Algebra

The mean amount of money withdrawn from a bank ATM on a particular day was $120. If Lauren withdrew $80 and her z-score was -3.2, what was the standard deviation for the amount withdrawn that day?

  1. 👍
  2. 👎
  3. 👁
  1. z-score = (given data - mean)/ sd
    -3.2 = (80-120)/sd
    -3.2sd = -40
    sd = 12.5

    1. 👍
    2. 👎

Respond to this Question

First Name

Your Response

Similar Questions

  1. math

    1. Which graph might show the temperature during a 24-hour period? (1 point) A B C D 2. Which graph might show the amount of money in a bank account if money is never taken out? (1 point) A B C D 3. Which graph might show the

  2. Finance

    1. What is an entrepreneur? (1 point) a sole proprietorship a corporation one who opens a new business a bank that loans money 2. Which of the following is the best definition of probable operating costs? (1 point) Amount of money

  3. Calculus Please help!

    If 7000 dollars is invested in a bank account at an interest rate of 7 per cent per year. A) Find the amount in the bank after 6 years if interest is compounded annually? B) Find the amount in the bank after 6 years if interest is

  4. Math

    A goblin miner earns 1 cent the first day, 2 cents the second day, 4 cents the third day, 8 cents the fourth day. How much will the miner earn in 30 days? Ok--I know to double the answer each time until 30--which would

  1. MATH

    I'm saving money over a year to buy a $157.50 gift. I start with an empty piggybank. I put in a small amount of money. Each month after January, I put in $1.75 more than I put in the previous month. By the end of the December I've

  2. math

    Vanessa deposited money into a bank account that earned 1.25% simple interest each year. After 1/2 year, she had earned $5.00 in interest on the account. If no other money was deposited into or withdrawn from the account, how much

  3. math

    How many years was the money in the account?Gloria deposited $500 into a bank account that earned 7.5% simple interest each year. She earned $225 in interest before closing the account. No money was deposited into or withdrawn

  4. Math

    If 3000 dollars is invested in a bank account at an interest rate of 6 per cent per year, find the amount in the bank after 12 years if interest is compounded annually Find the amount in the bank after 12 years if interest is

  1. calculus

    If 8000 dollars is invested in a bank account at an interest rate of 10 per cent per year, find the amount in the bank after 10 years if interest is compounded annually (a) b) Find the amount in the bank after 10 years if interest

  2. Math

    2. A sum of money, X was deposited in a savings account at 10% compounded daily on 25 July 1993. On 13 August 1993, RM600 was withdrawn and the balance as on 31 December 1993 was RM8900. Calculate the value of X using exact time

  3. Calculus :)

    If 8000 dollars is invested in a bank account at an interest rate of 10 per cent per year, find the amount in the bank after 11 years if interest is compounded annually ____ Find the amount in the bank after 11 years if interest

  4. Maths

    Mrs Ricky borrowed $5,340 at a bank at 9.5% per annum simple interest for 5 years. (A) the sum of money paid in interest to the bank. (B) the total amount of money repaid to the bank. (C) the value of each monthly installment.

You can view more similar questions or ask a new question.