Question

Suppose the numbers of a particular type of bacteria in samples of 1 millilitre (mL) of...

Suppose the numbers of a particular type of bacteria in samples of 1 millilitre (mL) of drinking water tend to be approximately normally distributed, with a mean of 81 and a standard deviation of 9. What is the probability that a given 1-mL sample will contain more than 102 bacteria? (Round your answer to four decimal places.)

Homework Answers

Know the answer?
Your Answer:

Post as a guest

Your Name:

What's your source?

Earn Coins

Coins can be redeemed for fabulous gifts.

Not the answer you're looking for?
Ask your own homework help question
Similar Questions
7. A normal random variable x has mean μ = 1.7 and standard deviation σ =...
7. A normal random variable x has mean μ = 1.7 and standard deviation σ = 0.17. Find the probabilities of these X-values. (Round your answers to four decimal places.) (a)   1.00 < X < 1.60 (b)    X > 1.39 (c)   1.25 < X < 1.50 8. Suppose the numbers of a particular type of bacteria in samples of 1 millilitre (mL) of drinking water tend to be approximately normally distributed, with a mean of 81 and a standard deviation of 8. What...
2.Suppose the life of a particular brand of calculator battery is approximately normally distributed with a...
2.Suppose the life of a particular brand of calculator battery is approximately normally distributed with a mean of 75 hours and a standard deviation of 9 hours. Complete parts a through c. a. What is the probability that a single battery randomly selected from the population will have a life between 65 and 85​hours? ​P(65≤ overbar x≤85​)= (Round to four decimal places as​ needed.)
Suppose the life of a particular brand of calculator battery is approximately normally distributed with a...
Suppose the life of a particular brand of calculator battery is approximately normally distributed with a mean of 75 hours and a standard deviation of 9 hours. Complete parts a through c. a. What is the probability that a single battery randomly selected from the population will have a life between 70 and 80 ​hours? ​P(70 < or = x overbar < or = 80​) = 0.4246 ​(Round to four decimal places as​ needed.) b. What is the probability that...
Suppose a random sample of n = 16 observations is selected from a population that is...
Suppose a random sample of n = 16 observations is selected from a population that is normally distributed with mean equal to 102 and standard deviation equal to 10. a) Give the mean and the standard deviation of the sampling distribution of the sample mean x. mean = standard deviation = b) Find the probability that x exceeds 106. (Round your answer to four decimal places.) c) Find the probability that the sample mean deviates from the population mean μ...
Suppose the life of a particular brand of calculator battery is approximately normally distributed with a...
Suppose the life of a particular brand of calculator battery is approximately normally distributed with a mean of 80 hours and a standard deviation of 11 hours. Complete parts a through c. a. What is the probability that a single battery randomly selected from the population will have a life between and hours? 75 85 P(75 ≤ x ≤ 85) = (Round to four decimal places as needed.) b. What is the probability that randomly sampled batteries from the population...
(A) The amount of tea leaves in a can from a particular production line is normally...
(A) The amount of tea leaves in a can from a particular production line is normally distributed with μ (mean) = 110 grams and σ (Standard deviation) = 5 grams. (i) What is the probability that a randomly selected can will contain less than 105 grams of tea leaves?                            (ii) If a sample of 9 cans is selected, what is the probability that the sample mean of the content “tea leaves” to be more than 115 grams?            (B) In a...
1. Suppose a population is known to be normally distributed with a mean, μ, equal to...
1. Suppose a population is known to be normally distributed with a mean, μ, equal to 116 and a standard deviation, σ, equal to 14. Approximately what percent of the population would be between 102 and 144? 2. Suppose a population is known to be normally distributed with a mean, μ, equal to 116 and a standard deviation, σ, equal to 14. Approximately what percent of the population would be between 102 and 130? 3. Suppose a population is known...
A particular variable measured on the US population is approximately normally distributed with a mean of...
A particular variable measured on the US population is approximately normally distributed with a mean of 124 and a standard deviation of 20. Consider the sampling distribution of the sample mean for samples of size 1. Enter answers rounded to three decimal places. According to the empirical rule, in 95 percent of samples the SAMPLE MEAN will be between the lower-bound of ___ and the upper-bound of ___.
At a computer manufacturing company, the actual size of a particular type of computer chips is...
At a computer manufacturing company, the actual size of a particular type of computer chips is normally distributed with a mean of 2 centimeters and a standard deviation of 0.2 centimeter. A random sample of 14 computer chips is taken. a. What is the probability that the sample mean will be between 1.99 and 2.01 centimeters? b. What is the probability that the sample mean will be below 1.95 centimeters? c. Above what value do 2.5% of the sample means...
1. The weights of 9 year old male children are normally distributed population with a mean...
1. The weights of 9 year old male children are normally distributed population with a mean of 73 pounds and a standard deviation of 12 pounds. Determine the probability that a random sample of 21 such children has an average less than 72 pounds. Round to four decimal places. 2. A normally distributed population has a mean of 80 and a standard deviation of 17. Determine the probability that a random sample of size 26 has an average greater than...
ADVERTISEMENT
Need Online Homework Help?

Get Answers For Free
Most questions answered within 1 hours.

Ask a Question
ADVERTISEMENT