GRADED PROBLEM SET #6 Answer each of the following questions completely. There are a total of...
GRADED PROBLEM SET #6
Answer each of the following questions completely. There are a total of 20 points possible in the assignment.
- A manufacturer of compact fluorescent light bulbs advertises
that the distribution of the lifespans of these light bulbs is
nearly normal with a mean of 9,000 hours and a standard deviation
of 1,000 hours.
- What is the probability that a randomly chosen light bulb lasts more than 10,500 hours?
- What is the probability that the mean lifespan of 15 randomly chosen light bulbs is more than 10,500 hours?
- Could you estimate the probabilities from parts a and b if the lifespans of light bulbs had a skewed distribution? Explain.
- The Pew Research Center estimates that as of January 2014, 89% of 18-29 year olds in the United States use social networking sites. Calculate the probability that at least 91% of 500 randomly sampled 18-29 year olds use social networking sites.
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GRADED PROBLEM SET #6
Answer each of the following questions completely. There are a
total of...
Practice Problem set 4 (Due Tuesday) Bonus points 3 Name Answer the following questions using the...
Practice Problem set 4 (Due Tuesday) Bonus points 3 Name Answer the following questions using the data gathered by researchers, from a random sample of undergraduate students during Spring 2015. 1. It is estimated that that Shoe size of adults 18-20 yrs. Follows a normal distribution with mean 9.5 and sd-2 (55 follows N(9.5, 2)). Test if this is true for the sample of 31 students using the 68, 95, 99.5 rule for normal distributions. Interval Number in this interval...
problems 4, 5, 6, 11 and 13 If the population standard deviation was doubled to 10.4...
problems 4, 5, 6, 11 and 13
If the population standard deviation was doubled to 10.4 and the level of confidence remained at 90%, what would be the new margin of error and confidence interval Margin of error, E. Confidence interval: 20.11<x<34.31 O Did the confidence interval increase or decrease and why? increase 4. Definition of Confidence Intervals (Section 6.1) Circle your answer, True of False. • A 99% confidence interval means that there is a 99% probability that the...
Questions 1-6 please. ASAP please. will rate, ty. QUESTION 1 There are dozens of personality tests...
Questions 1-6 please. ASAP please. will rate, ty.
QUESTION 1 There are dozens of personality tests available on the World Wide Web. One test, scored on a scale of 0 to 200, is designed to give an indication of how "personable" the test taker is, with higher scores indicating more "personability." Suppose that scores on this test have a mean of 96 and a standard deviation of 24. Complete the following statements about the distribution of scores on this personality...
Please answer the marked questions.......... Please show your work............. that all young adult men is greater...
Please answer the marked questions..........
Please show your work.............
that all young adult men is greater the IC than 50 min d the 65 74 66 37 45 68 64 50 48 65 58 55 52 63 59 57 74 65 the 11.38 1138 The club professional at a difficul that his course is so tough that t course boasts average golfer loses a dozen or more golf balls d ng a round of golf. A dubious golfer sets out...
1. We reject the null hypothesis only when: a. our sample mean is larger than the population mean. b. the p value asso...
1. We reject the null hypothesis only when: a. our sample mean is larger than the population mean. b. the p value associated with our test statistic is greater than the significance level of the test we have chosen. c. our sample mean is smaller than the population mean. d. the p value associated with our test statistic is smaller than the significance level of the test we have chosen. 2. In a study of simulated juror decision making, researchers...
Practice Problem set 4 (Due Tuesday) Bonus points 3 Name Answer the following questions using the data gathered by researchers, from a random sample of undergraduate students during Spring 2015. 1. It is estimated that that Shoe size of adults 18-20 yrs. Follows a normal distribution with mean 9.5 and sd-2 (55 follows N(9.5, 2)). Test if this is true for the sample of 31 students using the 68, 95, 99.5 rule for normal distributions. Interval Number in this interval...
problems 4, 5, 6, 11 and 13
If the population standard deviation was doubled to 10.4 and the level of confidence remained at 90%, what would be the new margin of error and confidence interval Margin of error, E. Confidence interval: 20.11<x<34.31 O Did the confidence interval increase or decrease and why? increase 4. Definition of Confidence Intervals (Section 6.1) Circle your answer, True of False. • A 99% confidence interval means that there is a 99% probability that the...
Questions 1-6 please. ASAP please. will rate, ty.
QUESTION 1 There are dozens of personality tests available on the World Wide Web. One test, scored on a scale of 0 to 200, is designed to give an indication of how "personable" the test taker is, with higher scores indicating more "personability." Suppose that scores on this test have a mean of 96 and a standard deviation of 24. Complete the following statements about the distribution of scores on this personality...
Please answer the marked questions..........
Please show your work.............
that all young adult men is greater the IC than 50 min d the 65 74 66 37 45 68 64 50 48 65 58 55 52 63 59 57 74 65 the 11.38 1138 The club professional at a difficul that his course is so tough that t course boasts average golfer loses a dozen or more golf balls d ng a round of golf. A dubious golfer sets out...
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