1 a manufacturer claims that their light bulbs have an, Ask an Expert

Statistics

1. A manufacturer claims that their light bulbs have an average life span of µ = 1200 hours with a standard deviation of σ = 25. If you randomly test 36 light bulbs and find that their average lifespan is X‾ = 1150, does a .95 confidence interval for µ suggest that the claim µ = 1200 is unreasonable?

2. Compute a .95 confidence interval for the mean in the following situations: (a) n = 12, σ = 22, X‾= 65, (b) n = 22, σ = 10, X‾= 185, (c) n = 50, σ = 30, X‾ = 19.

View complete question

Statistics and Probability, Statistics

Category:- Statistics and Probability
Reference No.:- M92208171

Have any Question?Write your Review or question?

Related Questions in Statistics and Probability

A travel analyst claims that the mean room rates at a

A travel analyst claims that the mean room rates at a three-star hotel in Chicago is greater than $152. In a random sample of 36 three-star hotel rooms in Chicago, the mean room rate is $165 with a standard deviation of ...

Determine the minimum sample size required when you want to

Determine the minimum sample size required when you want to be 98% confident that the sample mean is within two units of the population mean. Assume a standard deviation of 4.82 in a normally distributed population.

Depaul university makes student ids of length 5 characters

DePaul University makes student IDs of length 5 characters by picking 2 letters from D,E,P,A,U,L; no repetitions and the order is not important followed by picking 3 digits from 0,1,2,3,4,5,6,7,8,9; no repetitions and th ...

Can you look for multicollinearity between a categorical

Can you look for multicollinearity between a categorical independent variable and a continuous dependent variable or can you only look for multicollinearity between a continuous independent variable and a continuous depe ...

The mean height of women in a country ages 20-29

The mean height of women in a country? (ages 20-?29) is 63.5 inches. A random sample of 65 women in this age group is selected. What is the probability that the mean height for the sample is greater than 64 ?inches? Assu ...

The average or par score for an 18 hole golf course is

The average, or "par" score for an 18 hole golf course is 72. The score is computed by counting the number of swings, or "strokes" a player must make with their club to hit the ball into each of the 18 holes on the golf ...

Based on labor statistics17nbspof workers in a particular

Based on labor? statistics,17% of workers in a particular profession are female. Complete parts a through e below based on a random sample of 8 workers in this profession. a. What is the probability that exactly one work ...

Many high school students take the ap tests in different

Many high school students take the AP tests in different subject areas. In 2007, of the 144,796 students who took the biology exam 84,199 of them were female. In that same year, of the 211,693 students who took the calcu ...

A hotel claims thatnbsp95 of its customers are very

A hotel claims that 95?% of its customers are very satisfied with its service. Complete parts a through d below based on a random sample of seven customers. What is the probability that more than six customers are very? ...

Given the following information from pharoah corporation

Given the following information from Pharoah Corporation, what price would the CAPM predict that the company's stock will trade for one year from today? (Do not round intermediate calculations. Round final answer to 2 d ...

4,153,160 Questions Asked
13,132 Experts
2,558,936 Questions Answered

Ask Experts for help!!

Looking for Assignment Help?

Start excelling in your Courses, Get help with Assignment

Write us your full requirement for evaluation and you will receive response within 20 minutes turnaround time.

Ask Now Help with Problems, Get a Best Answer

Recent Questions

Ask Statistics and Probability Expert