Robin Standard STAT 1124 HW 3 (Confidence Interval & Hypothesis Test for Mean and Proportion) Instructions: • You can do this HW in pairs. If you do so please hand in only one paper with both your...

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Answered Same DayApr 07, 2021

Answer To: Robin Standard STAT 1124 HW 3 (Confidence Interval & Hypothesis Test for Mean and Proportion)...

Naveen answered on Apr 08 2021
161 Votes
1.a)
The population is the people of entire area where the viral infection is affected.
The
parameter of interest is that the proportion of the people in whom the immunity increased after the vaccination.
b).
Null Hypothesis (H0): The vaccine is less than or equal to 90% effective.
Alternative Hypothesis (H1): The vaccine is effective more than the 90%.
The Z-test statistics = 0.9
P-value = 0.1863
Here the p value is greater than 0.05
So, we can conclude that we accept the null hypothesis that means the vaccine is less than or equal to 90% effective.
c).
By repeating the test with changing the various significance levels the result or the conclusion is changing so, we can increase the significance level.
2.a).
Parameter of interest is delivery time of the parcel by post.
Null hypothesis (H0): The delivery time of the international parcel by post is 10 days.
Alternative Hypothesis (H1): The delivery time of the international parcel by...
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