9:5998VERSITY LABORATORY HIGH SCHOOL -SENIOR HIGH4Z score of an area 0.25 from the tahle me the areann ..A 5. What is the variance of the probability distribution?A. 6.67В.4C. 3.46D. 2.58For numbers 6 - 10, refer to the following problem. The time it takes for Grade 11 students in a certainschool to complete a physical fitness test is normally distributed with mean 15 minutes and a standarddeviation of 4 minutes.B 6. What is the corresponding z-score of 12.5 minutes?A. 0.63В. 0.62C. -0.62D. -0.63What is the probability that a student completes the physical fitness in less than 14 minutes?A. 40.52%В. 40.13%C. 39.74%D. 39.36%8. What is the longest time to complete the test of a student whose time belongs to the middle60% of all recorded times?A. 11.64 minB. 16 minC. 17.53 minD. 18.36 minE9. If the students who get the fastest 5% completion times will be exempted from the additionalgym workout session, what is the slowest time that a student can have to qualify for theexemption?A. 8.40 minB. 8.42 minC. 8.44 minD. 8.46 min10. What is the fastest completion time of the students who belong to the longest 25% of allcompletion times?A. 17.68 minВ. 17.66 minC. 17.64 minD. 17.62 minFor numbers 11- 15, refer to the following problem. Suppose that the shelf life of Buko pies has anormal distribution with a mean of 36 hours and a standard deviation of 2.4 hours. Random samples ofsize 25 are taken.11. What is the mean of the sampling distribution of the sample mean?A. 24В. 30С. 36D. 42E/S.742. What is the variance of the sampling distribution of the sample mean?B. 0.2304C. 0.48D. 1A. 0.09638E/0.993 What is the probability that the average shelf life of a random sample of size 25 is greater than35 hours?А. 1B. 0.9912C. 0.9812D. 0.9712C14. What is the probability that the shelf life of the random sample of size 25 is less than 36.5hours?A. 0.8485B. 0.8508C. 0.8531D. 0.855415. What is the probability that the shelf life of the random sample of size 25 is between 35 to 37hours?A. 0.8941B. 0.8961C. 0.8972D. 0.8983A 16. What is the best point estimate of the population mean?A. the sample meanB. the sample median

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For numbers 6- 10, refer to the following problem. The time it takes for Grade 11 students in a certain school to complete a physical fitness test is normally distributed with mean 15 minutes and a standard deviation of 4 minutes. B 6. What is the corresponding z-score of 12.5 minutes? A. 0.63 B. 0.62 C.-0.62 D. -0.63 E/S 7. What is the probability that a student completes the physical fitness in less than 14 minutes? A. 40.52% B. 40.13% C. 39.74% D. 39.36% 8. What is the longest time to complete the test of a student whose time belongs to the middle 60% of all recorded times? A. 11.64 min B. 16 min C. 17.53 min D. 18.36 min

For numbers 6- 10, refer to the following problem. The time it takes for Grade 11 students in a certain school to complete a physical fitness test is normally distributed with mean 15 minutes and a standard deviation of 4 minutes. B 6. What is the corresponding z-score of 12.5 minutes? A. 0.63 B. 0.62 C.-0.62 D. -0.63 E/S 7. What is the probability that a student completes the physical fitness in less than 14 minutes? A. 40.52% B. 40.13% C. 39.74% D. 39.36% 8. What is the longest time to complete the test of a student whose time belongs to the middle 60% of all recorded times? A. 11.64 min B. 16 min C. 17.53 min D. 18.36 min

A First Course in Probability (10th Edition)

10th Edition

ISBN:9780134753119

Author:Sheldon Ross

Publisher:Sheldon Ross

Chapter1: Combinatorial Analysis

Section: Chapter Questions

Problem 1.1P: a. How many different 7-place license plates are possible if the first 2 places are for letters and...

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