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Is the average cross-sectional area of the lumen of coronary arteries for men, age's 40-59, less than 31.5 percent of the total arterial cross section.
In August 1976, Tuberculosis was diagnosed in a high school student (INDEX CASE) in Corinth Mississippi. Subsequent laboratory studies revealed that the student's disease was caught by drug resistan
A study was conducted to investigate drinking problems among college students. In 1983, a group of students were asked whether they had ever driven an automobile as drinking. In 1987 after legal dri
Self-reported injuries between left handed and right handed people were compared in a survey of 1896 college students in British Columbia, Canada. 93 of 180 left handed students reported at least on
Do data indicate a significant difference between the frequency distributions for male and females? Test at the .05 level of significance and describe the difference.
Langweita, Izakovic, and Wyler (2005) reported that self-hypnosis can significantly reduce hay fever symptoms. Patients with moderate to severe allergic reaction were trained to focus their minds on
Based upon this sample information find out what percent of variation in starting salaries is stated by GPA, and determine an equation that would predict salary from the GPA. Provide the scatter plo
The same researcher also recorded the gender of each student watching a men's basketball game in college gym and found a total of 83 females and 97 males. Is the gender distribution for basketball f
Finally, find out if there is any correlation between how well the mentor communicates with new employee with how comfortable the new employee is on the job.
Hypothesis testing is a scientific process in which a question, problem, or opportunity is answered. There is a five-step procedure that is used to reveal a response statistically. This process will
Conduct appropriate statistical test to see if there're any differences between the groups and find out if vitamin C is effective in treatment of colds.
Evolutionary theories often emphasize that humans have adapted to their physical environment. One such theory hypothesizes that people must spontaneously follow a 24-hour cycle of sleeping and
Open the data file on your excel file AirlinePassengers. Point out the level of data (nominal, ordinal, ratio, or interval) measurement for each variable in data set. Notice t
Neonates gain (on average) 100 grams/wk in the first 4 weeks. A sample of 25 infants given a new nutrition formula gained 112 grams/week (on average) with the standard deviation=30 grams. Is this st
A research report summarizes the results of the hypothesis test by stating,"z = 2.13, p < .05." According to this report.
The weight of football players is normally distributed with mean of 200 pounds and standard deviation of 25 pounds. The probability of player weighing more than 241.25 pounds is
The weight of foot ball players is noramlly distributed with the mean of 200 pounds and standard deviation of 25 pounds. Find out the minimum weight of middle 95% of the players?
The following probability distribution has been assessed for the number of accidents which take place in Midwestern city each day:
Which of the following samples is least likely to be obtained for the given problem.
A manufacturing process manufactures items whose weights are noramlly distributed. It is known that 22.57% of all the items produced weigh between 100 grams up to the mean and 49.18% weigh from th e
A random sample is selected from a population with u = 80 and 0 = 10. To make sure a standard error of 2 points or less, the sample size should be at least ________ = 5.
A nation job placement company is interested in the developing model that may be employed to describe the variation in starting salaries for college graduates based upon the college GPA.
Let p1=100 and n1=500; and p2=200 with n2=500. Test whether there is a statistical difference between the two proportions at the 5% significance level.
The mean return for a random sample of 33 mutual funds is 14.93 percent with a standard deviation of 9.57.
The sample mean is 50, the t-critical value is 1.96, and the standard error of the sample mean is 2.