# Month: March 2021

#### Solved (Free): A trucking firm has a large inventory of spare parts that have been in storage for a long time. It knows that some proportion of these spare parts will have deteriorated to the point where they are no longer usable

A trucking firm has a large inventory of spare parts that have been in storage for a long time. It…

#### Solved (Free): An admissions officer has determined that the population of applicants to the MBA program has undergraduate GPA that are approximately

An admissions officer has determined that the population of applicants to the MBA program has undergraduate GPA' that are approximately…

#### Solved (Free): Six soil samples taken from a particular region were subjected to chemical analysis to determine the pH of each sample

Six soil samples taken from a particular region were subjected to chemical analysis to determine the pH of each sample,…

#### Solved (Free): The true proportion of defective memory chips produced by a certain company is p. Suppose a random sample of 400 memory chips are tested

The true proportion of defective memory chips produced by a certain company is p. Suppose a random sample of 400…

#### Solved (Free): At a collection agency, 80% of the accounts are eventually paid in full. Over the next month, the collection agency gets 120 new accounts

At a collection agency, 80% of the accounts are eventually paid in full. Over the next month, the collection agency…

#### Solved (Free): Suppose the amount of rain that falls on a particular day in New York is a random variable with mean 20 mm

Suppose the amount of rain that falls on a particular day in New York is a random variable with mean…

#### Solved (Free): Thirty percent of all customers who enter a store will make a purchase. Suppose that six customers enter the store and that these customers

Thirty percent of all customers who enter a store will make a purchase. Suppose that six customers enter the store…

#### Solved (Free): Suppose small aircraft arrive at a certain airport at a rate of twelve per hour and that the random variable

Suppose small aircraft arrive at a certain airport at a rate of twelve per hour and that the random variable…

#### Solved (Free): The total cholesterol levels of a sample of men aged 35-44 are normally distributed with a mean of 209 milligrams per deciliter

The total cholesterol levels of a sample of men aged 35-44 are normally distributed with a mean of 209 milligrams…

#### Solved (Free): How many people should be surveyed if we want to estimate the proportion of students who prefer using the test center

How many people should be surveyed if we want to estimate the proportion of students who prefer using the test…