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##### STATS Multiple Choice Quiz

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Question;If a stranger gives you a coin and you toss it 1,000,000 times and it lands on heads 600,000 times, what is p(Heads) for that coin?0.50000.60000.40000.0000The statistic used in the sign test measures ____.the difference between the means of the two groupsthe direction of the differences between pairs of scoresthe magnitude of the differences between pairs of scoresthe difference between the variance of the two groupsIf alpha is changed from 0.05 to 0.01, ____.the probability of a Type II error decreasesthe probability of a Type I error increasesthe error probabilities stay the same the probability we will retain a false H0 increasesthe probability we will retain a false H0 increasesThe null hypothesis which is appropriate for a directional alternative hypothesis asserts that ____.the independent variable has had no effectchance alone is responsible for the differences between conditionsthe independent variable does not have an effect in the direction predicted by H1it cannot be determined whether the independent variable has had an effectIf alpha equals 0.05 and the probability level of your experiment is 0.04, you would ____.reject the null hypothesisretain the null hypothesisaccept the null hypothesisredo the experimentQuestion 20 1 pts When the results of an experiment are nonsignificant, the proper conclusion(s) is (are) ____.;When the results of an experiment are nonsignificant, the proper conclusion(s) is (are) ____.the experiment fails to show a real effect for the independent variablechance alone is at workaccept H0accept H1If a = 0.051 tail and the obtained result has a probability of 0.01 and is in the opposite direction to that predicted by H1, we conclude by ____.rejecting H0retaining H0accepting H1accepting H0Question 22 1 pts Using the sign test, with N = 15 and a = 0.05 2-tail, if H 0 is true, the probability of making a type I error equals ____.;Using the sign test, with N = 15 and a = 0.052-tail, if H0 is true, the probability of making a type I error equals ____.0.004200.050.0352Question 23 1 pts lf we drew a random sample from an introductory psychology class, to whom could we generalize our results?;lf we drew a random sample from an introductory psychology class, to whom could we generalize our results?all of human kindthe universityall psychology studentsthe students in that introductory psychology classQuestion 24 1 pts Skip to question text.Exhibit 10-2Refer to the following hypothetical data collected using replicated measures design:Subject12345678910Pre50493716804240583121Post56503025904460713222Refer to Exhibit 10-2. What would you conclude using a = 0.012 tail?reject H0accept H0retain H0fail to reject H1Question 25 1 pts If the results of an experiment allow rejection of the null hypothesis;If the results of an experiment allow rejection of the null hypothesis,the effect of the independent variable must be large.similar results are likely to occur if the experiment is repeatedthe experiment proves that H0 is false.we cannot draw any conclusionsQuestion 26 1 pts With alpha and the effect of the independent variable held constant, as N increases ____.;With alpha and the effect of the independent variable held constant, as N increases ____.power increasesthe probability of a Type I error increasesthe probability of a Type II error increasespower decreasesQuestion 27 1 pts With alpha and N held constant, as the effect of the independent variable increases ____.;With alpha and N held constant, as the effect of the independent variable increases ____.the probability of rejecting H0 increasespower increasesthe probability of rejecting H0 remains the samethe probability of making a Type II error decreasesQuestion 28 1 pts The advantage of a powerful experiment is that ____.;The advantage of a powerful experiment is that ____.the probability of a Type I error is reduced.you are more likely to detect the real effects of the independent variable, if there are any.as power increases, alpha increases.as power increases, N increasesQuestion 29 1 pts Which of the following values of P represents the largest effect?;Which of the following values of P represents the largest effect?Preal = 0.20Preal = 0.70Preal = 0.75Pnull = 0.50Question 30 1 pts With other factors held constant, as the effect of the independent variable decreases, power will ____ and the probability of a Type II error will ____.;With other factors held constant, as the effect of the independent variable decreases, power will ____ and the probability of a Type II error will ____.decrease, increasedecrease, decreaseincrease, decreaseincrease, increaseQuestion 31 1 pts In the sign test, if H 0 is false, then P real ____.;In the sign test, if H0 is false, then Preal ____.equals 0.05equals 0.50equals 1 - 0.05does not equal 0.50Question 32 1 pts P null ____.;Pnull ____.always equals 1 - Prealnever equals 0.50always equals 0.50equals 0.50, 0.50, or 0.50, depending on H1Question 33 1 pts "State of Reality" means ____.;State of Reality" means ____.true state of affairs regarding the alpha leveltrue state of affairs regarding H1true state of affairs regarding H0true state of affairs regarding H1 and true state of affairs regarding H0Question 34 1 pts The higher the power, ____.;The higher the power, ____.the larger is Prealthe larger the N of the experimentthe more the experiment allows H0 to be rejected if it is falsethe more likely H0 is to be rejected whether H0 is true or falseQuestion 35 1 pts "Nonsignificant results" means ____.;Nonsignificant results" means ____.H0 was unable to be rejectedthe power of the experiment was too lowH1 was wrongH1 was rightQuestion 36 1 pts The sampling distribution of t depends on ____.;The sampling distribution of t depends on ____.ssdfQuestion 37 1 pts The 95% confidence interval arrived at from a particular experiment is 72-79. This means that ____.;The 95% confidence interval arrived at from a particular experiment is 72-79. This means that ____.the probability is 0.95 that falls between 72-79the probability is 0.95 that the interval 72-79 containsthe probability is 0.95 that the interval 72-79 containsthe probability is 0.95 that does not fall between 72-79Question 38 1 pts As the df increases, the t distribution ____.;As the df increases, the t distribution ____.gets more symmetricalapproaches the normal distributionstays the samebecomes more skewedQuestion 39 1 pts Skip to question text.Exhibit 13-1A researcher believes that women today weigh less than in previous years. To investigate this belief, he randomly samples 41 adult women and records their weights. The scores have a mean of 111 lbs. and a standard deviation of 12.4. A local census taken several years ago shows the mean weight of adult women was 115 lbs.Refer to Exhibit 13-1. The obtained value of the appropriate statistic for testing H0 is ____.tobt = -2.07tobt = +2.07tobt = -0.32tobt = +0.32Question 40 1 pts Skip to question text.Exhibit 13-1A researcher believes that women today weigh less than in previous years. To investigate this belief, he randomly samples 41 adult women and records their weights. The scores have a mean of 111 lbs. and a standard deviation of 12.4. A local census taken several years ago shows the mean weight of adult women was 115 lbs.Refer to Exhibit 13-1. The df for determining tcrit = ____.414039need more informationQuestion 41 1 pts Skip to question text.Exhibit 13-1A researcher believes that women today weigh less than in previous years. To investigate this belief, he randomly samples 41 adult women and records their weights. The scores have a mean of 111 lbs. and a standard deviation of 12.4. A local census taken several years ago shows the mean weight of adult women was 115 lbs.Refer to Exhibit 13-1. Using a = 0.011 tail, the appropriate critical value is ____.-1.684-2.4231.6842.423Question 42 1 pts Skip to question text.Exhibit 13-1A researcher believes that women today weigh less than in previous years. To investigate this belief, he randomly samples 41 adult women and records their weights. The scores have a mean of 111 lbs. and a standard deviation of 12.4. A local census taken several years ago shows the mean weight of adult women was 115 lbs.Refer to Exhibit 13-1. What do you conclude, using a = 0.011 tail?accept H1accept H0reject H0retain H0Question 43 1 pts The sample mean is an example of ____.;The sample mean is an example of ____.interval estimationpoint estimationconfidence pointconfidence numbersQuestion 44 1 pts Which of the following are not characteristics of the t distribution?;Which of the following are not characteristics of the t distribution?has a mean = 0.has a standard deviation greater than 1.00 for df less than infinity.varies with df.has no negative values.Question 45 1 pts The 99% confidence interval is defined as ____.;The 99% confidence interval is defined as ____.an interval such that we are 99% confident that the population value lies within the intervalan interval such that the probability is 0.99 that the interval contains the population valuean interval such that we can reject H0 at a = 0.01an interval such that we cannot reject H0 at a = 0.01

Paper#61415 | Written in 18-Jul-2015

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