The first four moments of a distribution about the value 5 of the variables are 2, 20, 40 and 50. Calculate the mean, variance, B, and B2 and comment upon the nature of distribution.

Q: For the given pair of events, classify the two events as independent or dependent. Having an excelle...

A: Here the first one is having an excellent driving record and getting a good rate on auto insurance.

Q: According to the Centers of Disease Control, about 22% of American young people between the ages of ...

A: Givenabout 22% of the american young people between the ages of 12 and19 are obeseclaim is that the ...

Q: A company produces steel rods. The lengths of the steel rods are normally distributed with a mean of...

A:

Q: Giving a test to a group of students, the grades and gender are summarized below   A B C Total Mal...

A: Given that  Contingency table    A B C Total Male 14 11 17 42 Female 8 4 15 27 Total 22 15 ...

Q: The speeds of cars traveling on UK motorways are normally distributed with mean 96 kilometers per ho...

A: We have given that.   X~N( μ , ?^2 )   μ =96 , ? = 10   Z-score =( x - μ )/?

Q: A sample of eight repair records for a certain fiber-optic component was drawn, and the cost of each...

A: It is needed to obtain the 98% confidence interval for mean repair cost.

Q: 5. Let Z ~ N(0, 1). Find z such that P(-z < Z < z) = 0.85

A: Given that  Z~Normal(0,1) Z follows standard normal distribution with mean zero and variance one  P(...

Q: By rewriting the formula for the Multiplication Rule, you can write a formula for finding P(A and B)...

A:

Q: ests in a university's statistics classes have scores with a standard deviation equal to 14.1. One o...

A: The sample size n is 27.

Q: If n=15, z(x-bar)-D41, and s=2, find the margin of error at a 80% confidence level Give your answer ...

A:

Q: tem Expenditure ( Food 240 4. The adjoining table gives the break-up of Clothing the expenditiure of...

A:

Q: Cotinine levels were measured in a group of smokers (n = 31, x = 172.48 ng/mL, s = 119.50 ng/mL) and...

A:

Q: A high school football coach is trying to decide which quarterback he should start in next week's ga...

A:

Q: The following data relate to the sales, in a time of trade depression of a certain article in wide d...

A: a=140 b=60 a+b=200 c=40 d=60 c+d=100 a+c=180 b+d=120 N=300

Q: If P(A) = - determine the odds against event.1 occurring. %3D

A: Given that The probability of event A is  P(A) = 2/11 Note : Since you have asked multiple questions...

Q: An article in Obesity Research ("Impaired Pressure Natriuresis in Obese Youths" (2003, Vol. 11, pp. ...

A: Given,sample size(n)=14mean(μ)=118.3standard deviation(S)=9.9degrees of freedom(df)=n-1df=14-1=13α=1...

Q: A nation-wide mail order house desires to verify the accuracy of its clerical work in completing inv...

A:

Q: The probability that an event will not happen is P (E') =0.96. Find the probability that the event w...

A: Given information- We have given the probability that an event will not happen is P(E') = 0.96 We ha...

Q: Exercise 1: Assume that IQ scores are normally distributed with a mean of (120+m) and a standard dev...

A:

Q: 7. Find the class intervals if the arithmetic mean of the following distrihution is 33 and smed mean...

A:

Q: 50. Σ(Χ - 1)2 = 1) 2

A: Given : data value in table  X: 0,3,5,7  Y: -2,3,0,1  Then to find sum(x-1)^2 ??

Q: Pbtain the probability distribution of X, the mumber of heads in three tosses of a coin (or a simult...

A: Given that  Total possible number of outcomes = 23 = 8 The sample space, S = {HHH, HHT, HTH, HTT, TH...

Q: Pbtain the probability distribution of X, the mumber of heads in three tosses of a coi. (or a simult...

A: Sample space=S S = {HHH, HHT, HTH, HTT, THH, THT, TTH, TTT}

Q: A format for back-to-back stemplots representing the pulse rate of females and males from the given ...

A: males and females pulse rate has been given, Stemplot has to be drawn.

Q: 1. If P(A) =- determine the odds against event.1 occurring. %3D

A: Here All 4 parts Are Calculated in different parts

Q: A student's research shows that there were more accidents in 2015 than there were in 1915. He conclu...

