"A class of 50 students scored an average of a 73 on the final exam. Given the standard deviation is 5, what is the value of t for a student who scored a 67?"Question 16Answera.-8.49b.-16.97c.-17.5d.-7.07Clear my choiceQuestion 17Not yet answeredMarked out of 1.00Flag questionTipsQuestion textTI=83 graphing calculators are more useful in which of the following subject functions?Question 17Answera.Statistics, trigonometry, and algebrab.Only statistics and algebrac.Only statisticsd.Only statistics and trigonometryClear my choiceQuestion 18Not yet answeredMarked out of 1.00Flag questionTipsQuestion textWhat is an outlier?Question 18Answera.an observation that may indicate that the distribution is skewed and that one should be very cautious in using tools or intuitions that assume a normal distributionb.an observation that is numerically distant from the rest of the datac.an observation that is often indicative either of measurement error or of the population having a heavy-tailed distributiond.all of these answersClear my choiceQuestion 19Not yet answeredMarked out of 1.00Flag questionTipsQuestion textWhen is the root-mean-square especially useful?Question 19Answera.when a data set includes both positive and negative numbersb.when a data set includes both discrete and continuous valuesc.when a data set includes exclusively positive numbersd.when a data set includes exclusively negative numbersClear my choiceQuestion 20Not yet answeredMarked out of 1.00Flag questionTipsQuestion textLooking at a scatter plot and seeing how close the points are to a line helps to determine what about the statistical relationship?Question 20Answera.verticalityb.strengthc.horizontalityd.direction
Question
"A class of 50 students scored an average of a 73 on the final exam. Given the standard deviation is 5, what is the value of t for a student who scored a 67?"Question 16Answera.-8.49b.-16.97c.-17.5d.-7.07Clear my choiceQuestion 17Not yet answeredMarked out of 1.00Flag questionTipsQuestion textTI=83 graphing calculators are more useful in which of the following subject functions?Question 17Answera.Statistics, trigonometry, and algebrab.Only statistics and algebrac.Only statisticsd.Only statistics and trigonometryClear my choiceQuestion 18Not yet answeredMarked out of 1.00Flag questionTipsQuestion textWhat is an outlier?Question 18Answera.an observation that may indicate that the distribution is skewed and that one should be very cautious in using tools or intuitions that assume a normal distributionb.an observation that is numerically distant from the rest of the datac.an observation that is often indicative either of measurement error or of the population having a heavy-tailed distributiond.all of these answersClear my choiceQuestion 19Not yet answeredMarked out of 1.00Flag questionTipsQuestion textWhen is the root-mean-square especially useful?Question 19Answera.when a data set includes both positive and negative numbersb.when a data set includes both discrete and continuous valuesc.when a data set includes exclusively positive numbersd.when a data set includes exclusively negative numbersClear my choiceQuestion 20Not yet answeredMarked out of 1.00Flag questionTipsQuestion textLooking at a scatter plot and seeing how close the points are to a line helps to determine what about the statistical relationship?Question 20Answera.verticalityb.strengthc.horizontalityd.direction
Solution
Question 16: To find the value of t for a student who scored a 67, we first need to calculate the z-score, which is the number of standard deviations a data point is from the mean. The formula for the z-score is (X - μ) / σ, where X is the data point, μ is the mean, and σ is the standard deviation. In this case, X = 67, μ = 73, and σ = 5. So, the z-score is (67 - 73) / 5 = -1.2. The t-value is the same as the z-score when the sample size is large, so the t-value is -1.2. None of the provided options match this calculation.
Question 17: TI=83 graphing calculators are useful in a variety of subjects, including statistics, trigonometry, and algebra. So, the answer is a. Statistics, trigonometry, and algebra.
Question 18: An outlier is an observation that is numerically distant from the rest of the data, may indicate that the distribution is skewed and that one should be very cautious in using tools or intuitions that assume a normal distribution, and is often indicative either of measurement error or of the population having a heavy-tailed distribution. So, the answer is d. all of these answers.
Question 19: The root-mean-square is especially useful when a data set includes both positive and negative numbers. So, the answer is a. when a data set includes both positive and negative numbers.
Question 20: Looking at a scatter plot and seeing how close the points are to a line helps to determine the strength of the statistical relationship. So, the answer is b. strength.
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