math 1280 (MATH 1280)

1 MATH 1280 Milestone 3_Introduction to Statistics (2020) – University of the People Tracie spins the four-colored spinner shown below. She records the total number of times the spinner lands on the color red and constructs a graph to visualize her results. Which of the following statements is TRUE? • If Tracie spins the spinner 1,000 times, it would land on red close to 250 times. • If Tracie spins the spinner 1,000 times, the relative frequency of it landing on red will remain...

1 MATH 1280 Milestone 1_Introduction to Statistics (2020) – University of the People The administrator of a hospital conducted a survey among patients in the cardiology wing to determine service levels of the nursing staff in the hospital. Which of the following explains how the results of the survey could be biased? • The sample does not include the doctors of the hospital. • The sample does not include all the patients in the hospital. • The sample does not include the boar...

MATH 1280 Graded Exam Unit 8 test questions only (2020) – University of the people Information Flag question Information text Recall that the population average of the heights in the file "" is μ = 170.035. Using simulations we found that the probability of the sample average of the height falling within 1 centimeter of the population average is approximately equal to 0.626. From the simulations we also got that the standard deviation of the sample average is (approximately) equal to...

MATH 1280 Self - Quiz Unit 2– University of the People Information text The next two questions refer to the following relative frequency table on hurricanes that have made direct hits on the U.S. between 1851 and 2004. Hurricanes are given a strength category rating based on the minimum wind speed generated by the storm. Frequency of Hurricane Direct Hits Category # Direct Hits Relative Freq. Cum. Relative Freq. 1 0.39930 0.3993 2 72 3 0.2601 4 0.0659 5 0.0110 1.0000 Question 1 Co...

1 MATH 1280 Practice Milestone UNIT 1 Introduction to Statistics (2020) – University of the People Which of the following data types will be continuous? • Number of cars produced by a car company in a year • Number of skyscrapers in a city • Number of correct answers on a ten-question true/false test • Weight of a baby whale RATIONALE For data to be continuous, it means it can take on any value inside of an interval. Since the weight of a baby whale can take on any numeri...

1 MATH 1280 Milestone 4_Introduction to Statistics (2020) – University of the People Which statement about correlation is FALSE? • The correlation of a data set can be positive, negative, or 0. • Correlation between the variables of the data set can be measured. • Correlation is the degree to which the two variables of a data set resemble each other. • Correlation is used to define the variables of only non-linearly related data sets. RATIONALE Recall that correlation is ...

MATH 1280 Self-Quiz Unit 7 (100%) – University of the People Grade 10.00 out of 10.00 (100%) Information text Recall that the population average of the heights in the file "" is μ = 170.035. Using simulation it can be shown that the probability of the sample average of the height falling within 2 centimeter of the population average is approximately equal to 0.925. From the simulations we also got that the standard deviation of the sample average is (approximately) equal to 1.122. In the...

MATH 1280 Self-Quiz Unit 3 (100%) – University of the People Grade 10.00 out of 10.00 (100%) Question 1 Correct Question text In Figure A you will find box plots for three sets of data. In Figure B are the histograms for the same sets of data, but in a different order. Associate each box plot with its relative histogram. Figure A: Figure B: