I forget how to subtract, so can you help?
1 answer:
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Answer:
0.0930
Step-by-step explanation:
Given that one of your friends is testing the effect of drinking coffee on the duration of cold symptoms. The common cold lasts, on average, 6 days.
she tests a one-sided alternative about the population mean cold duration when drinking coffee, H0: μcoffee = 6 Ha: μcoffee < 6 She finds z = −1.68 with one-sided P-value P = 0.0465.
If hypotheses changed to two tailed as:
(Two tailed test)
Since we have mean difference and std error the same, test statistic would remain the same.
p value for two tailed would be = twice the p value for one tail
=
Answer:
<h2>11 units</h2>Step-by-step explanation:
Method 1:
The formula of a distance between two points:
We have the points (7, 2) and (-4, 2). Substitute:
Method 2:
Look at the picture. Mark points in the coordinate system.
Read the length of the segment.
