A quality control expert at LIFE batteries wants to test their new batteries. The design engineer claims they have a variance of 38443844 with a mean life of 997997 minutes. If the claim is true, in a sample of 7373 batteries, what is the probability that the mean battery life would be less than 981.7981.7 minutes? Round your answer to four decimal places.

Q: Mr. Jackson is looking at test scores for his Algebra 2 class. The scores on the Unit 2 Test follow…

A: We have to find given probability.

Q: The blue catfish (Ictalurus Furcatus) is the largest species of North Amercian catfish. The current…

A: Note- As per our policy we can answer only the first 3 sub-parts of a question. If you want…

Q: A dietician read in a survey that 85.36% of adults in the U.S. do not eat breakfast at least 3 days…

A:

Q: A cigarette manufacturer claims that one-eighth of the US adult population smokes cigarettes. In a…

A: Given: P = 18 = 0.125 n = 100 X = 5 α = 0.05 Formula Used: Test-statistic Z = p-PP(1-P)n

Q: Using z scores, a population with u = 37 and o = 6 is standardized so that the new mean is u = 50…

A:

Q: A sample of n = 5 scores has a mean of M = 9. What is EX for this sample? %3D %3D

A: Given: Sample size = n = 5  Mean = M = 9 We have to find ∑X for the given data.

Q: A sample of 124 kissing couples were observed, with 44 of them leaning their heads to the left. Use…

A: The test statistic for One sample proportion test is as follows…

Q: Assume thAt scores on a standardized test are known to follow a bell shaped distribution with a mean…

A: L

Q: Several years ago, researchers conducted a study to determine whether the "accepted" value for…

A: The provided information is as follows:The sample mean is .The sample standard deviation is .The…

Q: The range and the variance are both measures of distance.

A: Solution-: The range and the variance are both measures of distance.

Q: A physical therapist wanted to know whether the mean step pulse of men was less than the mean step…

A: The study is about to know whether the mean step pulse of mean was less than the mean step pulse of…

Q: researcher in a large university claimed that the mean health care expenses differ from the national…

A: From the given information, Consider,  μ=$1570n=50x=$1680s=$180α=0.05

Q: A physical therapist wanted to know whether the mean step pulse of men was less than the mean step…

A: In above table  Given 95% CI for difference in mu men - mu women  (-10.67,-1.13)

Q: If sp2 = 7.37, n1 = 6 and n2 = 6, what is the estimated standard error of the mean difference,…

A: Denote μ1, μ2 as the means of 1st population) and 2nd population, respectively.

Q: The life of light bulbs is distributed normally. The variance of the lifetime is 625 and the mean…

A: Given information- Population mean, µ = 570 hours Population variance, σ2 = 625 So, Population…

Q: The variance of the scores on a skill evaluation test is 123,201 with a mean of 1528 points. If 343…

A:

Q: A physical therapist wanted to know whether the mean step pulse of men was less than the mean step…

A: Solution: From the given information, the claim is that the mean step pulse of men was less than the…

Q: A population has a stand. dev. of 24. on average, how much difference should there be between the…

A:

Q: The average number of pounds of red meat a person consumes each year is 196 with a standard…

A: We are given,μ = 196σ = 22n = 60

Q: study found that 1.21% of Social Security recipients are too young to vote. If 800 Social Security…

A: Given that  A study found that 1.21% of Social Security recipients are too young to vote. P = 0.0121…

Q: A population of N= 23 scores has a mean of u = 5. After one score is removed, the mean is found to…

A: Given that - A population of N= 23 scores has a mean of u = 5. After one score is removed, the mean…

Q: The life of light bulbs is distributed normally. The variance of the lifetime is 225and the mean…

A: The probability of a bulb lasting for at most 540 hours is calculated below:

Q: on the average, it takes Hans solo 45 seconds to check the coordinates and make the jump into…

A: Given that: Population mean, μ=45 Population standard deviation, σ=5

Q: The life of light bulbs is distributed normally. The variance of the lifetime is 225225 and the mean…

A: Given that variance = 225, mean = 590 Find the probability of a bulb lasting for at most 607?

Q: The scores of individual students on the ACT Exam are modeled as normally distributed with a mean of…

A:

Q: A sample of 9 freshmen takes a reading comprehension test and their scores are a mean of 10 and…

A: Consider that μ defines the population mean score.

Q: A USE SALT (a) State the null hypotheses Ho and the alternate hypothesis H,. Ho: H -Select- H:…

A:

Q: A psychologist is studying smokers' self-images, which she measures by the self-image (SI) score…

A: From the provided information, Sample size (n) = 10 Sample mean (x̄) = 177 Sample standard deviation…

Q: population of N = 10 scores has a mean of µ = 6. After one score is removed, the mean is found to be…

A: given data  population size (N) = 10 population mean ( μ) = 6 after removing one score : new mean =…

Q: In elderly Americans, a new blood test is being developed to diagnose a particular disease. Suppose…

A: According to the provided information, Sensitivity is 80% and specificity is 70%. True Positive (A)…

Q: Solve the problem. Assume that mountain lions' weights are normally distributed with a mean of 62.6…

A: We have given that,  X be the random variable from normal distribution with mean (μ) = 62.6 ,…

Q: The life of light bulbs is distributed normally. The variance of the lifetime is 225 and the mean…

A:

Q: Rick took a test that is known to produce normally distributed grades with a mean of 72 and a SD of…

A:

Q: Mr. Jackson is looking at test scores for his Algebra 2 class. The scores on the Unit 2 Test follow…

A: Given that.   X~N( μ , ?^2 )   μ=89    , ?=3   Z-score =( x - μ )/?

Q: A grocer finds that the cantaloupes in his store have weights with mean 0.7 kg and standard…

A: Given, Mean weight of cantaloupes is 700 gm. Standard deviation is 53 gm

Q: A population of N=5 scores has a mean of μ=8. After one score is removed, the mean is found to be…

A: We have to find given missing score.

Q: The mean number of words per minute (wpm) typed by a speed typist is 133 with a variance off 144…

A: Given that , = 133, 2 = 144 So , = 12, n = 90 Let  be the mean of sample. = 133  =  /n = 12/90=…

Q: A geologist is making guesses about the mean length of fossil teeth of a certain species found in a…

A: From the provided information,

Q: A sample of n=11 scores has a mean of M=9. If one new person with a score of X=4 is added to the…

A: Given that, A sample of n=11 scores has a mean of M=9. One new person with a score of X=4 is added…

Q: Using z scores, a population with u = 37 and o = 6 is standardized so that the new mean is u = 55…

A: Given : Original population  Mean=37 Standard deviation =6   After standardization  Mean=55 Standard…

Q: On Mary’s FACEBOOK page, there is a 42% chance that one of her friends will write on her wall. If…

A: Given : p = 0.42 n = 2400

Q: ple of n = 15 scores has a mean of M = 6.  One person with a score of X = 22 is added to the sample.…

A: The mean formula is, Mean = Sum of all observations/ Total observations, Given: Mean (M) = 6 Total…

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.