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sp2606 [1]
2 years ago
9

Asha made this diagram to solve 92÷34

Mathematics
1 answer:
antiseptic1488 [7]2 years ago
8 0

Answer:

Step-by-step explanation:

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Consider the following hypothesis test:H0: 20Ha: < 20A sample of 60 provided a sample mean of 19.6. The population standard d
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b: 0.0265

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Step-by-step explanation:

We are given:

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HA:  µ < 20

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Since the alternate hypothesis has a < sign in it, it is a left tailed test.  The < or > sign in the alternate hypothesis points towards the rejection region.

For a:  We need to calculate the test statistic for our situation.  This is done with a z-score formula for samples.  

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For d:  Since the significance level is 0.05, and this is a one tailed test, we have a critical value of z < - 1.645.  This means that if the z-score we calculate in part a is less than -1.645, we will reject the null hypothesis

See attached photo for all the calculations!

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Simple math.

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C

Step-by-step explanation:

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