) = 25 Each question has 4 answer and one is correct answer  P(Cor...

Q: ASsume the random variable Xhas a binomial distribution with the given probability of obtaining a su...

A:

Q: find the aleof shaded fegioh. The yraph dePicts The Standid hommul distibutionwith mean o and Strand...

A: Required probability is P(-1.82<Z<1.82)

Q: Two construction contracts are to be randomly assigned to one or more of three firms: 1, II, and I11...

A:

Q: There are 14 people in your English class taking Chemistry, and 7 taking Chemistry and Physics. If y...

A: There are 14 people who are taking chemistry. And there are 7 people who are taking chemistry and ph...

Q: Marketing estimates that a new instrument for the analysis of soil samples will be very successful, ...

A:

Q: Based on an analysis of sample data, an article proposed the pdf f(x) = 0.45e-0.45(x - 1) when x 2 1...

A:

Q: We will draw randomly with replacement from a simplified 13 card deck with 4 face cards (A, J, Q K),...

A: Given The total number of cards =13 The number of Face cards =4 The number of non face cards =9 Jade...

Q: die is rolled. What is the probability of getting a. An even number or a 3? b. An odd number or a 4?...

A:

Q: individual chooses a number from 1 to 10. What is the probability that the number is even? Write you...

A:

Q: How many mobile phone numbers can be formed if the network code begin with 0 and 9 and the seven-dig...

A: here use concept of combination 

Q: die is tossed twice. Find the probability of getting a 3 or 4 on the first toss and a 1 or 2 on the ...

A:

Q: not equal, allowing the psychologists only to say that the three people are reporting different amou...

A: Kurtosis is a measure of whether the data are heavy-tailed or light-tailed relative to a normal dist...

Q: A study shows in a certain school that the average number of hours a student answers his/her module ...

A:

Q: You draw two cards from a standard deck of 52 cards, but before you draw the second card, you put th...

A:

Q: An accounting professor is notorious for being stingy in giving out good letter grades. In a large s...

A:

Q: Given the following information about events A, B, and C, determine which pairs of events, if any, a...

A: given,P(A)=0.58,  P(A|B)=0 P(B)=0.32,  P(C|B)=0.63 P(C)=0.63,     P(A|C)=0.58

Q: QUESTION 10 A survey among freshmen at a certain university revealed that the number of hours spent ...

A:

Q: 12. A bag contains 5 black and 7 white balls. A ball is drawn out of it and replaced in the båg. The...

A:

Q: 2. Aprobability mass function is given as f(x) =- for x = 0,1,2,3,. Find P(1.5 < X < 4.2)

A:

Q: Illustrative Example: Illustrative Examples: A. Parameter 1. The average income of employees of Sout...

A: A parameter is a number that describes a whole population e.g population mean, population proportion...

Q: I roll a regular six-sided die. What is the probability that the score is an even or prime number? 5...

A: A regular six-sided die is rolled. The sample space is, S=1, 2, 3, 4, 5, 6 Here even numbers are 2, ...

Q: The instructor takes a random sample of size from the population data and obtains the following samp...

A: We have given that,  The data set is,  405, 385, 495, 385, 555, 470 Then,  We will find the sample s...

Q: f X,Y(x,y) = 2I(0,y)(x) I(0,1)(y). Solve f

A:

Q: Suppose the time spent by a randomly selected student who uses a terminal connected to a local time-...

A: Given that :  Suppose the time spent by a randomly selected student who uses a terminal connected to...

Q: A company uses a 'selling aptitude test' in the selection of salesmen. Past experience has shown tha...

A: Let D and S denote the events classes, dissatisfactory and satisfactory, respectively. Let ℘ denotes...

Q: Suppose a box contains 3 red balls and 3 blue balls. You pick balls at random from the box, one at a...

A:

Q: What does the mean of a probability distribution tell us? How do you interpret the mean of a probabi...

A:

Q: Clarissa has just completed her second semester in college. She earned a grade of A in her 2​-hour t...

A: Given that,  Clarissa has just completed her second semester in college. She earned a grade of A in ...

Q: Using the following uniform density curve, answer the question. P(x) .125- 21) What is the probabili...

A:

Q: A bag contains 30 balls numbered from 1 to 30. One ball is drawn at random. Find the probability tha...

A: We have  A bag contains 30 balls numbered from 1 to 30 then the sample space (S) is,  S= {1, 2, 3, 4...

Q: Supply the missing blank with the correct answer. In how many ways can 7 cars be parked if there are...

A: As per our guidelines we are supposed to answer only one question per post so I am solving first que...

Q: 4. Five (5) green chips, two (2) red chips & three (3) blue chips. Find the following probabilities:...

A:

Q: Six candidates, Sophia, Mark, John, Jenny, Mike and Sky were nominated for Chairman position in an o...

A: Given information: Sophia 1 6 3 2 5 Mark 6 5 6 3 3 John 3 4 5 1 6 Jenny 5 2 4 4 4 Mike 2 ...

Q: QUESTION 8 X-U(-5,1) Find Xc so that Prob(X>Xc) =0.8 NOTE: WRITE YOUR ANSWER WITH 4 DECIMAL DIGITS. ...

A:

Q: A coin is flipped 6 times. Heads and tails are equally likely to occur. Show your work. a) How many...

A: Hi! Thank you for the question, as per the honor code, we are allowed to answer three sub-parts at a...

Q: Example 3.6. Let X and Y be jointly continuous random variables with joint PDF is given by: 3 fx.x(x...

A: The handwritten solution

Q: Model 1: Y, = a +B Xt + Et Model 2: Ý; = a +B X; (i) Explain the different between Model 1 and Model...

A: The solution for this question requires a basic understanding of fitting the Ordinary Least Square (...

Q: Assume that when an adult is randomly selected, the probability that they do not require vision corr...

A: Given that  n=14 , p=28%=0.28 , q=1-p=1-0.28=0.72 X~Binomial(n=14,p=0.28) X= Number they do not requ...

Q: that P(2) = P(4) = 20 P(5) = 51 %3D 10 4. Find the variance and standard deviation of the probabilit...

A:

Q: uppose Ari loses 40% of all thumb wars (a) What is the probability that Ari loses two thumb wars in ...

A: The probability that Ari losses thumb wars is 0.40.

Q: The sample space of a random experiment is {a, b, c, d,e, f}, and each outcome is equally likely. A ...

A: Given that  Sample space  S={a, b, c, d,e, f}, and each outcome is equally likely.  We have to find ...