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Consider following table: Make a PERT network. Draw as shown in notes.
A researcher is investing the effectiveness of new study-skill training program for elementary school children. A sample of n = 25 third-grade children is selected to participate in the program and
Find out the completion time and standard deviation (σ) for project roundoff the standard deviation to the nearest hundredth: two decimal places.
Hypothesis testing using critical value and p-value.
The value of the Z score in a hypothesis test is influenced by a variety of factors. Assuming that all other variables are held constant.
Find out the critical value zc necessary to form confidence interval at the level of confidence shown below
Injuries and Motorcycle Helmet Colour A case-control (or retrospective) study was conducted to investigate a relationship between the colours of helmets worn by motorcycle drivers and whether they a
A triage system has been proposed for the ER stated in Problem 5 above. As mentioned, 50 patients per hour arrive at the ER. Under the proposed triage plan, patients who're entering will be register
At 95% confidence using the critical value approach, determine if the proportion of females in the company is significantly less than 50%.
Choo Paper Company makes various types of paper products. One of their products is a 30 mils thick paper. In order to ensure that the thickness of the paper meets the 30 mils specification, random c
In the random sample of 46 bolts, the mean length was 1.28 inches and standard deviation was 0.07 inch. Employ a normal distribution or a t- distribution to develop a 99% confidence interval for the
A sample of 64 provides a sample mean of 13 and a sample standard deviation of 4.
Automobiles manufactured by the Efficiency Company have been averaging 42 miles per gallon of gasoline in highway driving.
Determine the p-value, and at 95 percent confidence, test the hypotheses.
A student believes that no more than 20% (i.e., 20%) of the students who finish a statistics course get an A. A random sample of 100 students was taken. Twenty-four percent of the students in the sa
What do you mean by the value of test statistic. What is the value of test statistic.
At the .01 level of significance, is the mean grade of the female students higher than that of males.
Employer A states the average number of days missed in a year by each staff member is 4.0. Office personnel at random sampled a portion of their attendance records to find if this claim was ac
The Rocky Mountain district sales manager of JCM, Inc., a college book publishing company, claims that each of his sales representatives makes 40 calls on professors per week.
A sample of 40 observations is selected from one approximately normal population. The sample mean is 102 and sample standard deviation is 5.
Metro Real Estate Association is prepare a pamphlet that they feel might be of interest to prospective homebuyers in the Middletown and Brockton areas of the city.
In a recent national survey, the mean weekly allowance for a nine-year-old child from his or her parents was reported to be $3.65. A random sample of 45 nine year olds in northwestern Ohio rev
According to Information Please Almanac. 80% of adult smokers started smoking before turning 18 years of age.
A 2003 Study found that medical students mean number of hours worked in the week is 81.7. Assume the number of hours worked per week by medical residents is approximately normally distributed
The quality control process at the manufacturing plant needs that each lot of finished units be sampled for defective items.