The mean life of a certain brand of auto batteries is 44 months with a standard deviation of 1 month. Assume that the lives of all auto batteries of this brand have a bell-shaped distribution. Using the empirical rule, find the percentage of auto batteries of this brand that have a life of 42 to 46 months.

Q: In 1980 and again in 2010, a Gallup poll asked a random sample of 1000 US citizens "Are you in favor…

A:

Q: You throw a ball as far as you can 5 times, recording the distance for each throw: 165 feet, 184…

A: since only 5 observation is given we will consider them as sample (n = 5)and population (N = 100)…

Q: Find the mean, 80th percentile and standard deviation: 2,-3,7,5,-2,3

A: Solution-: Given data: 2,-3,7,5,-2,3 We want to find, (a) The mean=? (b) The 80th percentile=? (c)…

Q: A medical lab tested a sample of 8 vials of blood for acidity on the pH scale.  Use this data to…

A:

Q: A researcher measures the amount of food consumed by each dog in her lab. She finds that the mean…

A: It is given that mean amount of food is 12 oz and number of dogs is 16. The sum of squared…

Q: Of the 200 American film enthusiasts, the average age is: 30 years, while the standard deviation is…

A: Normal distribution is generally denser in the center, and basically less denser at the tails. There…

Q: A vending machine dispenses coffee into a twelve-ounce cup. The amount of coffee dispensed into the…

A: Vending machine dispenses coffee into a 12 ounce cupx=12standard deviation()=0.07

Q: Assume that men's heights are normally distributed with mean 69.2 inches and standard deviation 2.9…

A: Let x be the heights of men's which follows normal distribution with mean 69.2 inches and standard…

Q: A couple plans to have 14 children. Assume that girl and boy births are equally likely. Find the…

A: A couple plans to have 14 children. Assume that girl and boy births are equally likely.

Q: alculate the median of the data shown, to two decimal places, 24.4,11.1,2.1,29,8.7,6.9,6.6,1.1

A: The given data is 24.4,11.1,2.1,29,8.7,6.9,6.6,1.1

Q: Español A certain manufacturer makes 400W light bulbs. Assume that these light bulbs have lifetimes…

A: Given that: Population mean=μ=435. Population standard deviation=σ=60.

Q: (a) Find the 45h percentile of the lengths. th (b) Find the 76 percentile of the lengths.

A: (a) The 45th percentile of the lengths is, PX<x=0.45PX-μσ<x-47840=0.45Pz<x-47840=0.45 The…

Q: Find the mean for the following data 5, 3, 4, 8, 1, 4 Round your answer to the nearest hundredth…

A: Solution

Q: Fimd the Z score associated with the 15th percentile.

A:

Q: A vending machine dispenses coffee into a twelve-ounce cup. The amount of coffee dispensed into the…

A: Normal Distribution:Normal Distribution:The normal distribution is a continuous probability…

Q: The amount of caffeine in a sample of five-ounce servings of brewed coffee is shown in the…

A: Solution:  The frequency distribution for the data is  f Midpoint x xf 2 70.5 141 10 92.5 925…

Q: The governor of Florida would like to estimate the mean age of all Florida residents. To do so, he…

A: We have given that he randomly selects 500 Florida residents and determines their mean age to be…

Q: A medical lab tested a sample of 8 vials of blood for acidity on the pH scale.  Use this data to…

A:

Q: The highway mileages of 147 cars are in a file named CARS2.+ These cars are 2003 models. Find the…

A: Mean Formula The mean formula is defined as the sum of the observations divided by the total number…

Q: Use your favorite search engine to find 10 daytime high temperatures from where you live. After…

A:

Q: Place the following in order to show how you find the standard deviation. Take the square root of…

A:

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

A:

Q: For the month of April, a checking account has a balance of $539 for 22 days, $2318 for 3 days, and…

A: To calculate the mean daily balance for April, we need to determine the total balance for the entire…

Q: Find the mean and standard deviation of the filling numbers:  30,25,10,30,45,60,30,25,20

A: Mean of the filling numbers is Mean=sum of the all numbers /no  of  given observation Mean…

Q: Which graph represents P81? Choose the correct graph below. O A. O B. The temperature for P81 is…

A: Let Z denote the readings on the thermometre. Given that Z follows N(0,1)

Q: A California lake has been stocked with rainbow trout. These trout have an average length of 24…

A: Given Information: Mean μ=24 Standard deviation σ=3 Someone goes fishing and catches a trout that is…

Q: Identify which of the following are the correct symbol and value for the point estimate of the…

A: Point estimate of population mean is sample mean

Q: The highway mileage (mpg) for a sample of 8 different models of a car company can be four below.…

A: Given data, 19,23,26,27,30,32,34,34

Q: You want to know the percentage of utility companies that earned revenue greater than 94 million…

A: Given Mean(μ)=60standard deviation(σ)=15

Q: for the data shown, answer the questions, round to 2 decimal places,…

A: Answer:- Given data  10.9, 12.5, 29.8, 19.3, 19.7, 23.3, 2.8, 29.2, 23.5.                Find the…

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.