Which of the following statements about hypothesis testing is false? A. AType I error is the chance that the researcher rejects the null hypothesiswhen in fact the null hypothesis is true. B. The test will never confirm thenull hypothesis, only fail to reject the null hypothesis. C. In both the one -tailed and two-tailed tests, the rejection region is one contiguous intervalon the number line. D. The rejection region is always given in units ofstandard deviations from the mean.

Hypothesis testing uses sample data to draw conclusions about the population parameter.

Answered: Which of the following statements about…

MATLAB: An Introduction with Applications

6th Edition

ISBN:9781119256830

Author:Amos Gilat

Publisher:Amos Gilat

Chapter1: Starting With Matlab

Section: Chapter Questions

Problem 1P

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In a recent year, 11th grade New York public school students taking an English test produced test scores that were normally distributed with a mean of 84 and a standard deviation of 7.2. Let x be a random variable that represents a test score. What is the lowest score that would still place a student in the top 30% of the scores? A. 85.82 B. 87.78 C. 82.52 D. 79.47
In general, men have greater income than women. So, a researcher hypothesizes that men’s occupational prestige scores on average should be significantly higher than women’s. The following table shows the OPS by gender. The researcher wants to test the hypothesis at the .05 level. The estimated standard error of the difference between means is 1.0. Is it going to be a one-tailed test, or a two-tailed test? A. One-tailed test B. Two-tailed test
Test the claim that the proportion of men who own cats is larger than 20% at the .01 significance level. The null and alternative hypothesis would be: Ho: P 0.2 Hop 0.2 Hoμ = 0.2 H₁: p0.2 H₁ : μ 0.2 (to 2 decimals) (to 2 decimals) Ho: p = 0.2 0 H₁: p < 0.2
Test the claim that the proportion of people who own cats is smaller than 30% at the 0.025 significance level. The null and alternative hypothesis would be: Ho: p=0.3 Ho: p = 0.3 Ho: p= 0.3 H₁: p 0.3 The p-value is: Ho: p = 0.3 Ho: p = 0.3 H₁: p0.3 H₁:p> 0.3 (to 2 decimals) (to 2 decimals)
Which of the following statements is true regarding the influence of a small alpha level in the context of hypothesis testing? a. A small alpha level reduces the likelihood of a Type I error. b. A small alpha level reduces the effect size. c. A small alpha level increases statistical power. d. A small alpha level increases the likelihood of detecting statistical significance.
Does color enhance creativity? Test the indicated claim about the standard deviations or variances of two populations. Subjects are given a creativity exercise on a computer with either a red background or a blue background. The scores are shown in the table. At the 0.05 significance level, test the claim that those tested with red background have creativity scores with a standard deviation equal to the standard deviation for those tested with a blue background. Red Background Blue Background n1 = 39 n2 = 34 xˉx̄1 = 19.6 xˉx̄2 = 20.5 s1 = 0.72 s2 = 0.01 What are the correct hypotheses? (Select the correct symbols and use decimal values not percentages.)H0: Select an answer x̄₂ x̄₁ μ(red) p₂ p μ₁ μ₂ σ₁ s₁² σ(red) p₁ μ p̂₁ ? ≠ < > ≤ ≥ = Select an answer μ₁ μ₂ p₁ μ(blue) p σ₂ p₂ σ(blue) s₁² x̄₁ x̄₂ μ p̂₁ H1: Select an answer μ σ₁ x̄₁ μ(red) p̂₂ p₁ s₂² p₂ μ₂ μ₁ σ(red) x̄₂ p ? ≤ ≥ ≠ > = < Select an answer μ(blue) σ(blue) p μ μ₁ p₁ x̄₂ s₁² x̄₁ σ₂ p̂₁ p₂ μ₂…
Which one of the following statements is incorrect: A. A type I error consists of rejecting the null hypothesis when it is true B. A type II error consists of accepting the null hypothesis when it is false C. You can control simultaneously both the Type I and Type II error probabilities when the sample size is fixed D. Hypothesis testing and confidence intervals are related concepts
Which outcome is expected if the null hypothesis is true for an analysis of variance? a. SSbetween should be about the same size as SStotal. b. SSbetween should be about the same size as SSwithin. c. MSbetween should be about the same size as MStotal. d. MSbetween should be about the same size as MSwithin.
Is the variance for the amount of money, in dollars, that shoppers spend on Saturdays at the mall the same as the variance for the amount of money that shoppers spend on Sundays at the mall? Saturday Sunday Saturday Sunday 75 44 62 137 18 58 0 82 150 61 124 39 94 19 50 127 62 99 31 141 73 60 118 73 89 What is the null hypothesis? What is the alternative hypothesis? What is the degrees of freedom (numerator)? What is the degrees of freedom (denominator)? What is the f statistic? What is the result? What is the p-value? Conclusion?
A P-value is A. the correlation between two variables B. the ratio between the test statistic and the standard error C. the probability of incorrectly rejecting the null hypothesis D. None of the above E. the same as the significance level
Which one of the following statements is false? The median rating for Aggressiveness is higher for the Tearless image than for the Tearful image. The standard deviations for both groups are similar. At least one quarter of the respondents in each group rated the dog’s aggressiveness as 0. The distribution of Aggressiveness is positively (right) skewed for both the Tearful and the Tearless image. No one who saw the Tearful dog rated its aggressiveness as 8 or 9.
Or the given scenario determine the type of error that was made if any.( Hint:Begin by determining the null and alternative hypothesis.) Economists considered a $3.110 as the mean price for a gallon of unleaded gasoline in the United States in a certain year. One consumer claims that the main price for a gallon of unleaded gasoline in the United States in a certain year is different from $3.110. The consumer conducts a hypothesis test and fails to reject the null hypothesis. Assume that in reality the main price for a gallon of unleaded gasoline in the United States in a certain year is $3.21. Was there an error made?if so what type?

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