5. Find the standard deviation. (Round to 3 decimals.)

Q: 29. The standard deviation of a variable is 15. If a sample of 100 individuals is selected, what…

A: Since you have posted more than one question, we are answering the first question as per our rule.…

Q: What

A: Explanation and solutions is given below....

Q: .Suppose a population is known to be normally distributed with a mean, u, equal to 144 and a…

A: Given data,μ=144σ=27P(90<144)=?

Q: d) What is the probability that the number of drivers will be 10 or more? e) Find the mean and the…

A:

Q: There are 15 numbers on a list, and the mean is 25. The smallest number on the list is changed from…

A: The numbers in the list is 15, the mean is 25 and the smallest number is changed from 12.9 to 1.29.

Q: Find the standard deviation, σ, for the binomial distribution which has the stated values of n and…

A: n = 48; p = 3/5 X ~ N(n, p) Standard deviation = npq                                = 48×35×25…

Q: Find the standard deviation, , for the binomial distribution which has the stated values of n and p.…

A: The standard deviation for the binomial distribution is given by,

Q: (d) If the sample size is n= 16, what is the standard deviation of the population from which the…

A: Using central limit theorem.

Q: Find the mean and standard deviation of the numbers below.  3 7 5 4 5 6 7 8 6 5

A: First of all, let's arrange the data in a particular order(ascending) for further calculation. i.e…

Q: 5. What percentage of values fall within one standard deviation? (use Z-table to calculate)

A:

Q: A pharmaceutical company claims that a drug is effective in treating 90% of people having severe mig…

A: Given information: The percentage of people having severe migraine headaches is 90%. That is, p=0.90…

Q: Find the probability that a sample of 18 has a sample mean below 32. The population mean is 24 and…

A: Central Limit Theorem for mean: If a random sample of size n is taken from a population having mean…

Q: 9. The mean July daily rainfall in Waterville is 10 mm and the standard deviation is 1.5 mm. Assume…

A: Consider a random variable X which represent that amount of daily rainfall in Waterville in the…

Q: 47 If the mean of a test score is 30 and the standard deviation is 3.7, which score could be…

A:

Q: d) Find the cut-off for the top 30% of electricity usage in a 4 person household. e) What is the…

A: Given a Uniform distribution : Lower limit = a = 857 Upper limit = b = 945   d) We need to find x…

Q: 30.To see if young men ages 8 through 17 years spend more or less time than the national average of…

A:

Q: A researcher who she’s to estimate within $2 the average repair cost for a refrigerator.  if she…

A: From the provided information, Population standard deviation (σ) = $15.25 Confidence level = 95%…

Q: In Pittsburgh, Pennsylvania, about 56% of the days in a year are cloudy. Find the mean, variance,…

A: Given, In a year 56% of days are cloudy. Now during June month 30 days. Each day is independent of…

Q: find the standard deviation, for the binomial distrubution which has n=48 and p=3/5. Round answer to…

A:

Q: Here are the number of hours that each of a group of students studied for this exam: 2 4 22 2 1 4 1…

A: Solution Number of samples (n) = 10 Let "X" be the number of hours that each of a group of students…

Q: 5- calculate the Standard deviation of the following sub image.* 10 6 10 7 7 4 Your answer 4.

A: Given problem Given that   Steps to find Standard deviation :   i) Mean should be calculated by…

Q: a. What is the mean of the time interval? b. What is the standard deviation of the time interval? c.…

A: From the provided information, The probability density function of uniform distribution can be…

Q: Find the standard deviation, σ, for the binomial distribution which has n = 48 and p = 3/5. Round…

A: Given: n = 48 p=35

Q: What is the average score for those who are willing to rise to the challenege with the standard…

A: Here X takes values 1, 2, 3, 4, 5 with following frequencies The average score is calculated using…

Q: A researcher wishes to determine how much money per week is spent on groceries in a small Western…

A: Given : ME< 3.0 σ= 18.0 At 98.0 % confidence level , z score= 2.326 Need to find the minimum…

Q: There are 15 mobile phones in a package box, 9 of which are iphones. If a person takes 5 phones from…

A:

Q: A set of final examination grades in an introductory statistics course is normally dis-tributed with…

A: Given that  Mean=mu=79 Standard deviation=sigma=12 X~Normal (mu=79,sigma=12) Note: According to…

Q: n pulse rate​ (in beats per​ minute) of adult males is equal to 69 bpm. For a random sample of 164…

A: As the population standard deviation is not known, we will use t distribution.

Q: An accountant is studying the attendance levels at the concerts of a touring rock band. She finds…

A: Let x¯ be the mean number of attendees at a performance in her study for 62 performances which…

Q: (g) How many of these flights would you except to be on time? (h) What is the standard deviation?

A: The binomial distribution is a discrete probability distribution where the probability of x…

Q: How many standard deviation above or below the average guitar cost is the guitar?

A: Given, The cost of guitar (X=$650) The mean cost of guitar is μX=$550 The standard deviation cost of…

Q: In a job fair, 3000 applicants applied for a job. Their mean age was found to be 28 with a standard…

A: The mean is 28 and the standard deviation is 4.

Q: You are an educational researcher at McMaster University. Suppose you know that 22.7% of the entire…

A:

Q: has averaged 7.48 mg/L with a standard deviation of 1.6 mg/L. If 10 students measure the sulfate in…

A: Given: sample size, n = 10Mean, μ =7.48std. deviation, σ = 1.6

Q: Among US Households, only 15% have a landline phone.  A telemarketing campaign will involve a SRS of…

A: Given data, p=15%=0.15 n=2250 standard deviation of X=?

Q: d the population standard deviation for the number of smallmouth bass caught per day by each nt…

A: The formula to compute the population standard deviation is,

Q: 4. The average waist size for teenage males is 29 inches with the standard deviation of 2 inches.…

A:

Q: A health care professional wishes to estimate the birth weights of infants. How large a sample must…

A:

Q: a) Find the standard deviation. b) What is the percentage of students who have scored less than 72?…

A: Given that Number of students who have scored more than 80 = 480 Let X denote scores of the…

Q: 29. The standard deviation of a variable is 15. If a sample of 100 individuals is selected, what…

A: The complete solutions are given below

Q: 4) Which of these samples would have the smallest standard deviation? a. 101, 92, 84, 131 b. -25,…

A:

Q: What is the standard error?

A: Let , X→N(μ=28000 , σ=7200) , N=20000 , n=64 By using central limit theorem , The sampling…

Q: 4. The variance of a data set is 3410.56. Find the standard deviation for the data set.

A:

Q: A test consists of 260 true or false questions. If the student guesses on each question, what is the…

A: Binomial distribution: A discrete r.v. X taking values 0,1,2,3, …., n is said to follow a binomial…

Q: Given n=10 measurements: 13, 15, 14, 16, 20, 15, 16, 19, 12, 18 The standard deviation is

A:

Q: d) What is the standard deviation for the number of adult Americans out of the 20 we would expect to…

A: We have given that,  X be the random variable from Binomial distribution with probability of success…

Q: Sixteen percent of the world's population is left-handed. A researcher claims that left-handed…

A: a) mean (p) = 0.16 , q = 1 - 0.16 = 0.84 , n =2100

Q: 9.- American women's height are approximately normally distributed with mean 63.8 inches and…

A:

Q: In a certain​ distribution, the mean is 70 with a standard deviation of 5. At least what fraction…

A: Given. μ=70 σ=5 We have to determine the fraction of of the numbers are between 60 and 80.…