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The mean number of calories per 6-ounce can of tomato paste is supposed to be 150. A weight watchers group thought that was larger than 150.
The director of an income tax agency hires four college students, who are business majors, to help prepare taxes during the busy season.
Clark Heter is an industrial engineer at Lyons Products. He would like to determine whether ther are more units produced on the night shift than on the day
Examine the data below showing the weights (in pounds) of randomly selected checked bags for an airline's flights on the same day
At a .05 level of significance, use Excel to test to see if the training program was effective
The pet-drug market is growing very rapidly. Before new pet drugs can be introduced into the market place, they must be approved by the U.S. Food
A researcher wants to determine whether the number of minutes adults spend online per day is related to gender.
The Dick Tracy Co. has developed micro-miniaturized circuitry that will enable them to produce a wristwatch-sized video-telecommunicator
It was claimed recently that more than 65% of high school students in the United States use computers for educational purposes. We wish to examine this claim
A manufacturing firm recruits 45 new sales staff, and sends each on one of two training courses. 25 attend course A, and 20 attend course B.
Hypothesis tests for the correlation coefficient and the slope of the least-squares regression line
Heights were measured for a random sample of 20 plants grown while being treated with a particular nutrient.
Determine the p-value for H0: p=.5 versus HA: p =/ (difference) .5 when n=225 and p^ =.54.
You are investigating the flight characteristics of different kinds of birds. You collect a sample of 33 European swallows (Hirundo rustica)
Classify the following as independent or dependent samples:
The weights (in grams) of four different colors of M&M candies are given below, along with the mean weight and variance of each color, and the variance
The medical literature suggest that the probability of a child contracting chickenpox (A) is 0.18; of contracting German measles (B), 0.12
Quality Associates, Inc, a consulting firm, advises its clients about sampling and statistical procedures that can be used to control their manufacturing
An estimator is consistent if, as the sample size decreases, the value of the estimator approaches the value of the parameter estimated. ____ T/F
In order to compare the characteristics of two different populations, a sample should be extracted from each population.
In this test, the variance is known. Find the p-value of the test to 4 decimals, if the obtained value of the test statistic is 2.34
An automobile manufacturer stated that it would be willing ot mass produce electrically powered cares if more than 30% of potential buyer
A sample of 64 account balances from a credit card company showed an average balance of $1,040. A previously determined population standard deviation is $200.
In order to test to see if there is any significant difference in the mean number of units produced per week by each of three production methods
The president of the American Insurance Institute wants to compare the yearly costs of auto insurance offered by two leading companies.