You are a researcher studying the lifespan of a certain species of bacteria. A preliminary sample of 35 bacteria reveals a sample mean of ¯ x = 72 hours with a standard deviation of s = 5 hours. You would like to estimate the mean lifespan for this species of bacteria to within a margin of error of 0.45 hours at a 98% level of confidence. What sample size should you gather to achieve a 0.45 hour margin of error? Round your answer up to the nearest whole number. n = bacteria

Q: The quality-control manager at a light bulb factory needs to determine whether the mean life of a…

A: Given,sample size(n)=64sample mean(x¯)=350Population standard deviation(σ)=100

Q: study of a population showed that​ males' body temperatures are approximately Normally distributed…

A: We have given that the Mean=98.3, Standard deviations=0.60

Q: Give your answer to the nearest gram.

A: From given data we have : μ=678,σ=8,n=13

Q: The average IQ in Sarah’s class is 105 with a standard deviation of 15. What is the z score of Sarah…

A:

Q: A particular fruit's weights are normally distributed, with a mean of 344 grams and a standard…

A: Given X is normal Distributed with mean µ = 344.0 and standard deviation σ = 8.0 now will use…

Q: t random, then 8% of the time, their mean weight will be greater than how many grams? Give your…

A: According to the sum, A particular fruit's weights are normally distributed, with a mean of 596…

Q: Pyramid Lake is on the Paiute Indian Reservation in Nevada. The lake is famous for cutthroat trout.…

A: Given that, Pyramid Lake is on the Paiute Indian Reservation in Nevada. The lake is famous for…

Q: A particular fruit's weights are normally distributed, with a mean of 405 grams and a standard…

A: The normal distribution is the most useful theoretical distribution for continuous variable.  For…

Q: A particular fruit's weights are normally distributed, with a mean of 649 grams and a standard…

A: Let  be the fruit's weight.Mean: Standard deviation: i.e.

Q: Pyramid Lake is on the Paiute Indian Reservation in Nevada. The lake is famous for cutthroat trout.…

A: Givenaverage length of trout caught in Pyramid Lake is μ = 19 inches.Sample size = 45sample mean = x…

Q: Pyramid Lake is on the Paiute Indian Reservation in Nevada. The lake is famous for cutthroat trout.…

A: "Since you have posted a question with multiple sub-parts, we'll solve the first three sub-parts for…

Q: If you pick 25 fruits at random, then 9% of the time, their mean weight will be greater than how…

A:

Q: ive a life expectancy of x = 71.5 years with a standard deviation of s, = 6.6 years. A sample of 6…

A: According to guidlines we can strickly answer three subspartsRural town:Sample size Sample mean…

Q: A particular fruit's weights are normally distributed, with a mean of 284 grams and a standard…

A: From the provided information, Mean (µ) = 284 grams Standard deviation (σ) = 32 grams X~N (284, 32)

Q: Pyramid Lake is on the Paiute Indian Reservation in Nevada. The lake is famous for cutthroat trout.…

A: State the hypotheses. That is, there is no evidence to conclude that average length of a trout…

Q: A particular fruit's weights are normally distributed, with a mean of 422 grams and a standard…

A: The following information has been given: The population mean is μ=422. The population standard…

Q: A study of a population showed that​ males' body temperatures are approximately Normally distributed…

A: given data normal distributionμ = 98.4σ = 0.4095th percentile = ?

Q: A particular fruit's weights are normally distributed, with a mean of 342 grams and a standard…

A: Define the Random Variable , X : Weight of a fruit So, X ~ N(342,142) Hence, Z = (X-342)/14 ~ N(0,1)

Q: A particular fruit's weights are normally distributed, with a mean of 454 grams and a standard…

A:

Q: A particular fruit's weights are normally distributed, with a mean of 777 grams and a standard…

A: given data normal distributionμ = 777σ = 9for haviest 10%, cutoff = ?

Q: obituaries in newspapers from urban and rural towns in Idaho to see if there is a difference in life…

A: Given thatRuralLarger towns(n1) = 16Sample size(n2) = 6() = 71.5sample mean () = 74.3(s1) =…