View Policies Current Attempt in Progress Suppose that x has a beta distribution with parameters a = 2.1 and ß = 1. Determine to 4 decimal places the following: а. Р(Х < 0.21) i b. Р(0.21 < X < 0.76) i c. Mean i d. Variance

A and b solve only

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nutritionist claims that the mean tuna consumption by a person is 3.4 pounds per year. A sample of 90 people shows that the mean tuna consumption by a person is 3.3 pounds per year. Assume the population standard deviation is 1.02 pounds. At α=0.03​, can you reject the​ claim?       ​(a) Identify the null hypothesis and alternative hypothesis.     A. H0​: μ=3.4 Ha​: μ≠3.4 Your answer is correct.   B. H0​: μ>3.4 Ha​: μ≤3.4   C. H0​: μ≤3.3 Ha​: μ>3.3   D. H0​: μ≤3.4 Ha​: μ>3.4   E. H0​: μ>3.3 Ha​: μ≤3.3   F. H0​: μ≠3.3 Ha​: μ=3.3 ​(b) Identify the standardized test statistic.   z=negative 0.93−0.93 ​(Round to two decimal places as​ needed.) ​(c) Find the​ P-value.   0.3520.352 ​(Round to three decimal places as​ needed.) ​(d) Decide whether to reject or fail to reject the null hypothesis.