probability

posted by .

Hello,
If mean is say 33 seconds and standard deviation under root of 10.45 then prob of less than 18 seconds results in Z = -4, but the tables for norm distribution don't have 4 in them.. how to get round this problem?

  • probability -

    P < .0001

Respond to this Question

First Name
School Subject
Your Answer

Similar Questions

  1. Math

    A physical fitness association is including the mile run in its secondary-school fitness test. The time for this event for boys in secondary school is known to possess a normal distribution with a mean of 450 seconds and a standard …
  2. Statistics

    If a completion time for a task is normally distributed with a mean of 15 seconds and a standard deviation of 2.5 seconds, what is the probability of getting a time less than 9.7 seconds?
  3. statistics

    The length of country and western songs is normally distributed and has a mean of 200 seconds and a standard deviation of 30 seconds. Find the probability that a random selection of 9 songs will have mean length of 186.30 seconds or …
  4. fnu

    The length of country and western songs is normally distributed and has a mean of 200 seconds and a standard deviation of 30 seconds. Find the probability that a random selection of 9 songs will have mean length of 186.30 seconds or …
  5. Statistics

    1. The average time it takes for a cellphone to reboot is 3 minutes with a standard deviation of 10 seconds. The average time it takes a computer to restart is 5 minutes with a standard deviation of 15 seconds. Both are normally distributed. …
  6. Statistics

    Waiting times to receive food after placing an order at the sandwich shop follow an exponential distribution with a mean of 46 seconds.?
  7. stats

    One company produces movie trailers with mean 150 seconds and standard deviation 40 seconds, while a second company produces movie trailers with mean 120 seconds and standard deviation 30 seconds. What is the probability that two randomly …
  8. Statistics

    ATM transaction times are normally distributed with a mean of 150 seconds and a standard deviation of 45 seconds. What is the probability a person takes less than 60 seconds to complete their transaction?
  9. maths(Please help me out)

    A survey of mobile call interconnectivity indicates that the average time it takes to connect calls from one network to the other is 25 seconds.Assume the variable is approximately normally distributed and the standard deviation is …
  10. Math3( Please Help Assignment Due)

    80 U2 songs (in seconds) were selected at random. Assume that the data is normally distributed and that the bands entire collection of songs has a mean and standard deviation equal to those calculated(mean=289.7 or 290, standard deviation= …

More Similar Questions