Every year the ETS administers the Major Field Test in Psychology (MFTP) to graduating psychology majors. In 2003 Baylor University wondered how its students compared to the national average...

Every year the ETS administers the Major Field Test in Psychology (MFTP) to graduating psychology majors. In 2003 Baylor University wondered how its students compared to the national average...

The Russel Caddel Beef Company wants to estimate the average weight of a steer in its current herd. A random sample of 51 cows showed the mean weight to be 400 lbs. The population standard deviation...

Suppose you buy a new car whose advertised mileage is 22 miles per gallon (mpg). After driving your car for several months, you find that its mileage is 17.4 mpg. You telephone the manufacturer and...

The results of a test are normally distributed with a mean of 67.5 and a standard deviation of 15 ..

The results of a test are normally distributed with a mean of 67.5 and a standard deviation of 15. If a score is selected at random, then the probability that the score is between 75 and 90 is?

If the result of a test were normally distributed with a mean of 70 and a standard deviation of 10, what would the area below the probability density function of 40 between 50. If the result of...

Jeff is producing an outdoor concert. He estimates that he will make 3200 dollars if it does not rain, and make 950 dollars if it does rain. The local weather station (which we'll assume is accurate...

The time to complete a standardized exam is approximately normal distributed with a mean of 100 minutes and a standard deviation of 15 minutes. The time, to the nearest minute, that should be given...

Light vehicles sold in a country must emit an average of no more than 0.11 grams per mile (g/mi) of nitrogen oxides (NOX) after 50,000 or fewer miles of driving. NOX emissions after 50,000 or fewer...

A population has μ=100 and σ=20 Find the z-score that corresponds to each of the following sample means obtained from this population M = 102 for a sample of n = 100 scores....

A soft drink machine can be regulated so that it discharges an average of "mean" oz. per cup. If the ounces of fill are normally distributed with a standard deviation of 0.3oz. What value...

The length of a time that the parts of a Roll watch continue to work is normally distributed. The mean length of time that the parts work is 10 years, with a standard deviation of 2 years. If the...

given an approximately normal distribution what percentage of all values are within 1 standard deviation

51% of men consider themselves professional baseball fans. You randomly select 10 men and ask each if he considers himself a professional baseball fan. Find the probability that the number who consider...

A farmer has 110 lbs of apples and 70 lbs of potatoes for sale. The market price for apples (per pound) each day is a random variable with a mean of 0.50 dollars and a standard deviation of 0.20 dollars...

Express the confidence interval 0.5550.555less than<pless than<0.7770.777 in the form ModifyingAbove p with caret plus or minus Upper Ep±E.

The bass in Clear Lake have weights that are normally distributed with a mean of 2.3 pounds and a standard deviation of 0.8 pounds. What percentage of all randomly caught groups of 3 bass...

You have been hired to estimate the mean of how much water adults drink per day. You obtain a sample of 85 adults. In this sample, the mean amount of water consumed in a day is 893 mL with a standard...

Suppose you were told that at a workplace, about 40% of the workers are smokers. A small study from the same workplace indicates that out of 20 subjects that were asked, 2 of them are smoker. Do you...

There are 4 red candies and 6 blue ones in a box. If a child randomly takes 3 candies one by one, find the probability that the first is red and the last two are blue. NEED HELP ASAP...

A random sample is obtained from a population with μ=100 and σ=20 Calculate the standard error for a sample of size n = 4 Calculate the standard error for a sample of size n = 16 Calculate the standard...