QUESTION: 151Which of the following is a valid null hypothesis?A. p 1/8B. 98C. The mean of population A is not equal to the mean of population BD. mu 110Answer: DQUESTION: 152A two-way analysis of variance has r levels for one variable and c levels for thesecond variable with 2 observations per cell. The degree of freedom for interactionisA. 2(r)(c)B. (r-1)(c-1)C. rc-1D. 2(r-1)(c-1)Answer: BQUESTION: 153One-way analysis of variance is MOST similar in its objectives toA. A test of a population mean.B. A test for equality of two sample proportions.C. A test for equality of two population means.D. A chi-square test for independence.Answer: CQUESTION: 154The difference between setting alpha equal to 0.05 and alpha equal to 0.01 inhypothesis testing is50
A. With alpha equal to 0.05, we are more willing to risk a type I error.B. With alpha equal to 0.05, we are more willing to risk a type II error.C. Alpha equal to 0.05 is a more "conservative" test of the null hypothesis.D. With alpha equal to 0.05, we are less willing to risk a type I error.Answer: AQUESTION: 155In nonparametric statistics:. No assumptions are made concerning the distribution from which the samples aretaken. The parameters of the distribution do not relate to the parameters of the sample. The sample and the distribution must have no parameters in common.A. I onlyB. IIonlyC. IIIonlyD. IIandIIIonlyAnswer: AQUESTION: 156The value for t, when making a two-tailed paired t test, with samples of 13 andalpha 0.05, isA. 1.782B. 2.179C. 2.064D. 1.711Answer: BQUESTION: 157The "least squares method" is used inA. The central limit theoremB. Calculating 251
C. Calculating2and s2D. Calculating a best fit regression line.Answer: DQUESTION: 158The primary advantage of the Latin square design, compared to the factorialdesign, is thatA. In most circumstances, it requires less data.B. It eliminates the need for interaction analysis.C. It allows higher significance levels.D. It does not require homogeneity of variance.Answer: AQUESTION: 159An experiment with two factors, in which all levels of one variable are run at eachlevel of the second variable, is called aA. One-way experiment.B. Latin square experiment.C. Factorial experiment.D. Fractional factorial experiment.Answer: CQUESTION: 160Given the data below, what is the 90% confidence interval for the variance?22, 23, 19, 17, 29, 25A. 4.21 - 99.07B. 15.32 - 28.66C. 8.27 - 79.88D. 16.87 - 56.52Answer: C52
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