biostats

what is the probability by Pr( X ≥ 8) years where X is normally distributed with mean 5.24 and sd = 1.90?

HELP!!!
thank you!

  1. 👍 0
  2. 👎 0
  3. 👁 120
  1. complete this:

    We estimate the probability by Pr( X ≥ 8) years where X is normally distributed with mean 5.24 and sd = 1.90.
    Assuming normal distribution we want prob that x >=8
    P(x>=8) = P(Z >= (8 - 5.24)/1.90) = P(Z >= 1.45) = 1 - P(Z<1.45) =

    1. 👍 0
    2. 👎 0
  2. use a z-score table to find the portion of the population below 1.45 sd above the mean

    looks like about .93

    so prob X ≥ 8 is ... 1 - .93

    1. 👍 0
    2. 👎 0

Respond to this Question

First Name

Your Response

Similar Questions

  1. Statistics

    Astronomers treat the number of stars in a given volume of space as a Poisson random variable. The density in the Milky Way Galaxy in the vicinity of our solar system is one star per 16 cubic light years. (a) What is the

  2. Math

    Hi can someone please help me? A recent study gave the information shown in the table about ages of children receiving toys. The percentages represent all toys sold. Age (years) Percentage of Toys 2 and under 3-5 6-9 10-12 13 and

  3. probability

    On any given day, mail gets delivered by either Alice or Bob. If Alice delivers it, which happens with probability 1/4, she does so at a time that is uniformly distributed between 9 and 11. If Bob delivers it, which happens with

  4. statistics

    the random variable x is known to be uniformly distributed between 70 and 90. the probability of x having a value between 80 to 95 is

  1. Stats

    In 1898 L. J. Bortkiewicz published a book entitled The Law of Small Numbers. He used data collected over 20 years to show that the number of soldiers killed by horse kicks each year in each corps in the Prussian cavalry followed

  2. Help please! Math

    A car is designed to last an average of 12 years with a standard deviation of 0.8 years. What is the probability that a car will last less than 10 years?

  3. statistics

    The ages of commercial aircraft are normally distributed with a mean of 13.0 years and a standard deviation of 7.5 years what percentage of individual aircraft have ages greater than 15 years assume that a random sample of 49

  4. statistics

    1. When designing motorcycle helmets, the breadth of a person's head must be considered. Men have head breadths that are normally distributed with a mean of 6.0 inches and a standard deviation of 1.0 inches. If one male is

  1. Statistics

    The Amount of filling a half-liter (500ml)soft drink bottle is normally distributed. The process has a standard deviation of 5ml. The mean is adjustable. A. Where should the mean be set to ensure a 95% probability that a

  2. Statistics 2023

    Suppose there is a 11.2% probability that a randomly selected person is aged 20 years or older and is also a jogger. In addition there is a 23.8% chance that a person is 20 years or older, female, given that he or she also jogs.

  3. atlantic

    A car is designed to last an average of 12 years with a standard deviation of 0.8 years. What is the probability that a car will last less than 10 years?

  4. Statistics

    The ages of commercial aircraft are normally distributed with a mean of 13.5 years and a standard deviation of 7.3 years. What percentage of individual aircraft have ages greater than 15 ​years?

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