ou are a researcher studying the lifespan of a certain species of bacteria. A preliminary sample of 35 bacteria reveals a sample mean of ¯x=78x¯=78 hours with a standard deviation of s=5.6s=5.6 hours. You would like to estimate the mean lifespan for this species of bacteria to within a margin of error of 0.5 hours at a 95% level of confidence. What sample size should you gather to achieve a 0.5 hour margin of error? Round your answer up to the nearest whole number.

Q: A sample of n=25 scores has a mean of 68. Find the z-score for this sample. If it was obtained from…

A:

Q: You are a researcher studying the lifespan of a certain species of bacteria.  A preliminary sample…

A: The provided information are: Population standard deviation σ=4 Margin of error (E) = 0.5 Confidence…

Q: a) What is the setup for your null and alternative hypothesis? b) What is the value of the test…

A: Here AS PER POLICY I HAVE CALCULATED 3 SUBPARTS PLZ REPOST FOR REMAINING PARTS WITH NOTE I NEED…

Q: You are a researcher studying the lifespan of a certain species of bacteria. A preliminary sample of…

A: Given:Desired margin of error E=0.75 hours.The sample standard deviation Confidence level is 90 %,…

Q: You are a researcher studying the lifespan of a certain species of bacteria.  A preliminary sample…

A: Given information:- s = 6.4 x¯=70 hours M.E = 0.6 Confidence level = 99%…

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Q: You are a researcher studying the lifespan of a certain species of bacteria. A preliminary sample of…

A: It is given that the confidence level is 0.95, the standard deviation is 5.6, and the margin of…

Q: You are a researcher studying the lifespan of a certain species of bacteria.  A preliminary sample…

A: Let. X: The lifespan of a certain species of bacteria in hours.  Given: Sample size = n =25 Sample…

Q: You are a researcher studying the lifespan of a certain species of bacteria.  A preliminary sample…

A: Given,margin of error(E)=0.45standard deviation(S)=5.4α=1-0.95=0.05α2=0.025Z0.025=1.96         (from…

Q: deviation of s=7s=7  hours.  You would like to estimate the mean lifespan for this species of…

A:

Q: You are a researcher studying the lifespan of a certain species of bacteria.  A preliminary sample…

A: Here, n=40, x-bar=74, s=4.4, E=0.6.

Q: You are a researcher studying the lifespan of a certain species of bacteria.  A preliminary sample…

A:

Q: You are a researcher studying the lifespan of a certain species of bacteria.  A preliminary sample…

A:

Q: duction of 12 male red-winged blackbirds before and after receiving testosterone implants was…

A: given:  d = 0.056  sd = 0.175  probability of 0.8, mean change of 0.01

Q: You are a researcher studying the lifespan of a certain species of bacteria.  A preliminary sample…

A:

Q: In a population of exam scores, a score of X = 88 corresponds to z = 2 and a score of X = 79…

A: From the provided information, A score of X = 88 corresponds to z = 2 A score of X = 79 corresponds…

Q: A researcher studying the lifespan of a certain species of bacteria. A preliminary sample of 25…

A: It is given that the confidence level is 0.99, the standard deviation is 4.4, and the margin of…

Q: A researcher studying the lifespan of a certain species of bacteria. A preliminary sample of 35…

A:

Q: A standardized test, deigned to measure the mathematical skill level of seventh graders is said to…

A: Given information: μ=75, n=25x¯=79, s=10 Null hypothesis: H0 : μ=75 Alternative hypothesis: HA :…

Q: A random sample of 46 adult coyotes in a region of northern Minnesota showed the average age to be x…

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Q: You are a researcher studying the lifespan of a certain species of bacteria.  A preliminary sample…

A: Given information- Sample standard deviation, s = 6 hours Confidence interval = 0.98 Significance…

Q: A random sample of adult female reaction times has a sample mean of x¯=394.3 milliseconds and sample…

A: We first find 140.5 is how many SD (standard deviation) away from the mean 394.3 So, 140.5 is 3SD…

Q: A sample of n=25 scores has a mean of 68. Find the z-score for this sample. If it was obtained from…

A:

Q: In an exam for a statistics class, the class average is 68 with a standard deviation 4. If a student…

A: Given mean μ= 68, standard deviation σ= 4 Let X: score of the students = 75

Q: You are a researcher studying the lifespan of a certain species of bacteria.  A preliminary sample…

A:

Q: A cohort of patients have lost on average 23 pounds and the standard deviation of the sample is 1.2…

A: We have been given that a cohort of patients have lost on average 23 pounds and the standard…

Q: You are a researcher studying the lifespan of a certain species of bacteria.  A preliminary sample…

A:

Q: A researcher wants to know the lifetime of a "BL" brand lamp. For necessity research, it takes 9…

A: Given : Population Mean life , μ = 1500 hrs Population standard deviation , σ = 111 hrs

Q: The scores on a standardized test are normally distributed with a mean of 90 and standard deviation…

A: The test score is 0.6 standard deviations above the mean is obtained below: From the given…

Q: You are a researcher studying the lifespan of a certain species of bacteria.  A preliminary sample…

A:

Q: You are a researcher studying the lifespan of a certain species of bacteria.  A preliminary sample…

A: Given,Sample standard deviation, s = 5.4 hours Margin of error, E = 0.5 hourConfidence level, C =…

Q: You run a multiple regression with 64 cases and three explanatory variables. Software output gives…

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Q: We have a recent set of data of n=30 Americans, the sample mean = 14 hours per day, the standard…

A: The sample mean and population mean is whether related or not is calculated using the z test when…

Q: You are a researcher studying the lifespan of a certain species of bacteria. A preliminary sample of…

A: The sample size for the preliminary study  = 30The sample mean, x¯=70 hoursThe sample standard…

Q: A researcher studying the lifespan of a certain species of bacteria. A preliminary sample of 35…

A: Given : Margin of error =0.5 Standard deviation (s) =7 Confidence level =95%

Q: You are a researcher studying the lifespan of a certain species of bacteria. A preliminary sample of…

A: Answer:- Given, Sample mean, x¯ = 72  Sample standard deviation, S = 5  Margin of error (E) = 0.45…

Q: onsider a population that has a score of X = 15 associated with a z-score of +1.50. What does this…

A: Given: X=15  z-score =+1.50

Q: You are a researcher studying the lifespan of a certain species of bacteria.  A preliminary sample…

A: Given,margin of error(E)=0.6standard deviation(s)=5.8α=1-0.98=0.02α2=0.01Z0.01=2.3263      (from…

Q: The antibody production of 12 male red-winged blackbirds before and after receiving testosterone…

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Q: g) What are your conclusions in the context of the problem? Relate your conclusions to the test…

A:

Q: You are a researcher studying the lifespan of a certain species of bacteria.  A preliminary sample…

A: Given Information :  You are a researcher studying the lifespan of a certain species of bacteria.  A…

Q: A researcher studying the lifespan of a certain species of bacteria. A preliminary sample of 30…

A: From the provided information, Standard deviation (s) = 7 hours Margin of error (E) = 0.75…

Q: You are a researcher studying the lifespan of a certain species of bacteria.  A preliminary sample…

A: We have to find sample size required.