The diameter of a brand of ping-pong balls is approximately normally distributed, with a mean of 1.32 inches and a standard deviation of 0.04 inch. A random sample of 4 ping-pong...

The diameter of a brand of ping-pong balls is approximately normally distributed, with a mean of 1.32 inches and a standard deviation of 0.04 inch. A random sample of 4 ping-pong...

Two stores sell a certain product. Store A has 40% of the sales, 4% of which are of defective items, and store B has 60% of the sales, 3% of which are of defective items. The difference in defective...

A bag contains 9 red chips and 5 blue chips. Two chips are selected randomly without replacement from the bag. What is the probability (rounded to 3 decimal places) that the two chips are the same...

please explain

the given standard deviation is 2.4 for young adults

Let X(ω) = min{1.5,max{2ω,1}}. Find the values a such that P(X = a) > 0, and find these probabilities. Find FX. Is it continuous?

An auto analyst is conducting a satisfaction survey, sampling from a list of 10,000 new car buyers. The list includes 2,500 Ford buyers, 2,500 GM buyers, 2,500 Honda buyers, and 2,500 Toyota buye...

x=10, 30, 50, 70, 90 y= 17, 5a+3, 32, 7a-11, 19

A professir plans classes carefully that the length of her classes are uniformly distributed between 48.0 and 58.0 minutes

In a certain state license plates consist of 4 letters (26 letters in the alphabet) followed by 4 numbers (0-9). How many different license plates can be made in which no letter or number appears...

When someone buys a ticket for an airline flight, there is a 0.0988 probability that the person will not show up for the flight. A certain jet can seat 15 passengers. Is it wise to book 17 passengers...

if the targets over 16 month is an average of 25, how many orders must be received in month 16 to achieve this?

70% of all children live with a dog. If 25 children were selected at random, what is the probability that at most 10 of them will be living with a dog?

Assume you have the scores of the first, second, and final exam for a group of students. Suppose a student miss the first and/or second exam. What are the most appropriate statistics approaches that...

A company produces steel rods. The lengths of the steel rods are normally distributed with a mean of 166.5-cm and a standard deviation of 2.2-cm. Find the probability that the length of a...

A manufacturer knows that their items have a normally distributed length, with a mean of 18.8 inches, and standard deviation of 2.3 inches. If one item is chosen at random, what is the probability...

Assume that the readings at freezing on a batch of thermometers are normally distributed with a mean of 0°C and a standard deviation of 1.00°C. A single thermometer is randomly selected and tested...

Assume that the readings at freezing on a batch of thermometers are normally distributed with a mean of 0°C and a standard deviation of 1.00°C. A single thermometer is randomly selected and tested...

Between z=0 and z=1.95

The authors of the paper "Fudging the Numbers: Distributing Chocolate Influences Student Evaluations of an Undergraduate Course"† carried out a study to see if events unrelated to an undergraduate...