SUPER BOWL FRACTIONS DECIMALS PERCENTS TEAM NAME FRACTION DECIMAL PERCENT FRACTION DECIMAL WON PERCENT LOSS WON WON LOSS LOSS Patriots 6/11 0.545 54.5% | Steelers Cowboys 3/8 0.375 37.5% Broncos 49ers 5/7 0.714 71.4% Packers Giants 1/5 0.2 20% Dolphins
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- The state education commission wants to estimate the fraction of tenth-grade students that have reading skills at or below the eighth-grade level. Step 1 of 2 : Suppose a sample of 1134 tenth graders is drawn. Of the students sampled, 226 read at or below the eighth-grade level. Using the data, estimate the proportion of tenth graders reading at or below the eighth-grade level. Enter your answer as a fraction or a decimal number rounded to three decimal places.The state education commission wants to estimate the fraction of tenth grade students that have reading skills at or below the eighth grade level. Step 1 of 2: Suppose a sample of 2845 tenth graders is drawn. Of the students sampled, 2276 read above the eighth grade level. Using the data, estimate the proportion of tenth graders reading at or below the eighth grade level. Enter your answer as a fraction or a decimal number rounded to three decimal places.A new non-invasive screening test is proposed that is claimed to be able to identify patients with impaired glucose tolerance based on a battery of questions related to health behaviors. The new test is given to 75 patients. Based on each patient’s responses to the questions they are classified as positive or negative for impaired glucose tolerance. Each patient also submits a blood sample and their glucose tolerance status is determined. The results are tabulated below. What is the sensitivity of the screening test? What is the false positive fraction of the screening test? Screening Test Impaired Glucose Tolerance Not Impaired Positive 17 13 Negative 8 37
- A university wants to determine what fraction of its student body support a new $ 25 annual fee to improve the student union. Describe a valid sampling method in this situation.An environmentalist wants to find out the fraction of oil tankers that have spills each month. Part a). Suppose a sample of 198 tankers is drawn. Of these ships, 155 did not have spills. Using the data, estimate the proportion of oil tankers that had spills. Enter your answer as a fraction or a decimal number rounded to three decimal places. Part b). Suppose a sample of 198 tankers is drawn. Of these ships, 155 did not have spills. Using the data, construct the 80% confidence interval for the population proportion of oil tankers that have spills each month. Round your answers to three decimal places.The state education commission wants to estimate the fraction of tenth grade students that have reading skills at or below the eighth grade level. Step 1 of 2: Suppose a sample of 333 tenth graders is drawn. Of the students sampled, 260 read above the eighth grade level. Using the data, estimate the proportion of tenth graders reading at or below the eighth grade level. Enter your answer as a fraction or a decimal number rounded to three decimal places. Step 2 of 2: Suppose a sample of 333 tenth graders is drawn. Of the students sampled, 260 read above the eighth grade level. Using the data, construct the 80% confidence interval for the population proportion of tenth graders reading at or below the eighth grade level. Round your answers to three decimal places.
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