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1. At the certain university, average cost of books per student was 400.00 last semester. In the sample of 40 students this semsester, their average cost was 340.00 with standard deviation of 80.00. Dean of students thinks that costs are greater this semester. Determine the test value for this hypothesis
A) 15.00B) 2.37C) 0.38D) 0.75
2. Medical researcher is interested in whether patient's left arms or right arms are longer. if 14 patients participate in this study (so that n left arms and n right arms are estimated), how many degrees of freedom must researcher use in her t-test critical value suppose that variances are equal?
A) 13B) 27C) 14D)26
Based on p=.60, probability that a randomly selected homeowners will say no to newspaper subscription.
Perform the trend analysis of Pf with incrementally increasing number of the simulation cycles, and calculate the statistical uncertainty in the estimate expressed as the coefficient of variation.
Children per family for certain community from census data. Recognize random variable of interest, find out whether is a discrete or continuos, and write its possible values.
What sample size would be needed to obtain an error of ±10 square millimeters with 99 percent confidence?
Population of consumers where 30% of them favored a new product and 70% of them disliked it. If 20 persons are sampled, what are the probabilities of finding: Binomial
Let the random variable X denote the number of emergency calls received by the campus police office each day. The probability mass function of X is given by:
Has the average community level of suspended particles for the month of August exceeded 30u/m3?
What is the expected value of M and the standard error of M for a sample of n=4 scores? What is the expected value of M and the standard error of M for a sample of n = 25 scores?
A cereal manufacturer seeks to test their newest product against a competitor's. A group of 100 children was asked to evaluate each brand, and then to express a preference. To guard against bias, neither the children, nor the technicians serving t..
Such things as historical documents, newspaper reports, TV and radio broadcasts, when used in research, represents
Roger has read a report that the weights of adult mail Siberian tigers have a distribution which is approximately normal with mean μ = 390 lb and σ = 65 lb
According to the study, the mean age of a self-employed individual is 46.6 years with a standard deviation of 10.8 years.
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