• Q : Quartile of the bmi distribution....
    Basic Statistics :

    Suppose that you pick 10 adult males at random. What is the probability that at least one of them has BMI more than Q3 = 28.34, the third quartile of the BMI distribution?

  • Q : Find the third decile....
    Basic Statistics :

    Women's weights are normally distributed with a mean of 143 lb and a standard deviation of 29 lb. Find the third decile, D3, which separates the bottom 30% from the top 70%

  • Q : Determine the miles per gallon....
    Basic Statistics :

    Determine the miles per gallon such that approximately 75% of the automobiles of this model have less than this miles per gallon. (Please show steps)

  • Q : Mediocre portfolio managers....
    Basic Statistics :

    Good portfolio managers beat the benchmark in 80% of the years. Mediocre portfolio managers beat the benchmark in 40% of the years. Only 1/3 of all managers are good; the rest are mediocre. A friend

  • Q : Confidence interval for difference in mean neurologic....
    Basic Statistics :

    That the margin of error in a 95 % confidence interval for the difference in mean neurologic function scores between men and women does not exceed 2 units.

  • Q : Expected number of ticket holders....
    Basic Statistics :

    An airline, believing that 7% of passengers fail to show for flights, overbooks (sells more tickets than there are seats). Suppose that for a particular flight involving a jumbo-jet with 260 seats,

  • Q : Chi-squared random variable....
    Basic Statistics :

    From the relationship between the chi-squared random variable and the gamma random variable, prove that the mean of the chi-squared random variable is v and the variance is 2v.

  • Q : Find the probability of a false alarm....
    Basic Statistics :

    Find the probability of a false alarm. If an observation has a calue of 4 volts in the prescence of noise, what is the probability of detection (that is, there is a valid signal present that exceeds

  • Q : Heart transplant for people ages....
    Basic Statistics :

    The time spent(in days) waiting for a heart transplant for people ages 35-49 can be approximated by the normal distribution: mean = 201 and standard deviation = 26.9 What waiting time represents th

  • Q : Nal examination for the course....
    Basic Statistics :

    An English literature professor hands out a list of four essay questions, two of which will appear on the nal examination for the course. One of the students taking the course is pressed for time an

  • Q : Average return for large-cap domestic stock funds....
    Basic Statistics :

    The average return for large-cap domestic stock funds over the three years 2009-2011 was 14.8%. Assume the three-year returns were normally distributed across funds with a standard deviation of 4.8%

  • Q : Percentile salary for male professors....
    Basic Statistics :

    If the standard deviation for the salaries of both genders is approximately $5200 and the salaries are normally distributed, find the 90th percentile salary for male professors and for female profes

  • Q : Most expensive hotel rooms....
    Basic Statistics :

    New York City is the most expensive city in the United States for lodging. The mean hotel room rate is $204 per night (USA Today, April 30, 2012). Assume that room rates are normally distributed wi

  • Q : Find the probability that there is at least....
    Basic Statistics :

    Suppose that a box contains 5 candies, in which 2 of them are sugar-free. You select two candies and eat them. Find the probability that there is at least 1 sugar-free candy remaining in the box.

  • Q : Standarad deviation for average person of number....
    Basic Statistics :

    In the U.S., it is estimated that an average person makes 4 visits a year to the doctor's office. What is the mean and standarad deviation for an average person of the number of monthly visits to the

  • Q : Find the expected value-variance and standard deviation....
    Basic Statistics :

    What is the probability that 2 workers will retire at 65? Find the expected value, variance, and standard deviation of the random variable X defined as 'retirement at 65'.

  • Q : Find the probability that the book....
    Basic Statistics :

    A bookshelf contains 20 textbooks for different subjects. Among those, 10 of them are used ones, and 10 of them are brand new. You select 2 books and sell one at a time on Oct 11, and Oct 12. Find

  • Q : Graph is used to visually represent....
    Basic Statistics :

    Discuss the data that the graph is used to visually represent. Speculate on why the editor chose the graph, as opposed to merelyreporting the data

  • Q : Distribution of the population of grades....
    Basic Statistics :

    A random sample of 16 statistics examinations from a large population was taken. The average score in the sample was 78.6 with a variance of 64. We are interested in determining whether the average

  • Q : Course of an arbitrary workday....
    Basic Statistics :

    The number N of devices that a technician must try to repair during the course of an arbitrary workday is a random variable having a geometric distribution with parameter p = 1/8. We estimate the pr

  • Q : Inches and standard deviation....
    Basic Statistics :

    Suppose heights of adults (measured in inches) are normally distributed with mean 70 inches and standard deviation 10 inches. What can be said about an adult height of 100 inches?

  • Q : Question regarding genotype frequencies....
    Basic Statistics :

    Kuru is a prion disease of the Fore people of highland New Guinea. Kuru is similar to Creutzfeldt-Kakob disease. It was once transmitted by the consumption of deceased relatives at mortuary feasts,

  • Q : Assumption of a normal distribution....
    Basic Statistics :

    Models of the pricing of stock options often make the assumption of a normal distribution. An analyst believes that the price of an Initech stock option varies from day to day according to normal di

  • Q : Calculate the probability that the series ends....
    Basic Statistics :

    Calculate the probability that the series ends in 4 games,5 games, 6 games, or 7 games. What is the expected value of X , the number of games ittakes to complete the series? Repeat (a) and (b) under t

  • Q : Prepares for an exam by studying....
    Basic Statistics :

    A student prepares for an exam by studying a list of 10 problems. She can solve 7 of them. For the exam, the instructor selects 6 questions at random from the list of 10. What is the probability tha

©TutorsGlobe All rights reserved 2022-2023.