, 03.12.2019 07:32

# 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, 02.02.2019 18:40
Arefrigeration system at your company uses temperature sensors fixed to read celsius (°c) values, but the system operators in your control room understand only the fahrenheit scale. you have been asked to make a fahrenheit (°f) label for the high temperature alarm, which is set to ring whenever the system temperature rises above –10°c. what fahrenheit value should you write on the label?