HintonEDUR8131Test1

.docx
Desiree T. Hinton EDUR 8131: Test 1 Due: 2/15/2021 Instructions: Submit test responses as a PDF attachment in Folio Dropbox. Dropbox submission instructions: 1. Describe the following terms as simply as possible in your own words (do not explain how they are used, rather explain the concept each represents; 1 point each, 3 points total): a. The mean subtracted from a raw score b. Incorrectly rejecting a true null 2. Write a directional hypothesis for the following variables: IV is presence of a high-powered subwoofer in one's car (present vs. not present) and the DV is level of hearing loss as measured in decibels (dB HL; which ranges from a low of 0 dB to a severe level of 91 or more). This must be a written hypothesis, not symbolic hypothesis (e.g., do not present the hypothesis in the form of Ho: µ1 = µ2). (2 points) 3. Identify each of the following as either qualitative or quantitative variables (1 point each; 3 points total): a. One's decision to buy a car, truck, or van b. Number of shots made at the free-throw line in basketball when attempting 20 shots c. Type of credit card (e.g., Visa, Mastercard, Discover Card, American Express, etc.) 4. Indicate whether the following are nominal, ordinal, interval, or ratio variables (1 point each; 4 points total): a. Whether one has a master's degree (yes vs. no) b. Number of shots made at the free-throw line in basketball when attempting 20 shots ratio c. Kindergartner's family composition (mother-father, mother only, father only, etc.) nominal d. Percentage of votes received by a candidate 5. Below are my heart rate readings recorded shortly after rising each morning for two weeks: 52, 51, 47, 42, 46, 46, 46, 50, 49, 52, 67, 50, 45, 46 For these data, present the following information (while you may use SPSS or other software to calculate the following, do not copy and paste SPSS or other software output except for i and j; instead report results you obtained by the letter identification below so I can quickly locate your response; 1 point each except for i and j which are worth 2 points each; 12 points total): (a) Mean 49.214
(b) Median 48 (c) Mode 46 (d) Variance 34.77 (e) Standard Deviation 5.899 (f) Range 25 (g) What is the percentile rank for a pulse of 46 for these data? (h) What is the z score for a pulse of 42? (i) Ungrouped frequency display (include frequency, relative frequency, and cumulative relative frequency) (j) Stem-and-leaf display 6. I am planning a backpacking trip to Glacier National Park in Montana. Below are graphical displays showing average temperatures (both average high and low) for each month and average precipitation for each month in West Glacier, MT. (4 points) (a) Which month would provide the warmest temperature, on average, in West Glacier? (b) Which month would provide the coldest temperature, on average, in West Glacier? (c) Which would be the driest month, on average, in West Glacier? (d) Which would be the wettest month, on average, in West Glacier? The figures follow on the next page. Sourcehttp://www.weather.com/weather/wxclimatology/monthly/graph/USMT0352 (Figure 9a) Average Monthly Temperature in West Glacier, MT. 01/14/2021 4 (Figure 9b) Average Monthly Percipitation in West Glacier, MT. 7. Quotation: "...a large-scale 2013 study in the Journal of the National Cancer Institute which found "no statistically significant relationship between lung cancer and exposure to passive smoke." Source: http://www.foxnews.com/politics/2014/04/09/climate-change-fiercely-debated-with-widely- divergent-facts/
What type of error, if any, could have been made in hypothesis testing for this study? If an error could be made, what is the probability of this error (i.e., alpha, beta, 1-alpha, 1-beta, or something else)? (2 points) 8. Quotation: "Sean Trende at RealClearPolitics wrote in January that there is a statistically significant relationship between Obama's job approval and Democratic votes in Senate elections." Source: http://rt.com/usa/155720-obama-approval-lowest-of-term/ What type of error, if any, could have been made in hypothesis testing for this study? If an error could be made, what is the probability of this error (i.e., alpha, beta, 1-alpha, 1-beta, or something else)? (2 points) 9. Across the nation students take GRE tests for admission decisions at graduate schools. Usually these tests consist of three sub-tests (verbal, quantitative, logical), and each sub-test typically has an overall mean of 500 and standard deviation of 100. Additionally, the distribution of scores for each sub-test is often closely approximated by the normal curve. Answer the following questions for the verbal portion of the GRE. (1 point each; 2 points total). (a) What percentage of students will score 339 or better on the verbal portion of the GRE? (b) What is the percentile rank for a student with a score of 518? 10. Assume the mean score on this EDUR 8131 test is 85.71 with a SD of 6.81. Find the raw score for a student who has a Z score of (1 point each; 3 points total): (a) 1.35 (b) -1.95 (c) 0.00 11. According to the National Health and Nutrition Examination Survey and the Epidemiologic Follow-up Study the mean systolic blood pressure for individuals aged 25 to 59 is 127.3 with a standard deviation of 20.2. A sample measurement of systolic blood pressure from 15 EDUR 8131 Statistics students is taken to learn whether EDUR 8131 students have blood pressure that differs from the national average. (a) Perform a one sample Z test on these data to learn whether a difference in blood pressure exists • present calculated Z test value; • write a brief conclusion about your finding (4 points). (b) Construct a 95% confidence interval about the sample mean for these data (2 points). Sample Systolic Blood Pressure 133 156 101 145 119 137 105 146 132 109 164 163
Uploaded by Professor_Internet_Jaguar14 on coursehero.com