Question

2) Populations versus samples. For each statement, answer with either population, sample, or both. A) The complete set of information. B) A portion, not all, of the information. C) Has the potential to be biased or misleading. D) Measured or summarized with parameters. E) Measured or summarized with statistics. 3) Descriptive versus inferential statistics. For each statement, answer with either descriptive or inferential statistics. A) Facts about samples. B) Educated guesses about populations based on samples. C) The world population is predicted to be 8 billion people in 2025. D) Last summer, my 251 had 20 students and only 1 failed (or 5%). E) It is estimated that pet owners spent a total of 14 billion dollars on veterinarian care last year. 4) Defining the levels of measurement. For each statement, answer with either ratio, interval, ordinal, or nominal. A) Data falls into categories but with norank or ordering. B) Data can be compared with differences and ratios because the scale has a meaningful zero. C) Data falls into 3 or more categories that have a rank or ordering, but precise differences between measurements cannot be determined. D) Data is ranked and differences can be determined, but the scale doesn't have a meaningful zero, so ratios do not apply 5) Applying the levels of measurement. For each statement,answer with either ratio, interval,. A) Time of day (either AM or PM) B) Time of day (on a 24-hr clock) C) Time of day (either morning, afternoon, evening, night) D) Time of day (on a 12-hr clock) Plasmas have higher kinetic energy than gases Gases have higher kinetic enerzy than liquids Liquids have higher kinetic energy than solids E) State of matter (solid, liquid, gas, plasma) P) Temperature (Celsius) G) Temperature (Kelvin) 6) Quantitative versus qualitative variables. For each statement, answer with either quantitative or qualitative variables. A) Numerical in nature, often summarized using averages. B) Categorical in nature, often summarized using percentages or proportions. C) Weight (in grams), time (in seconds), number of siblings, etc. D) Hair color, gender, nationality, etc. Pg. 1 MATH 251 Blackboard Assignment 1 7) Applying experimental variables. York University in Toronto, Canada stated that people who had suffered from fibromyalgia were able to reduce their pain by participating in twice-weekly yoga. Determine whether each of the following is the independent variable, the dependent variable, or possible confounding variable. A) Fibromyalgia pain. B) Twice-weekly yoga. C) Medications. D) Age. 8) Experiments versus studies. For each statement, answer with either designed experiment or observational study. A) The researcher controls or manipulates a variable and tries to determine how the manipulation influences another variable. B) The researcher observes what is happening and tries to draw conclusions based on the observations C) Can determine causation if properly done. D) Can determine an association but not causation. E) Statistically speaking, these are more reliable/valid. 9) Defining sampling methods. For each statement, answer with either simple-random, systematic, cluster, stratified, or convenience A) You group the population and collect a simple-random sample from every group B) The ideal sample (i.e. most reliable). Every member has an equal chance of being sampled C) The least reliable sample, it is not random and has the highest potential of bias. D) You group the population and sample every member of randomly chosen groups. E) You randomly choose a starting member and then sample every k member. 10) Identifying the sampling method. For each statement, answer with either simple-random, systematic, cluster, stratified, or convenience. A) A group of students ask every 10th person from the school's student registry about how they feel about the parking on campus starting with the 4th person who they chose randomly. B) Levodopa is a drug used to help control the symptoms of Parkinson's disease. Doctors wish to choose 80 out of 200 patients with Parkinson's disease to test the effectiveness of Levodopa. They assign each patient a number from 1 to 200. They then choose 80 nubers using a random number table. C) A chemist divides a group of flasks of acids and bases into 7 categories based on pH. She then takes a simple random sample from each of the 7 categories in order to use in an experiment. D) A florist sells roses by the dozen and currently has 120 roses separated in 10 different bunches. She randomly picks 2 bunches and use the 24 roses to determine the average number of petals per rose. E) A student wants to estimate the percentage of her friends that vape. She posts a poll on Twitter and asks her friends to respond. 11) Histograms are very important to identify the 'shape' of a quantitative dataset. A) Which histogram would be described as fairly bell-shaped? B) Which histogram would be described as fairly uniform? C) Which histogram would be described as skewed to the right or skewed positively? 12) Some graphs are appropriate for qualitative data while others are appropriate for quantitative data. For each of the A) Pie chart B) Histogram C) Stem-and-leaf plot D) Frequency polygorn E) Pareto F) Cumulative frequency distribution 13) Explain why the following bar graph is misleading and how you would fix it. Effectivepess of Allergy Medicines 30.7 0.5 за 4 0.3 Pellaway Happajoy 14) Explain why the following bar graph is misleading and how you would fix it. (Hint: Section. 2.3 #25) $3.00 52.50 $2 00 $1 50 51 00 MILK $1 00 0 10 a 1958 Fal 2011

Answer 1

I can only answer 1 question at a time so I am solving question 2).

2)

A) population

B) sample

C) sample

D) population

E) sample

Please do rate me and mention doubts in the comments section.