Mathematics, 22.11.2019 06:31, alexandroperez13
Areal estate company is interested in the ages of home buyers. they examined the ages of thousands of home buyers and found that the mean age was 48 years old, with a standard deviation of 9 years. suppose that these measures are valid for the population of all home buyers. complete the following statements about the distribution of all ages of home buyers.
(a) according to chebyshev's theorem, at least of the home buyers' ages lie between 30 years and 66.
(b) (a) according to chebyshev's theorem, at least of the home buyers' ages lie between 25.5 years and 70.5.
(c) suppose that the distribution is bell-shaped. according to the empirical rule, approximately of the home buyers' age lie between 30 years and 66.
(d) suppose that the distribution is bell-shaped. according to the empirical rule, 99.7% of the home buyers' ages lie between years and years.
Answers: 2
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Use addition and subtraction to simplify the following polynomials. a. add polynomials: (3 β 4x + 8x^2) + (β6 + 2x β 5x^2) step 1: rewrite the polynomials without the parentheses. step 2: write the polynomial in descending order and use parentheses around like terms. step 3: add the like terms identified in step 2 to simplify the polynomial. b. subtract polynomials: (3x β 5 β 7x^2) β (β2 + 6x^2 β 5x) step 1: rewrite the polynomials without the parentheses. remember to multiply each term in the second parentheses by β1. show your work. step 2: write the polynomial in descending order and use parentheses around like terms. step 3: add the like terms identified in step 2 to simplify the polynomial.
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Mathematics, 22.06.2019 03:20, mehnamejet92
Given a normal distribution with Β΅ =50 and Ο =4, what is the probability that 5% of the values are less than what x values? between what two x values (symmetrically distributed around the mean) are 95 % of the values? instructions: show all your work as to how you have reached your answer. donβt simply state the results. show graphs where necessary.
Answers: 3
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