An electrical firm manufactures light bulbs that have a length life with normal distribution, and a standard deviation of o = 10 hours. A sample of size n = 100 is obtained, and its sample mean is calculated to be ī = 320 hours. Find the 95% confidence interval for the average length life µ. Find the upper 95% bound for the average length life u. Find the lower 95% bound for the average length life u. Give vour answer as intervals. Use - 00 and oo if needed.

Q: The process that produces Purple Bars is intended to produce candy bars with a mean weight of 55 gm.…

A: Mean = 55Standard deviation = 0.9n = 59x' = 54.82

Q: It takes an average of 8 minutes for blood to begin clotting after an injury.  An EMT wants to see…

A: Given : sample size, n = 54 sample mean, x̄ = 7.3 sample standard deviation,s= 2.0…

Q: According to a survey, the mean height for men is 69.1 inches. In a sample of 280 men between the…

A: given data claim : μ < 69.1n = 280x¯ = 68.9σ = 2.88

Q: A student made three measurements of the mass of an object using a balance (± 0.01 g) and obtained…

A: Given Data: Measure # 1 4.39 ± 0.01 g Measure # 2 4.42 ± 0.01 g Measure # 3 4.41 ± 0.01 g

Q: It takes an average of 10 minutes for blood to begin clotting after an injury.  An EMT wants to see…

A: Given, population mean,µ = 10 population standard deviation (σ) = 3.5 sample size (n)  = 54 sample…

Q: Does it take a different amount of time for seeds to germinate if they are near rock music that is…

A: Since you have posted a question with multiple sub-parts, we will solve first three subparts for…

Q: It takes an average of 11.2 minutes for blood to begin clotting after an injury.  An EMT wants to…

A:

Q: The human population has a mean IQ score of µ = 100 and a standard deviation of σ = 15. Find the…

A: From the given information, µ = 100 and σ = 15.

Q: It takes an average of 12.6 minutes for blood to begin clotting after an injury.  An EMT wants to…

A: Hey there! Thank you for posting the question. Since your question has more than 3 parts, we are…

Q: Let x be a random variable that represents the pH of arterial plasma (i.e., acidity of the blood).…

A:

Q: It takes an average of 12.4 minutes for blood to begin clotting after an injury.  An EMT wants to…

A:

Q: people who were playing roulette is 55.5 with a standard deviation of 3.2 years. Can it be concluded…

A: The random sample  of people who were playing slot machines, The random sample of people who were…

Q: The average production of peanuts in Virginia is 3,000 pounds per acre. A new plant food has been…

A: Let be the population mean production of peanuts in Virginia. The average production of peanuts in…

Q: Unfortunately, arsenic occurs naturally in some ground water.t A mean arsenic level of u= 8.0 parts…

A: We have given that  Sample size n=36 ,xbar = 7.1 ,mu=8bbp ,s=2.2 and level of significance =0.01

Q: An experiment was conducted to estimate the effect of smoking on the blood pressure of a group of 31…

A: The sample size is 31, sample mean is 9.1 and sample standard deviation is 5.3.

Q: Ages of Gamblers The mean age of a sample of 25 people who were playing the slot machines is 49.9…

A: The Welch's t - test should be used to compare the mean differences between two population groups…

Q: Assume that an adult female is randomly selected. Suppose females have pulse rates that are normally…

A: Solution Let "X" be the female pulse rates in bpm. Refer Standard normal table/Z-table, Lookup…

Q: The standard deviation of pulse rates of adult males is  less 11 bpm. For a random sample of  128…

A:

Q: The average American man consumes 9.6 grams of sodium each day. Suppose that the sodium consumption…

A: Given Information : The average American man consumes 9.6 grams of sodium each day. Suppose that…

Q: The t-value of t = fall between -to.95 and to.95 because to.95

A: given that n = 13  sample mean =  1195 sample standard deviation = 169.3  population mean = 1016

Q: It takes an average of 13.5 minutes for blood to begin clotting after an injury.  An EMT wants to…

A: (1)   Determine what type of test is used for testing for problem.   The type of test is used for…

Q: A Christmas tree light has an expected life of 200 hr and a standard deviation of 3 hr. Suppose…

A: Given that μ=200 and σ=3. The distribution of the lifetime of Christmas tree light is unknown.

Q: The mean of electrical energy consumption amounts for a home during a​ two-month period is 2417…

A: Given information Mean µ = 2417 kWh Standard deviation σ = 521 kWh Using Range Rule of thumb Minimum…

Q: A nutritionist claims that the mean tuna consumption by a person is 3.3 pounds per year. A sample of…

A: Given,   Sample size = 70 Sample mean = 3.1 Population standard deviation = 1.14

Q: standardized test statistic?  What is the P Value?

A: Claim- tuna consumption by a person is 3.2 pounds per year. sample size(n) = 60 Mean tuna…

Q: Consider a value to be significantly low if its z score less than or equal to  minus −2 or consider…

A: Consider a value to be significantly low if its z score less than or equal to minus −2 or consider a…

Q: Assume that the heights of a population of adults form a normal distribution with a mean µ =69…

A: It is known that, there are 12 inches in 1 foot.The provided information are:

Q: The mean pulse rate (beats per minute) of a random sample of 40 males was 67.3 bpm. For a random…

A: we have given that  n1=40 .n2=40 ,xbar1=67.3 ,xbar2=77.5 and sigma1=10.3 ,sigma2=11.6

Q: A population of scores has µ=44. In this population, a score of X= 40 corresponds to z= - 0. 50.…

A:

Estimation

A new framework of data analysis where the new statistical methods are used for interpreting the results and analyzing the data is known as estimation in statistics.