Seventy million pounds of trout are grown in the U.S. every year. Farm-raised trout contain an average of 32 grams of fat per pound, with a standard deviation of 7 grams of fat per pound. A random sample of 35 farm-raised trout is selected. The mean fat content for the sample is 30.5 grams per pound. Find the probability of observing a sample mean of 30.5 grams of fat per pound or less in a random sample of 35 farm-raised trout. Carry your intermediate computations to at least four decimal places. Round your answer to at least three decimal places.

The weights of the guinea pigs in a laboratory are normally distributed with a mean weight of 2.1 pounds and a standard deviation of 0.8. What is the probability that a randomly selected guinea pig would weigh above 2.3 pounds?

A certain prescription medicine is supposed to contain an average of 250 parts per million (ppm) of a certain chemical. If the concentration is higher than this, the drug may cause harmful side effects; if it is lower, the drug may be ineffective. The manufacturer runs a check to see if the mean concentration in a large shipment conforms to the target level of 250 ppm or not. A simple random sample of 100 portions is tested, and the sample mean concentration is found to be 247 ppm. The sample concentration standard deviation is s = 12 ppm. What are the appropriate null and alternative hypotheses? Group of answer choices H 0:  x̄ = 250 vs. H a:  x̄ < 250 H 0:  x̄ = 250 vs. H a:  x̄ ≠ 250 H 0:  x̄ = 250 vs. H a:  x̄ > 250 H 0: μ = 250 vs. H a:μ < 250 H 0: μ = 250 vs. H a: μ ≠ 250 H 0: μ = 250 vs. H a: μ > 250

Seventy million pounds of trout are grown in the U.S. every year. Farm-raised trout contain an average (mean) of 32 grams of fat per pound, with a standard deviation of 8 grams of fat per pound. A random sample of 40 farm-raised trout is selected. The mean fat content for the sample is 30.2 grams per pound. Find the probability of observing a sample mean of 30.2 grams of fat per pound or less in a random sample of 40 farm-raised trout. Carry your intermediate computations to at least four decimal places. Round your answer to at least three decimal places. Check esc 23 2$ 5 2 e r t y tab

An engineer is going to redesign an ejection seat for an airplane. The seat was designed for pilots weighing between  140lb and  181lb. The new population of pilots has normally distributed weights with a mean of 150 lb and a standard deviation of 34.8 lb.

Seventy million pounds of trout are grown in the U.S. every year. Farm-raised trout contain an average (mean) of 32 grams of fat per pound, with a standard deviation of 8 grams of fat per pound. A random sample of 34 farm-raised trout is selected. The mean fat content for the sample is 31.8 grams per pound.   Find the probability of observing a sample mean of 31.8 grams of fat per pound or less in a random sample of 34 farm-raised trout.Carry your intermediate computations to at least four decimal places. Round your answer to at least three decimal places.

An engineer is going to redesign an ejection seat for an airplane. The seat was designed for pilots weighing between 130 lb and 181 lb. The new population of pilots has normally distributed weights with a mean of 136 lband a standard deviation of 29.6 lb. b. If 38 different pilots are randomly​ selected, find the probability that their mean weight is between 130 lb and 181 lb.

The diameter of a brand of Ping-Pong balls is approximately normally distributed, with a mean of 1.30 inchesand a standard deviation of 0.04 inch. If you select a random sample of 16 Ping-Pong balls, a. What is the sampling distribution of the mean?

According to Current Population Reports, the population distribution of number of years of education for self-employed individuals in the United States has a mean of 13.6 and a standard deviation of 3.0.  Find the mean and standard error of the sampling distribution of ȳ for a random sample of  9 residents.

The national coffee assosciation reported that 62% of adults drink coffee daily. A random sample of 309 adults is selected. find the standard deviation