3) 62% of kids are bummed that winter break is over. What would be the standard deviation of the number of kids we would need to survey to find one who is bummed that winter break is over?

Q: 2. Construct a 95% confidence interval for the standard deviation of math scores of students maj in…

A: Given Data for constructing the Confidence interval : Sample variance = s2 = 572 = 3249 We need to…

Q: 4. A researcher knows that the average height of Filipino women is 1.53 m. A random sample of 26…

A: For the given data Perform t test for one sample mean

Q: our sample consists of 43 subjects, with a mean of 36.1 nd standard deviation of 2.56.

A: Given information: μ=36.82n=43x¯=36.1s=2.56

Q: 4) Without using the 10th students data and according to your opinion (do not make any calculations)…

A: Introduction :-  We are given the data of students, X as there mid-term result and Y as Final exam…

Q: A car insurance company tells its prospective customers that they can save an average of at least…

A:

Q: The average expenses of the Dela Cruz Family is ₱12,600 every half of a month with a standard…

A: Given data,μ=12600σ=1570P(X<11000)=?

Q: Consider a gamble with a 40% chance of winning $10 and a 60% chance of losing $10. What is the…

A: Given data: The given chance of winning is P(W)=40%=0.40. The given chance of losing is…

Q: 6. A research article reported that for a random sample of 850 meal purchases made at fast food…

A: We have to perform left tailed test for the difference in means and since sample size is large…

Q: True or False: If the amount of gasoline purchased per car at a large service station has a…

A: It is given that the mean and standard deviation are 15 and 4, respectively.

Q: 8. A sociologist focusing on popular culture and media believes that the average number of hours per…

A: Given : Mean : d = X1 - X2    = 1 σ1 = 2.3σ2 = 2.5 σd = σ12n1+σ22n2     = 2.3250+2.5250= 0.2308=…

Q: 1. Statewide, social workers average 10.2 years of experience. In a random sample, 203 social…

A:

Q: Suppose the country club bills based on a sample of 4 members are: 410, 1,089, 637, 961. What is the…

A: Given information- We have given the country club bills based on a sample of 4 members. 410, 1,089,…

Q: Nationally, patients who go to the emergency room wait an average of 5 hours to be admitted into the…

A: Given: μ0=5 hours.n=11x¯=2.7 hours s=2.9 hoursα=0.05

Q: According to the study, the average number of hours that the student spent studying per week in the…

A: From the provided information, Mean (µ) = 56 hours Standard deviation (σ) = 14 hours X~N (56, 14)

Q: 7 of 14 Chihuahuas have a mean weight of 5.2 pounds, with a standard deviation of 1.2 pounds. German…

A:

Q: Since a population has a mean of 73.5 and a standard deviation of 2.5, what is the probability that…

A: We have to find given probability.....

Q: (5) Based on the mean and standard deviation, which of the scores are extremely high or extremely…

A: The z-score of the given data values tells how far raw data is from the mean in terms of the…

Q: 3. The sample mean weight of 65 adult African elephants was measured to be 14,325.62 pounds, with a…

A:

Q: A web site reported in 2018 that 47% of all web traffic comes from laptops and desktops. Based on a…

A:

Q: Suppose math scores on the SAT are normally distributed with a mean of 500 and a standard deviation…

A:

Q: The ages of a sample of Canadian tourists flying from Toronto to Hong Kong were 32, 21, 60, 47, 54,…

A: Given that,32 21 60 47 54 17 72 55 33 41

Q: Based on annual driving of 14,000 miles and fuel efficiency of 20 mpg, a car in the United States…

A: Solution: Let X be the number of gallons per year. From the given information, X follows normal…

Q: What is the standard deviation of the number of burglarized houses? What is the probability that…

A: Given : The probability that a house in an unban area will be burglarized is 5% . A sample of 50…

Q: 2. A maintenance supervisor is comparing the standard version of an instructional booklet with one…

A:

Q: 3. A certain brand of tissues has 60 tissues in a standard box because the manufacturers believe…

A: According our policy we can answer only first part for remaining please repost the question.

Q: In a study to compare the effectiveness of distance learning with traditional classroom instruction,…

A:

Q: 4. The average public elementary school has 468 students with a standard deviation of 87. If a…

A: Here use given step by step solution and normal distribution of sample mean

Q: Find the Mean and Standard Deviation for the prompts below: 4.)  Texas Instruments claims that 3%…

A: Given: n=3000 and p=0.03.   Then, the mean isEX=np=30000.03=90

Q: 2. The number of hours spent playing video games a week by the residents of Minneapolis has a mean…

A: Answer -  Given mean μ = 10 hours   and Standard deviation σ = 13 hours                  Sample size…

Q: 4 An LED lightbulb manufacturer produces lights with a mean lifespan of 10,000 hours and a standard…

A: Given information- Population mean µ = 10,000 hours Population standard deviation, σ = 1,000 hours…

Q: 4. A cigarette manufacturer claims that its brand of cigarette contains on the average 5mg of tar…

A:

Q: director

A:

Q: According to police sources, a car with a certain protection system will be recovered 90% of the…

A: Given problem is a binomial distribution with:

Q: 8) A local supermarket spent $250,000 remodeling. Prior to remodeling, the average daily receipts…

A:

Q: The owner of a small convenience store is trying to decide whether to discontinue selling magazines.…

A: From the provided information, 5% of the customers buy magazines and thinks that he might be able to…

Q: 2. The average number of pages in a novel is 326 with a standard deviation of 24 pages. If a sample…

A: For a random variable X, with mean μ and standard deviation σ , the average of X =1n∑xii=1n =X¯…

Q: VII. The NYC MTA claims the average wait time for an F train after midnight is less than 21 minutes.…

A: Given, μ = 21n = 15X¯ = 24S = 9     Test the claim that the average wait time for an F train after…

Q: A study compared the cost of restaurant meals when people pay individually versus splitting the bill…

A:

Q: What is the standard deviation (sd) of the number of  cardinal birds observed?

A:

Q: 3. A business consultant wanted to investigate if providing day care facilities on premises by…

A: given that,mean(x)=6.4standard deviation , s.d1=1.2number(n1)=50mean(y)=9.3standard deviation, s.d2…

Q: a small company is looking to see if they have reached their goal of $30.20, in saving per family.…

A:

Q: 6. Suppose that the average outstanding credit card balance for young professionals is 11,200 with a…

A: Given : The average outstanding credit card balance i.e. μ=11200 Standard deviation i.e. σ=2600…

Q: 1. A survey of National Capital Region finds the average commute time of employees on one way is 30…

A: 1. Step 1: Let μ be the population mean. The average commute time of employees on one way is 30…

Q: According to the 2016 National Survey on Drug Use and Health, 6.5% of teenagers aged 12-17 used…

A:

Q: 4. A line for tickets to a local concert had an average (mean) waiting time of 20 minutes with a…

A:

Q: A publisher is interested in the effects on sales of college texts that include more than 100 data…

A: Lets the sample mean and sample standard deviation for sample with more than 100 data file is…

Q: A recent CBS News survey reported that 67% of adults felt the U.S. Treasury should Fontinue making…

A:

Q: 4. The city manager has received complaints that local firefighters are underpaid. He gathers a…

A: Let X denotes salary of firefighter. The sample size is n=120.  Let μ denotes the average salary of…

Q: Suppose that 8% of all males suffer some form of color blindness. 350 men are sampled. a. What is…

A: