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Home Question Bank Math Statistics Archive 2024 December 18

Statistics Questions from Dec 18,2024

Browse the Statistics Q&A Archive for Dec 18,2024, featuring a collection of homework questions and answers from this day. Find detailed solutions to enhance your understanding.

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Does the correlation in the situation illustrate causation? Explain your reasoning. At a grocery store, there is a negative correlation between the price of cereal and number of boxes of cereal sold. The situation Select Choice illustrate causation because an increase in the price of cereal Select Choice customers to buy less cereal. \( \begin{array}{l}\text { does } \\ \text { does not }\end{array} \) lentify the variable's level of measurement as nominal, ordinal, interval, or ratio: a) Consumer Reports' ratings (Best Buy, Recommended, Not Recommended). b) Cars described as compact, midsize, and full-size. c) Colors of M\&M candies. d) Weights of M\&M candies e) types of markers (washable, permanent, etc.) f) time it takes to sing the National Anthem g) total annital income for statistics students h) body temperatures of bears in the north pole i) teachers being rated as superior, above average. average, below average, or poor 6. Determine whether the study depicts an observational study or an experiment: Two sections of statistics are tanght by the same teacher. One section uses MyStat Lab; the other section does not. At the end of the semester grades in the two sections are compared. Does the correlation in the situation illustrate causation? Explain your reasoning. The larger a person's shoe size, the higher a person's reading level. The situation Select Choice \( v \) illustrate causation because having a larger shoe size Select Choice someone to have a higher reading level. Select Choice does does not Does the correlation in the situation illustrate causation? Explain your reasoning. A class experiment shows a negative correlation between the width of a person's palm and the amount of time they spend watching television each day. The situation \( \begin{array}{l}\text { Select Chose } \\ \text { Select Choice } \\ \text { does not }\end{array} \) The local Jazz Club met 50 times last year. At each meeting there were 20 slots on the playlist, with one tune played in each slot. A careful study of the playlists for last year showed that: \( 40 \% \) of the slots were used for tunes that were not played at any other time that year. \( 45 \% \) of the slots were used for tunes that were played just twice. Half of the remaining slots were used for tunes that were played 3 times. There were only 5 other tunes played during the year, and the number of times that these were played was in the ratio \( 5: 4: 3: 2: 1 \). The number of points Jada's basketball team scored in their games have a mean of about 44 and a standard deviation of about 15.7 points. Interpret the mean and standard deviation in the context of Jada's basketball team. Jada's team scored about 15.7 points on average but the variability was large at 44 points Jada's team scored about 44 points on average but the variability was large at 15.7 points Jada's team scored about 15.7 points on average but the variability was large at 15.7 points Jada's team scored about 44 points on average but the variability was large at 44 points The data set and some summary statistics are listed. 11.5, \( 12.3,13.5,15.6,16.7,17.2,18.4,19,19.5,21.5 \) - Mean: 16.52 - Median: 16.95 - Standard Deviation: 3.11 - IQR: 5.5 How does adding 5 to each of the values in the data set impact the shape of the of variability? Standard Deviation will go up by 0.5 while the IQR will go down by 0.5 . Both of the measures of variability will go up by 0.5 . Both of the measures of variability will go down by 0.5 . Adding 5 has no impact on the measures of variakility. What effect does eliminating the lowest value, -6 , from the data set have on the mean and median? \( -6,3,3,3,3,5,6,6,8,10 \) Mean: Increases, Median: Increases Mean: Increases, Median: Decreases Mean: Decreases, Median: Decreases Mean: Decreases, Median: Increases Identify the sample. A. 476 participants B. The research team in the longitudinal study of aging C. All people D. Participants who drank two or more diet sodas a day All of the following are types of sampling techniques used in research except A. quota B. availability C. convenience D. random Please select the best answer from the choices.provided A B C D
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