Purchase Solution

list of 50 random phone numbers

Not what you're looking for?

Ask Custom Question

WHAT IS WRONG and WHY?

1. A statistician is going to survey a sample of 50 people. He prepared a list of 50 random phone numbers generated by a computer. Next morning he came to work at 8:00 and began to make calls. By 11:00 a.m., his survey was done.
2. The United Nation declared that the world's six-billionth inhabitant was born on October 12, 1999 in Bosnia.
3. Jim Smart started a furniture business in December, 1998. During that month, his factory produced 50 tables. During the whole 1999, 1000 tables were made. In January 2000, Jim proudly announced, "During the last year we increased our production 20 times!"

TRUE OR FALSE (WITH JUSTIFICATION)?

1. Class width = Upper limit of a class - Lower limit of the same class.
2. A class frequency may be equal to zero.
3. The data 9, 12, 18, 30, 25, 15, 8, 42, 29, 44, 31, 26 can be broken into 5 classes: 8-15, 16 - 23, 24 - 31, 32 - 39, 40 - 44. One of these classes is empty.

TRUE OR FALSE (WITH JUSTIFICATION)?

1. For a given data set, the mean and median are always nearly equal.
2. In the same set of data, two or more elements may have the same z score.
3. A negative z score is unusual.
4. For a set having only negative values, both the mean and standard deviation will be negative.

Purchase this Solution
Solution Preview

WHAT IS WRONG and WHY?

1. A statistician is going to survey a sample of 50 people. He prepared a list of 50 random phone numbers generated by a computer. Next morning he came to work at 8:00 and began to make calls. By 11:00 a.m., his survey was done.

In this case the sample surveyed will be less than 50 because when a computer generates random telephone number it is possible that some (or maybe most) of those numbers are invalid - thus no respnse will be achieved.

In order to actually survey 50 people, one would need a lot more than 50 random numbers

2. The United Nation declared that the world's six-billionth inhabitant was born on October 12, ...

Solution provided by:
Gaurav Agarwal, MS
Education
  • BE, Bangalore University, India
  • MS, University of Wisconsin-Madison
Recent Feedback
  • "Your explanation to the answers were very helpful."
  • "What does 1 and 0 means in the repair column?"
  • "Went through all of the formulas, excellent work! This really helped me!"
  • "try others as well please"
  • "Thank you, this helped a lot. I was not sure how to plug in those numbers to a formula. This was a great help. Now I have to figure out how to explain cost of capital is used in net present value analysis, and how cost of capital is used in net present value analysis. This stuff gets confusing."
Purchase this Solution
Free BrainMass Quizzes
Measures of Central Tendency

Tests knowledge of the three main measures of central tendency, including some simple calculation questions.

Know Your Statistical Concepts

Each question is a choice-summary multiple choice question that presents you with a statistical concept and then 4 numbered statements. You must decide which (if any) of the numbered statements is/are true as they relate to the statistical concept.

Measures of Central Tendency

This quiz evaluates the students understanding of the measures of central tendency seen in statistics. This quiz is specifically designed to incorporate the measures of central tendency as they relate to psychological research.

Terms and Definitions for Statistics

This quiz covers basic terms and definitions of statistics.

View More Free Quizzes
Related BrainMass Solutions

  • Binomial & Normal Probabilities

    However, it does list 50 separate phone numbers for "doctors" who treat birds, but only lists the single title "bird-doctor" and a phone number beside each number. It does not indicate any more information than that.

  • Choicing a sampling approach for a survey

    You work at DSS and have access to a list of their addresses and phone numbers. Your supervisor wants to be able to generalize the findings to all recent former clients.

  • Understanding Business Research Terms and Concepts

    Nominal (as the numbers have no arithmetic properties) • Respondents are asked to rate a list of high-tech companies as excellent, good, fair, or poor in terms of their service delivery.

  • Java Programming: Conference and Registrations

    While printing list of all attendees, it prints even the cost and travel information pertaining to an attendee.

  • Sorting Names by Phone Numbers on a File in C++

    305365 C++ console program that reads phone numbers from a file. It then performs sorting of records by name and by phone number. I need this program written in the c++ language. Process phone records.

  • Survey methods for marketing.

    - Have a survey on-line: if you had people's email addresses, you can send them the survey by email - Phone survey: If you had people's phone numbers you can call then and ask them about the survey.

  • The Law and 900 Telephone Charges: XYZ Company

    XYZ company's callers to telephone numbers with prefixes such as 900, 976, and 540 may be charged anywhere from 50 cents a minute to 50 dollars a call.

  • When it comes to the Do Not Call Registry, can cell phone nu

    The cell phone number that is to be listed on the do not call registry must be the same cell phone that is used to make the call, if registering by telephone (you can't use your home phone to list your cell phone number).

  • Digit probability

    Thus the probability of getting the number correct the first time he chooses the numbers at random is P = 1/{Number of combinations of choosing 7 unique numbers} = 1/7! As 7!

View More Related Solutions