Bags checked for a certain airline flight have a mean weight of 14,69 kg with a standard deviation of 8 kg. A random sample of 63 bags is drawn. What is the z- score in order to find the probability that the sample mean weight is less than 13,68 kg? Round the answer to two decimal places.

Q: The diameters of ball bearings are distributed normally. The mean diameter is 87 mm and the standard…

A:

Q: A random sample of 45 cars in the drive-thru of a popular fast food restaurant revealed an average…

A: given that,population standard deviation, σ =4.89sample mean, x =17.79size (n)=45

Q: The mean number of words per minute (WPM) read by sixth graders is 98 with a standard deviation of…

A:

Q: Most colleges here in the Philippines requires applicants for admission to take the College…

A: Consider X : scores on CAT X~Nμ=527,σ=112

Q: Question Completion Status: 9AMoving to another question will save this response. TOQuestion 6 of…

A:

Q: The combined SAT scores for the students at a local high school are normally distributed with a mean…

A: Given: Mean=1487 standard deviation=307

Q: The sample of five companies in the aerospace industry was surveyed as to their return on investment…

A: We have to find sample variance s2  and sample standard deviation...

Q: 44%  of students in a class have black hair. If 66 students are chosen at random, what is the…

A:

Q: The total annual precipitation for a region is approximately normally distributed with a mean of…

A: Given data normal distributionμ = 1050 mmσ = 400 mmP(1050<x<1300) = ?

Q: Cody took his first physics exam and scored an 80. The population mean for this exam is 70, and the…

A: Solution: It is given that, Population mean, 70 Standard deviation, 5 Given that Cody took his first…

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

A:

Q: The weights of steers in a herd are distributed normally. The standard deviation is 300⁢lbs and the…

A:

Q: C. Find the probability that a randomly selected district had fewer than 1994 votes for President…

A:

Q: Trucks in a delivery fleet travel a mean of 130 miles per day with a standard deviation of 39 miles…

A: The data on per day mileage of a delivery truck is normally distributed. Population mean, Population…

Q: If 70 shafts are sampled at random from the batch, what is the probability that the mean diameter of…

A: Let X be the random variable of the diameter of metal shafts produced in a manufacturing…

Q: Determine the sample standard deviation.

A: Given  29.6 32.4 38.7 42.4 44.5 46.4 49.0 60.8 70.2 Now sample size (n) = 9…

Q: The weights of steers in a herd are distributed normally. The standard deviation is 200lbs. and the…

A: Let "X" be the weight of steers in a herd.

Q: A random sample of 42 cars in the drive-thru of a popular fast food restaurant revealed an average…

A:

Q: For a measure of  body weight, converted to z or standard scores, what is the probability of having…

A: Solution For standard normal distribution, Mean=0  & standard deviation = 1. Find:

Q: The operation manager at a tire manufacturing company believes that the mean mileage of a tire is…

A: The question is about central limit theorem Given : Popl. mean mileage of a tire ( μ ) = 40097 miles…

Q: Trucks in a delivery fleet travel a mean of 120120 miles per day with a standard deviation of 3333…

A: Given that, Mean (m)=120 Standard deviation (sd) = 33 The mileage per day is distributed normally.…

Q: An operation manager at an electronics company wants to test their amplifiers. The design engineer…

A: Obtain the probability that the mean amplifier output would differ from the population mean by…

Q: A sample of 38 people are taken who who owns a red pair of shows. The std is 23 with an unlnown mean…

A: To determine the probability of making a type II error and the power, we need to know the level of…

Q: The weight of elephants at a zoo in Pittsburgh has a population mean of 5.3 tons and population…

A: Given Mean(μ)=5.3standard deviation(σ)=1.2sample size(n)=12

Q: Solve the following problem and show your complete solutions. Explain your answer for better…

A: The length of time that a phone will work before it needs charging is normally distributed with mean…

Q: height of 80.1 inches and standard deviation of 2.97 inches. Round your answers to four places after…

A:

Q: The ACT math scores of a particular high school in New Jersey are approximately normally…

A: Given data, σ=100P(200<X<800)=0.997By using emperical formula99.7% of data lies within μ-3σ…

Q: Assume that the average weight of an NFL player is 245.7 lbs with a standard deviation of 34.5 lbs.…

A: Given information: μ=245.7σ=34.5sample size, n=32

Q: The distances golf balls travel under laboratory testing conditions are normally distributed. The…

A:

Q: A racing car consumes a mean of 103 gallons of gas per race with a standard deviation of 6 gallons.…

A:

Q: d. Determine the sample standard deviation. Round your answer to 2 decimal places. e. Determine the…

A: The data set are :- X :- 29.6 32.4 38.7 42.4 44.5 46.4 49.0 60.8 70.2 Then,  We will find sample…

Q: use an ti84 device to solve.  The head of maintenance at XYZ Rent-A-Car believes that the mean…

A: Given: Mean μ=4959 Standard deviation σ=448 Sample size n=43

Q: sample of 8 students scored the following grades: 20, 40, 35, 30, 57, 57, 46, 42. Find the sample…

A: Given Data: 20, 40, 35, 30, 57, 57, 46, 42

Q: The scores on the exam public health professionals take to be certified follows a normal…

A:

Q: The table summarizes results from 975 pedestrian deaths that were caused by automobile accidents.…

A: Required probability is P(pedestrian was not intoxicated or driver was intoxicated)

Q: Trucks in a delivery fleet travel a mean of 100100 miles per day with a standard deviation of 3535…

A: The objective of this question is to find the probability that a truck drives less than 148 miles in…

Q: 60% of all the students passed an exam. If a random sample of 10 students is selected, What is the…

A: n=10, p=0.60

Q: There are 225 dogs that participated at the National Dog Show that weigh an average of 5 kilos, with…

A: given data  n = 30 μ = 5σ = 3.5P(4<x¯<7) = ?

Q: A soft drink machine outputs a mean of 29 ounces per cup. The machine's output is normally…

A: given data normal distributionμ = 29σ = 4P(25<x<31) = ?

Q: he mean weight of all Goliath grouper caught on the Treasure coast is 377 pounds, with a standard…

A: The normal distribution  in the center are generally denser and basically less denser at tails.…

Q: Assume that the average weight of an NFL player is 245.7 lbs with a standard deviation of 34.5 lbs.…

A: given data  normal distribution μ = 245.7σ = 34.7 n = 32 P(240<x¯<260) = ?

Q: DA researcher takes an SRS of 80 people who go golting.The average age of all golfers was determined…

A: The provided information are: Sample sizen=80Population meanμ=52Population stabdard deviationσ=6…

Q: About 10% of the population had a particular genetic mutation. 900 people are randomly selected.…

A: The formula of the standard deviation is,

Q: pan's finishing time for the Bolder Boulder 10K race was 1.67 standard deviations faster than the…

A: Z - score = X- μσ~N(0,1) ______________________________ Z- score says how many standard dev it is…

Estimation

A new framework of data analysis where the new statistical methods are used for interpreting the results and analyzing the data is known as estimation in statistics.