The fat content in a popular snack bar follows a normal distribution in which the mean is 3.8 grams with standard deviation 0.3 grams. If a random sample of 32 snack bars is selected, what is the probability that the mean fat content of the sample will be between 3.9 and 4.4 grams?
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The fat content in a popular snack bar follows a normal distribution in which the mean is 3.8 grams with standard deviation 0.3 grams. If a random sample of 32 snack bars is selected, what is the probability that the mean fat content of the sample will b
Which of the following statements about the sampling distribution of the sample mean, x-bar, is not true? The distribution is normal regardless of the shape of the population distribution, as long as the sample size, n, is large enough. The distribution is normal regardless of the sample size, as long as the population distribution is normal. The distribution's mean is the same as the population mean. The distribution's standard deviation is smaller than the population standard deviation. All of the...
Suppose that a candy company makes a candy bar whose weight is supposed to be 50 grams, but in fact, the weight varies from bar to bar according to a normal distribution with mean μ = 50 grams and standard deviation σ = 2 grams. If the company sells the candy bars in packs of 4 bars, what can we say about the likelihood that the average weight of the bars in a randomly selected pack is 4 or more grams lighter than advertised?
Chapter 7: Problem 16 Pr (1 point) The distribution of actual weights of 8-oz chocolate bars produced by a certain machine is normal with mean 7.8 ounces and standard deviation 0.15 ounces (a) What is the probability that the average weight of a bar in a Simple Random Sample (SRS) with 3 of these chocolate bars is between 7.66 and 7.91 ounces? ANSWER (b) For a SRS 013 of these chocolate bars, what is the level L such that there...
A random variable follows the normal probability distribution with a mean of 80 and a standard deviation of 20. Determine the probability for a randomly selected value from this population in parts a through d below. a. is less than 90 b. is less than 65 c. is more than 110 d. is more than 40.
Given a random variable X follows a Normal distribution with mean 10 and standard deviation 5, what is the probability that X lies within one standard deviation of the mean?
Consider a normal distribution with mean 25 and standard deviation 5. What is the probability a value selected at random from this distribution is greater than 25? (Round your answer to two decimal places.) Assume that x has a normal distribution with the specified mean and standard deviation. Find the indicated probability. (Round your answer to four decimal places.) μ = 14.9; σ = 3.5 P(10 ≤ x ≤ 26) = Need Help? Read It Assume that x has a...
a. Consider a normal distribution with mean 20 and standard deviation 4. What is the probability a value selected at random from this distribution is greater than 20? (Round your answer to two decimal places. b. Assume that x has a normal distribution with the specified mean and standard deviation. Find the indicated probability. (Round your answer to four decimal places.) μ = 14.3; σ = 3.5 P(10 ≤ x ≤ 26) = c. Assume that x has a normal...
Consider a normal distribution with mean 35 and standard deviation 5. What is the probability a value selected at random from this distribution is greater than 35? (Round your answer to two decimal places.
The distribution of actual weights of 8-oz chocolate bars produced by a certain machine is normal with mean 8.3 ounces and standard deviation 0.2 ounces. (a) What is the probability that the average weight of a bar in a simple random sample of five of these chocolate bars is between 8.17 and 8.48 ounces? (b) For a simple random sample of five of these chocolate bars, what is the level L such that there is a 5 % chance that...
A random variable follows the normal probability distribution with a mean of 100 and a standard deviation of 10. Determine the probability for a randomly selected value from this population in parts a through d below. Click here to view page 1 of the standard normal probability table. Click here to view page 2 of the standard normal probability table. a. What is the probability that the value is less than 80? The probability that the value is less than...