Rhino viruses typically cause common colds. in a test of the effectiveness of echinacea, 39 of the 45 subjects treated with echinacea developed rhinovirus infections. in a placebo group, 87 of the 101 subjects developed rhinovirus infections. use a 0.01significance level to test the claim that echinacea has an effect on rhinovirus infections. complete parts (a) through (c) below. a. test the claim using a hypothesis test. consider the first sample to be the sample of subjects treated with echinacea and the second sample to be the sample of subjects treated with a placebo. what are the null and alternative hypotheses for the hypothesis test? a. h0: p1 = p 2h1: p 1 ≠ p2b. h0: p1 ≠ p 2h1: p 1 = p2c. h0: p1 greater then or equal to p 2h1: p 1 ≠ p2d. h0: p1 = p2h1: p1 < p 2e. h0: p 1 ≤ p 2h1: p 1 ≠ p 2f. h0: p1 = p 2h1: p1 > p2
b. identify the test statistic. z= (round to two decimal places as needed.)
c. identify the p-value. p-value= (round to three decimal places as needed.)

The probability that an adult possesses a credit card is .70. a researcher selects two adults at random. by assuming the independence, the probability that the first adult possesses a credit card and the second adult does not possess a credit card is:

1.3.25 question suppose 40​% of all voters voted for a particular candidate. to simulate exit polls regarding whether or not voters voted for this​ candidate, five random samples of size 1010 and five random samples of size 10001000 have been generated using technology using a population proportion of 0.400.40​, with the accompanying results. complete parts a through c below. click the icon to view the simulation results. a. observe how the sample proportions of successes vary around 0.400.40. simulation compared to sample prop simulation compared to sample prop 1 ▾ 6 ▾ greater than 0.40 less than 0.40 equal to 0.40 2 ▾ less than 0.40 greater than 0.40 equal to 0.40 7 ▾ greater than 0.40 less than 0.40 equal to 0.40 3 ▾ greater than 0.40 less than 0.40 equal to 0.40 8 ▾ equal to 0.40 greater than 0.40 less than 0.40 4 ▾ greater than 0.40 equal to 0.40 less than 0.40 9 ▾ less than 0.40 greater than 0.40 equal to 0.40 5 ▾ equal to 0.40 less than 0.40 greater than 0.40 10 ▾ equal to 0.40 greater than 0.40 less than 0.40 click to select your answer(s) and then click check answer. 2 parts remaining clear all check answer

Suppose the equation ||x-a|-b|=2008 has 3 distinct real roots and a not =0. find the value of b.