+
DATA FILE 3 SHOW ALL WORK CHAPTER FIVE

DATA FILE 3 SHOW ALL WORK CHAPTER FIVE

Rating:
Rating
(0)
Author: Christine Farr
Description:

http://theperfecthomework.com/data-file-3-show-all-work-chapter-five/

Data File 3Show all workChapter Five1) If light bulbs have lives that are normally distributed with a mean of 2500 hours and astandard deviation of 500 hours, what percentage of light bulbs have a life less than 2500hours?2) The lifetimes of light bulbs of a particular type are normally distributed with a mean of370 hours and a standard deviation of 5 hours. What percentage of bulbs have lifetimesthat lie within 1 standard deviation of the mean on either side?3) The amount of Jen’s monthly phone bill is normally distributed with a mean of $60 and astandard deviation of $12. Fill in the blanks:68% of her phone bills are between $______________ and $______________.4) The amount of Jen’s monthly phone bill is normally distributed with a mean of $50 and astandard deviation of $10. Find the 25th percentile.5) The diameters of bolts produced by a certain machine are normally distributed with amean of 0.30 inches and a standard deviation of 0.01 inches. What percentage of boltswill have a diameter greater than 0.32 inches?6) The annual precipitation amounts in a certain mountain range are normally distributedwith a mean of 88 inches, and a standard deviation of 10 inches. What is the likelihoodthat the mean annual precipitation during 25 randomly picked years will be less than 90.8inches?7) A final exam in Statistics has a mean of 73 with a standard deviation of 7.73. Assumethat a random sample of 24 students is selected and the mean test score of the sample iscomputed. What percentage of sample means are less than 70?8) A mean score on a standardized test is 50 with a standard deviation of 10. Answer thefollowinga. What scores fall between –1 and +1 standard deviation?b. What percent of all scores fall between –1 and +1 standard deviation?c. What score falls at +2 standard deviations?d. What percentage of scores fall between +1 and +2 standard deviations?Show all workChapter Six1) For the following questions, would the following be considered “significant” if itsprobability is less than or equal to 0.05?a. Is it “significant” to get a 12 when a pair of dice is rolled?b. Assume that a study of 500 randomly selected school bus routes showed that 480arrived on time. Is it “significant” for a school bus to arrive late?2) If you flip a coin three times, the possible outcomes are HHH, HHT, HTH, HTT, THH,THT, TTH, and TTT. What is the probability of getting at least one head?3) A sample space consists of 64 separate events that are equally likely. What is theprobability of each?4) A bag contains 4 red marbles, 3 blue marbles, and 7 green marbles. If a marble israndomly selected from the bag, what is the probability that it will be blue?5) The data set represents the income levels of the members of a country club. Estimate theprobability that a randomly selected member earns at least $98,000.112,000112,00086,000119,000126,00098,000105,00098,00090,00082,000140,000154,000133,000147,00094,00078,00094,000182,000126,000119,000 

(more)
See More
Try a College Course Free

Sophia’s self-paced online courses are a great way to save time and money as you earn credits eligible for transfer to over 2,000 colleges and universities.*

Begin Free Trial
No credit card required

25 Sophia partners guarantee credit transfer.

221 Institutions have accepted or given pre-approval for credit transfer.

* The American Council on Education's College Credit Recommendation Service (ACE Credit®) has evaluated and recommended college credit for 20 of Sophia’s online courses. More than 2,000 colleges and universities consider ACE CREDIT recommendations in determining the applicability to their course and degree programs.

Tutorial