Mathematics, 07.12.2021 22:20 laurencollett4838
In a study of heart surgery, one issue was the effect of drugs called beta-blockers on the pulse rate of patients during surgery. The available subjects were divided at random into two groups of 30 patients each. One group received a beta-blocker; the other group received a placebo. The pulse rate of each patient at a critical point during the operation was recorded. The treatment group had a mean pulse rate of 65.2 and standard deviation 7.8. For the control group, the mean pulse rate was 70.3 and the standard deviation was 8.3. What is the probability that the difference in the samples (treatment group – placebo group) is greater than 0?
Answers: 2
Mathematics, 22.06.2019 04:30, Geo777
Determine whether the data described are qualitative or quantitative and give their level of measurement if the data are quantitative, state whether they are continuous or discrete. soft drink sizes: small, medium, large. oa. qualitative, nominal o b. qualitative, ordinal- o c. quantitative, ordinal, discrete o d. quantitative, ordinal
Answers: 3
Mathematics, 22.06.2019 04:30, angieplasencia8
Kate has 50 quarters and dimes. she has a total of $9.80. how many dimes that she have?
Answers: 1
Mathematics, 22.06.2019 05:30, bartlettcs9817
Aletter in the word electric is chosen at random. complete each sentence. there are possible outcomes. the theoretical probability that a vowel will not be chosen is the ratio . the theoretical probability that the letter n will be chosen is .
Answers: 2
Mathematics, 22.06.2019 05:50, naomicervero
Lisa dined at a restaurant and gave the waiter a 15% tip if the price of her meal was $10.25 how much did lisa tip the waiter
Answers: 2
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