A: D.Compare the accident rates(percentages) for 1915 and 2015

Q: Suppose that two cards are randomly selected from a standard 52-card deck. (a) What is the probabili...

A: Given that  Two cards are drawn from standard deck of 52 cards. Total number of cards (n) = 52 Numbe...

Q: Use Table, to draw a random sample (without replacement) of size 5 from a population of 24 units.

A:

Q: Problem 4 An urn consists of 30 red balls and 70 green balls. What is the probability of getting exa...

A: Given Total red balls = 30 Total green balls = 70 Sample size = 20 Sampling done without replacement...

Q: e) Solve the equation 4z-4 = 320 , showing ALL workings. Answer:

A: Given that  4 x4 - 4 = 320 Find the value of 'x'

Q: How many way are there to arrange the letters in the word BALLOON? Show your work clearly. Your answ...

A: Given that  The given word BALLOON Repeated letters = O and L Number of letters  = 7 Repeated letter...

Q: Identify the sample space of the probability experiment and determine the number of outcomes in the ...

A: We have given that,  The sample space of the probability experiment and determine the number of outc...

Q: Find the sample variance and standard deviation. 4, 45, 14, 48, 32, 24, 34, 32, 31, 31 D Choose the ...

A: Given that  The data are 4,45,14,48,32,24,34,32,31,31  

Q: (a) How many ways are there for a class of six kids to line up for recess? (b) The first child and l...

A: Here use basic probability rule Here total 6 kids  And they are line up for recess

Q: b) The following table shows the time students from a college took to complete a marathon. Time (min...

A:

Q: a) The following data shows how many employees showed up to work every day for two weeks 12 18 09 16...

A: Given data is 12,18,09,16,11,10,08,10,13,11,15,17,16,11

Q: At a gas station, 40% of the customers use regular gas, 35% use mid-grade gas, and 25% use premium g...

A:

Q: The amount of detergent in a box of a particular detergent has a uniform distribution with c=24 and ...

A: Given that  X ~ Uniform( a = 25.9 , b = 26.2 ) c = 24, d = 28

Q: Aptitude Tests Twenty-eight applicants interested in working in community services took an examinati...

A: We have given that  Stem and leaf plot.  First convert into data set then find sample standard devia...

Q: Construct a box plot for the given data.  Include values of the 5-number summary in all box plots. ...

A: Given data is,32 , 37, 41, 44, 46, 48, 53, 5557, 57, 59, 63, 65, 66, 68, 6970, 71, 74, 74, 75, 77, 7...

Q: After each spin, you advance the number of spaces indicated. (a) What is the expected number of spac...

A: A spinner is given where the number of spaces are placed in pie sections as: Number 4 Covers 90 degr...

Q: We have four numbers 1, 2, 3 and 4. Two numbers are randomly selected (without replacement) from the...

A: 3. From the given information, there are four numbers 1, 2, 3, 4.  Two numbers are randomly selected...

Q: 100(1 a)% confidence interval for the mean u of a normal population when the value of ở is known is ...

A: Solution: Given information: n= 20 Sample size  x = 4.85 Sample mean σ=0.79 Population standard devi...

Q: A market has both an express checkout line and a super express checkout line. Let X1 denote the numb...

A:

Q: A random sample of size 20 from a normal population gives the sample standard deviatior of 6. Test t...

A: The null and alternative hypotheses are: H0:σ=9 H1:σ≠9

Q: height in the male population is normally distributed with a mean height of 5–11 (71 in.) and a stan...

A: Here is given that mean is 71 inches and standard deviation is 4 inches. 6 ft is equal to 72 inches.

Q: For which of the x-values should you NOT attempt to estimate the y because of extrapolation? 20 60 8...

A: Given Information: From the given graph, the data points are, 9,1,41,3,55,4,69,5,75,5,83,6

Q: U= {all natural numbers up to 8} , with the following subsets A= {1,3,5,7} B = {2,3,5,7} c= {2,4,6,8...

A: ∪ = { all natural number upto 8} A = { 1,3,5,7} B = { 2,3,5,7} C = { 2,4,6,8}  

Q: In 1980, only 10% of the students in the city school district were classified as being learning disa...

A:

Q: What value of the x axis marks the top 25% of the distribution?

A: Given:  Let x be a normally distributed random variable with the following parameter: mu=125 standar...