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cricket20 [7]
3 years ago
7

A pharmaceutical manufacturer is concerned that the impurity concentration in pills should not exceed 3%. It is known that from

a particular production run impurity concentrations follow a normal distribution with a standard deviation of 0.4%. A random sample of 64 pills from a production run was checked, and the sample mean impurity concentration was found to be 3.07%. Testing at the 5% level the null hypothesis that the population mean impurity concentration is 3% against the alternative that it is more than 3%.
a. Calculate the p-value for this test.
b. Find the p-value for this test and draw your conclusion.
c. Suppose that the alternative hypothesis in part b had been two-sided rather than one-sided. Conduct your test using either the critical value or the p-value approach.
Mathematics
1 answer:
Gnoma [55]3 years ago
5 0

Answer:

c

Step-by-step explanation:

Marl me as brainliest answer c

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The roots of a quadratic equation ax2+bx+c=0 are 3+sqrt2 and 3−sqrt2. Find the values of b and c assuming that a=1.
slamgirl [31]

Answer:

b=-6\\c=7

Step-by-step explanation:

we know that

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y=a(x-x_1)(x-x_2)

where

a is a coefficient of the leading term

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substitute

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Applying the distributive property convert to expanded form

y=x^2-x(3-\sqrt{2})-x(3+\sqrt{2})+(3+\sqrt{2})(3-\sqrt{2})

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therefore

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Hope this answer helps you :)

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