Math

LongLast Inc. produces car batteries. The mean life of these batteries is 60 months. The distribution of the battery life closely follows the normal probability distribution with a standard deviation of 8 months.

As part of its testing program, LongLast tests a sample of 25 batteries.

What is the standard error of the mean?

  1. 👍 0
  2. 👎 0
  3. 👁 1,149
  1. try:
    http://davidmlane.com/hyperstat/z_table.html

    1. 👍 0
    2. 👎 0
  2. That does not help calculate the standard of error.

    1. 👍 0
    2. 👎 0
  3. http://www.miniwebtool.com/standard-error-calculator/

    8/sqrt(25) = 8/5 = 1.6

    1. 👍 0
    2. 👎 0

Respond to this Question

First Name

Your Response

Similar Questions

  1. physics

    A 12 V car battery is found to be capable of storing 2.00 kWh of electrical energy. For a certain electric car, it is necessary to develop 1.00 x 104 W of power to drive at 5.56 m/s. (a) Suppose that the car has 10 such batteries

  2. physics

    Alkaline batteries have the advantage of putting out constant voltage until very nearly the end of their life. How long will an alkaline battery rated at 1 A ⋅ h and 1.58 V keep a 1 W flashlight bulb burning?

  3. Physics

    A flywheel is a solid disk that rotates about an axis that is perpendicular to the disk at its center. Rotating flywheels provide a means for storing energy in the form of rotational kinetic energy and are being considered as a

  4. Math

    I am trying to solve a problem and am having difficulty solving it and do not know how to begin solving it. Samuel and Jason sell cans to a recycling center that pays $0.40 per pound of cans. the table shows the number of pounds

  1. science

    Assume that the batteries in the flashlight are rechargeable. What energy conversion would have to take place in order to recharge the batteries? is it electrical to chemical energy?

  2. statistics

    A manufacturer claims that the mean lifetime of its lithium batteries is 1400 hours. A homeowner selects 25 of these batteries and finds the mean lifetime to be 1380 hours with a standard deviation of 80 hours. Test the

  3. Statistics

    the manufacturer of a certain brand of auto batteries claims the mean life of these batteries is 45 months. A consumer protection agency that wants to check this claim took a random sample of 36 such batteries and found the mean

  4. math

    A company is considering implementing one of two quality control plans for monitoring the weights of automobile batteries that it manufactures. If the manifacturing process is working properly, the battery weights are

  1. math

    Suppose that an automobile parts wholesaler claims that .5 percent of the car batteries in a shipment are defective. A random sample of 200 batteries is taken, and four are found to be defective. (a) Use the Poisson approximation

  2. General Education

    Aron: The two double A batteries in my CD player are dead, so the CD player doesn’t work. My television remote control, which also uses two double A batteries, works fine. So if I move the two batteries from my television remote

  3. Statistics

    A certain company makes 12-volt car batteries. After many years of product testing, the company knows that the average life of a battery is normally distributed, with a mean of 45 months and a standard deviation of 7 months. If

  4. statistics

    The Acme Company has developed a new battery. The engineer in charge claims that the new battery will operate continuously for at leas 7 minutes longer than the old battery. To test the claim, the company selects a simple random

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