Total number of devices this system can talk to 16

This preview shows page 11 - 14 out of 119 pages.

total number of devices this system can talk to? - 16 The standard deviation of all possible sample proportions increases as the sample size increase. –False All continuous random variables are normally distributed -False The number of defective pencils in a lot of 1000 is an example of a continuous random variable. –False The normally distributed variables can have equal means and unequal standard deviations. –True The mean and median are the same for a normal distribution -True In a statistical study, the random variable X = 1, if the house is colonial and X = 0 if the house is not colonial, then it can be stated that the random variable is continuous. False The price to earning ratio for firms in a given industry is distributed according to normal distribution. In this industry, a firm with a standard normal variable value of Z = 1: -Has an above average price to earnings ratio The Eastern State University law school ranks graduating students based on their cumulative GPA and assigns a normal z score to each student. Regina Monson just completed all of the requirements for her law degree and her z score is 1.34. Based on her z score, we can conclude that she is in the upper _____ of her graduating class: -10% The standard deviation of a standard normal distribution is always equal to 1. True A students grade on examination was transformed to a z value which is negative. Therefore, we know that he scored: - Below the mean The mean life of pair of shows is 40 months with a standard deviation of 8 months. If the life of the shoes is normally distributed, how many pairs of shoes out of one million will need replacement before 36 months? -308,500
Image of page 11

Subscribe to view the full document.

The relationship between the standard normal random variable Z and normal random variable X is that: -The standard normal variable Z counts the number of standard deviations that the value of the normal random variable X is away from its mean The normal approximation of the binomial distribution is appropriate when: -np^3 5 and n(1-p)^3 5 A continuous probability distribution having a rectangular shape where the probability is evenly distributed over an interval of numbers is called a uniform probability distribution. –True The Central Limit Theorem states that as the sample size increases, the population distribution more closely approximates a normal distribution. –False If the random variable of x is normally distributed, ___% of all possible observed values of x will be within three standard deviations of the mean, -99.73 A continuous random variable may assume only integer values in a given interval -False The mean of the sampling distribution of X is always equal to the mean of the sampled population -True The z value tells us the number standard deviations that a value x is from the mean -True If a population distribution is known to be normal, then it follows that -None of the above Another name(s) for the normal distribution is (are…): -Both A and B (Bell Shaped and Gaussian) EXAM 2 Question 1   (4 points) A confidence interval increases in width as  Student response: Percent Value Correct Response Student Response Answer Choices 0.0% a. The level of confidence 
Image of page 12
increases 0.0% b. n decreases 0.0% c. s increases 100.0% d. All of the above
Image of page 13

Subscribe to view the full document.

Image of page 14

{[ snackBarMessage ]}

Get FREE access by uploading your study materials

Upload your study materials now and get free access to over 25 million documents.

Upload now for FREE access Or pay now for instant access
Christopher Reinemann
"Before using Course Hero my grade was at 78%. By the end of the semester my grade was at 90%. I could not have done it without all the class material I found."
— Christopher R., University of Rhode Island '15, Course Hero Intern

Ask a question for free

What students are saying

  • Left Quote Icon

    As a current student on this bumpy collegiate pathway, I stumbled upon Course Hero, where I can find study resources for nearly all my courses, get online help from tutors 24/7, and even share my old projects, papers, and lecture notes with other students.

    Student Picture

    Kiran Temple University Fox School of Business ‘17, Course Hero Intern

  • Left Quote Icon

    I cannot even describe how much Course Hero helped me this summer. It’s truly become something I can always rely on and help me. In the end, I was not only able to survive summer classes, but I was able to thrive thanks to Course Hero.

    Student Picture

    Dana University of Pennsylvania ‘17, Course Hero Intern

  • Left Quote Icon

    The ability to access any university’s resources through Course Hero proved invaluable in my case. I was behind on Tulane coursework and actually used UCLA’s materials to help me move forward and get everything together on time.

    Student Picture

    Jill Tulane University ‘16, Course Hero Intern