Mathematics, 26.12.2019 06:31 curtez11
In an investigation of pregnancy-induced hypertension, one group of women with this disorder was treated with low-dose aspirin, and a second group was given a placebo. a sample consisting of 50 women who received aspirin has mean arterial blood pressure 120mmhg and standard deviation 10mmhg; a sample of 42 women who were given the placebo has mean blood pressure 115mmhg and standard deviation 12mmhg. assume that the underlying population variances are equal. a. at the 0.05 level of significance, test the null hypothesis that the two populations of women have the same mean arterial blood pressure. b. construct a 99% confidence interval for the true difference in population means. does this interval contain the value 0?
Answers: 1
Mathematics, 21.06.2019 17:30
The train station clock runs too fast and gains 5 minutes every 10 days. how many minutes and seconds will it have gained at the end of 9 days?
Answers: 2
Mathematics, 21.06.2019 18:40
Juliana says that she can use the patterns of equivalent ratios in the multiplication table below to write an infinite number of ratios that are equivalent to 6: 10. which statement explains whether juliana is correct? she is correct because she can multiply 6 and 10 by any number to form an equivalent ratio. she is correct because 6: 10 can be written as 1: 2 and there are an infinite number of ratios for 1: 2. she is not correct because the multiplication table does not include multiples of 10. she is not correct because 6: 10 is equivalent to 3: 5 and there are only 9 ratios in the multiplication table that are equivalent to 3: 5.
Answers: 1
Mathematics, 22.06.2019 00:00
50 will mark show all use the linear combination method to solve the system of equations. explain each step of your solution. if steps are not explained, you will not receive credit for that step. 2x+9y= -26 -3x-7y=13
Answers: 1
In an investigation of pregnancy-induced hypertension, one group of women with this disorder was tre...
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