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

This was A statistics paper of numbered questions and was supposed to be solved orderly.

source..

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,

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