In this group of 10 students what is the mean and variance, Ask an Expert

Statistics

10% of students in a university are dissatisfied with the services at their cafe. 10 students were selected randomly and were asked to fill out surveys.

(a) In this group of 10 students, what is the mean and variance of the number that were dissatisfied?

(b) If, instead, 55% of the students were dissatisfied, what is the probability that at least half of the 10 would be dissatisfied?

(c) If 55% of the students were dissatisfied and 200 were selected randomly, what is the probability that at least half would be dissatisfied? Can this problem be done using the Normal Distribution? Why? If yes, solve it using the Normal Distribution.

View complete question

Statistics and Probability, Statistics

Category:- Statistics and Probability
Reference No.:- M9120693

Have any Question?Write your Review or question?

Related Questions in Statistics and Probability

A student is gathering data on the driving experiences of

A student is gathering data on the driving experiences of other college students. One of the variables measured is the type of car the student drives. These data are coded using the following method: 1 = subcompact, 2 = ...

1 it appears that new car purchases have peaked in 2018 vs

1) It appears that new car purchases have peaked in 2018 vs. used car purchases. The following probability distribution table shows the random variable x, where x is the number of new cars purchased by household during t ...

Lisa anderson expects to need 80000 for a down payment on a

Lisa Anderson expects to need $80,000 for a down payment on a house in six years. How much would she have to invest today in an account paying 7.25 percent in order to have $80,000 in six years? (Round answer to 2 decima ...

An important part of the customer service responsibilities

An important part of the customer service responsibilities of a cable company relates to the speed with which trouble in service can be repaired. Historically, the data show that the likelihood is 0.75 that troubles in a ...

The assessment of the allocation of profits and losses is

The assessment of the allocation of profits and losses is one of the three key areas in which process?

The acme insurance company has two types of customers

The ACME Insurance Company has two types of customers, careful and reckless. A careful customer has an accident during the year with probability 0.01. A reckless customer has an accident during the year with probability ...

You are considering an investment in a 40-year security the

You are considering an investment in a 40-year security. The security will pay $25 a year at the end of each of the first three years. The security will then pay $30 a year at the end of each of the next 20 years. The no ...

A comitttee of 3 persons is selected at random from a group

A comitttee of 3 persons is selected at random from a group of 5 mathematicians and 8 physicists. What is the probability that one is a mathematician

Rework problem 25 from section 41 of your text involving a

Rework problem 25 from section 4.1 of your text involving a car saleswoman. Assume that showing a car is a Bernoulli trial, and each time she shows a car, there is a probability of 0.05 that the customer will buy the car ...

Jennifers broker has shown her two options in the

Jennifer's broker has shown her two options in the securities market for investment. Security one is a bond of par value of $1,000. The bond has a coupon interest rate of 11% paid annually maturing in seven years, with y ...

4,153,160 Questions Asked
13,132 Experts
2,558,936 Questions Answered

Ask Experts for help!!

Looking for Assignment Help?

Start excelling in your Courses, Get help with Assignment

Write us your full requirement for evaluation and you will receive response within 20 minutes turnaround time.

Ask Now Help with Problems, Get a Best Answer

Recent Questions

Ask Statistics and Probability Expert