Assume the IQ scores of a distribution of 1000 college-aged students is bell shaped with a mean of 115 and a standard deviation of 9. Use the Empirical rule to determine the percentage of students who are expected to have IQ scores from 106 to 142.
Read DetailsA survey is conducted among college graduates to estimate the average age at which one gets his or her first college degree. For a sample of 12 college graduates, the following ages were collected: 23 26.5 29 21.4 24 34 23.7 21.6 32.4 24.1 24.5 27.7 1. Find the sample mean. Round to 2 decimal places: _______ (b) Find the sample standard deviation. Round to 4 decimal places: _______ 3. Fill in the formula blanks below with specific values for this problem (not symbols) to construct a 99% confidence interval. To enter x{“version”:”1.1″,”math”:”x”} where x is any number, type sqrt(x). For example, 2{“version”:”1.1″,”math”:”2″} should be written as sqrt(2).Round the z-score or t-score to 3 decimal places. (a) _______ (b) _______ (c) _______ (d) _______ (e) _______ (f) _______ (g) _______ (h) _______ 4. Using the formula from part 3, calculate the 99% confidence interval. Round each answer to the nearest hundredth (2 decimal places). _______ years to _______ years. 5. Find the margin of error for this confidence interval. Do not round. _______
Read DetailsAfter reading section 3, TEACHING LANGUAGE: LISTENING AND SPEAKING, in the article, The Role of English Teachers in Educating English Language Learners (ELLs), identify three ways that you can support your ELL students’ “speaking and listening development” during a fourth grade social studies lesson on the map of Florida.
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