Statistics Mathematics & Economics Research Paper Essay (Other (Not Listed) Sample)

Student’s Name
Professor
Institution Affiliation
Course
Date
Question One
Solution:
No, the presented data points are inadequate to develop a confidence interval with the mean of 3.6. Furthermore, the study does not require a confidence interval on the subject, even if calculated. (Sharpe, D. 2015)
Question Two
Solution:
C.I=95%, σ=0.90 & x̄ = 0.10,
We find Z (at 95% C.I):
√n
Checking from statistical tables:
Z = 1.96 Thus
0.9
0.1=1.96×
√n
Rearranging:
0.1 = 0.9 × 1.96
2952750346075Make n the subject:
n= (0.90*1.96)2 (0.1)
= 311.16
Thus: n≅311
Question Three
Solution:
Proportion used in decision determination, n = 120
The proportion of people who believe that the tax rate is too high, P = (120/200) =0.6
We wish to calculate the test statistic based on the proportion at 95% to determine whether the proportion lies between the confidence interval
= 1.96{P× (1−1200.6 )0.5} =0.067896,