 , 03.12.2019 07:32 Tcareyoliver

# Asurvey claims that 9 out of 10 doctors (i. e., 90%) recommend brand z for their patients who have children. to test this claim against the alternative that the actual proportion of doctors who recommend brand z is less than 90%, a random sample of doctors was taken. suppose the test statistic is z= - 2.23. can we conclude that he should be rejected at the a) a = 0.10, b) a = 0.05, and c) a = 0.01 level? o a. a) no; b) no; c) no ob. a) yes; b) yes; c) yes oc. a) no; b) no; c) yes od. a) yes; b) yes; c) no click to select your answer   ### Another question on Mathematics Mathematics, 01.02.2019 22:33
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The line plot below represents the number of letters written to overseas pen pals by the students at the waverly middle school.each x represents 10 students. how many students wrote more than 6 and fewer than 20 letters. a.250 b.240 c.230 d.220 Mathematics, 01.02.2019 17:34
Can you make 1000, using only eight 8’s? if you had your choice, would you rather have 5 million dollars, or 1 penny, doubled every day for a month? Mathematics, 01.02.2019 16:30
More challenges: 1) factor out the indicated quantity.8mn² + 7mn - m : factor out the quantity -m2) factor the polynomial by grouping.2vw + 7cv + 14cw + 49c²3) factor completely using the difference of squares along with factoring by grouping.25v³ - 25v² - 4v + 44) factor the sum of cubes. 125x³ + 645) q³ + 27r³6) factor completely. use difference of squares.729p^6 - 6^67) solve the equation(7x + 4)(9x - 1) = 08) a. find the values of x for which f (x) = 0b. find f (0)f (x) = x² + 2x - 489) find the x and y-intercepts for the function defined by y = f (x)f (x) = (x + 3)(x + 4)(x - 1)²10) factor the trinomial completely by using any method. remember to look for a common factor first. 3v² - 2v - 16
Asurvey claims that 9 out of 10 doctors (i. e., 90%) recommend brand z for their patients who have
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