QuestionAnswered step-by-stepWhich of the following is a characteristic of the normal distribution?Question 1 options:The lower half is a mirror image of the upper halfIt is symmetricalIt is not symmetricalBoth A and BQuestion 2?2 points)?nferential statistics is best defined as:Question 2 options:Making predictions about a population based on a sampleDescribing characteristics of a sampleA collection of data drawn randomly from a populationMaking predictions about a collected sampleQuestion 3?2 points)?o determine if a distribution is skewed, you should:Question 3 options:Observe if data values are creating an elongated tail at one endObserve flat the distribution appears relative to a normal curveDetermine if the distribution is based on statistical probabilities or empirical dataTest a sample data set for signs of symmetryQuestion 4?2 points)?he alternative hypothesis is best explained as:Question 4 options:A prediction that the sample statistic is falseThe test conducted for both tails of he distributionA prediction that there is no change between two valuesRejecting the null hypothesis when it should be trueQuestion 5?2 points)?he p value:Question 5 options:Measures the interval between the alternative hypothesis and the null hypothesisDetermines the size of population needed to determine significanceIs calculated using sample statistics to determine an intervalIs the probability of obtaining a statistic by chance or random errorQuestion 6?2 points)?hich statement is true about the null hypothesis?Question 6 options:The null hypothesis states there is no difference between a population value and a sample value.The null hypothesis states there is a difference between a population value and a sample value.The null hypothesis is a determination about a sample value.The null hypothesis is a determination about a population value.Question 7?2 points)?he type of error that is made when the null hypothesis is incorrectly rejected:Question 7 options:Type I errorType II errorType III errorType IV errorQuestion 8?2 points)?avedIf you reject the null hypothesis when you should not have, you have made a:Question 8 options:Type I errorType II errorType III errorType IV errorQuestion 9?2 points)? two-tailed test considers:Question 9 options:One tail of the distributionBoth tails of the distributionBoth the height and width of a distributionOne tail and either the height or width of a distributionQuestion 10?2 points)?he group from which data are collected is called a:Question 10 options:sampleconfidence intervalpopulationhypothesisQuestion 11?2 points)?he bell curve is also known as:Question 11 options:A unimodal distributionA normal distributionA Gaussian distributionAll of the aboveQuestion 12?2 points)?he degree to which a distribution deviates from normal is best called:Question 12 options:SkewAsymptoticRawErrorQuestion 13?2 points)?he central limit theorem states that:Question 13 options:As the sample size increases, the sampling distribution will look less normal.The sample mean will increase in standard deviation.For a randomly selected sample that is large enough, the distribution of sample means will be normally distributed regardless if the population distribution is normal.Small sample sizes will always appear as a normal distribution when properly randomized.Question 14?2 points)?hat does the central limit theorem predict about the shape of the distribution of sample means?Question 14 options:The distribution will be approximately normal when the sample size is large.The distribution will be approximately normal when the sample size is small.The distribution will be skewed when the sample size is large.The distribution will be skewed when the sample size is small.Question 15?2 points)?egrees of freedom:Question 15 options:Measures the statistical relationship between the normal distribution and the t-distributionPredict that as a sample size increases, it will appear as a normal distributionPredict distributions by plotting subsequent sample sizesAre directly related to sample size and identify which t distribution is neededQuestion 16?2 points)?he standard error is best defined as:Question 16 options:A measurement of bias calculated directly from the central limit theoremThe true value of the meanThe standard deviation of the sampling distributionA theoretical distribution from a population sampleQuestion 17?2 points)?hich is the best example of a sample?Question 17 options:A selection of letters from the alphabetA cup of water taken from the refrigeratorAsking the name of every person in your officeAdding the ages of every member of your familyQuestion 18?2 points)?hich is best described as inferential statistics?Question 18 options:Determining the p-value of a statisticCalculating the mean of a sampleCollecting a sample from a populationDetermining the range for a data setQuestion 19?2 points)?hich is best described as descriptive statistics?Question 19 options:Determining the p-value of a statisticUsing the t-distribution to compare sample meansCalculating the mean, median or modeStating the null and alternative hypothesesQuestion 20?2 points)?etermining whether something you observe in the sample is represented in the larger population is a part of:Question 20 options:The Central Limit TheoremThe alternative hypothesisDescriptive statisticsInferential statisticsQuestion 21?2 points)?he standard normal curve is sometimes called the z-curve. Which of the following is the best explanation?Question 21 options:The area under the curve is equal to 0.5.The area under the curve is equal to 1.When a normal curve is standardized, the standardized variables are labeled z.The curve reflects three dimensions and the z curve is named for the added dimension.Question 22?2 points)? distribution with two modes would be called:Question 22 options:UnimodalBimodalMultimodalSymmetrical?uestion 23?2 points)?hich of the following graphs is the best representation of skew?Question 23 options:Question 24?2 points)?hich of the following explanations best describes the confidence interval?Question 24 options:A data interval that best explains the data set.An interval of data that has a specific probability of calculating the sampling error.An interval of numbers that contains the actual population value as calculated to a specific level of confidence.A group of numbers from which the sample data are calculated to a specific level of confidence.Question 25?2 points)? researcher is studying a new medication and wants to conduct a hypothesis test. She is concerned with a change of pulse rate in the sample of patients taking this medication. If the average population pulse rate is 80 beats per minute, which of the following statements best represents a null hypothesis?Question 25 options:The sample average is not equal to 80The sample average is equal to 80.The sample average is at least double the population average.The sample average is less than the population average.BusinessManagementHuman Resource ManagementHS 312Share Question
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