Describe a Type I error for this test.

Mathematics

1 answer:

enot [183]3 years ago

8 0

Answer:

The correct option is (C).

Step-by-step explanation:

Missing information:

According to a university of wildlife ecology and conservation researcher, the average level of mercury uptake in wading birds in a region has declined over the past several years. Five years ago, the average level was 16 parts per million. Give the null and alternative hypotheses for testing whether the average level today is less than 16 ppm.

The hypothesis can be defined as follows:

H₀: The average level of mercury uptake in wading birds in a region is 16 ppm, i.e. μ = 16.

Hₐ: The average level of mercury uptake in wading birds in a region is less than 16 ppm, i.e. μ < 16.

A Type I error is the rejection of a null hypothesis (H₀) when indeed the null hypothesis is true. It is symbolized by α.

In this case the type I error can be defined as:

Concluding that the average level of mercury uptake in wading birds in a region today is less than 16 parts per million, when in fact, the average level of mercury uptake in wading birds in a region today is equal to 16 parts per million.

The correct option is (C).

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3 years ago

Can anyone show me how to divide 931/7

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(You go from left to right)
(Dividend is 931, divisor is 7)
Step 1: Look for a number smaller than 9 that is divisible by 7. 7 is the only one which is smaller than 9 and is divisible by 7. Now that you know 7*1=7, you put 1 above 931 (Dividend)
Step 2: You subtract that number from the number in tens place. And bring the leftover down.
Step 3: You repeat Step 1 and 2 until either you get a remainder of 0 or the remainder in smaller than the divisor (in this case 7)
(Therefore 931/7=133, quotient=133, remainder=0)
^Hope this helps.