Answer:
I'm not fully sure but id say the principle value would be choice C
Step-by-step explanation:
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
=
Your answer is 1/5 Hope this helps :D
Answer:
...
Step-by-step explanation:
1. 0.002
2. 308%
3. 2 6/10