### Need Confidence Interval Assignment Help? Try Our Services And Experience Academic Brilliance!

Home   Course
Previous << || >> Next

Confidence Interval Assignment

ARE YOU LOOKING FOR RELIABLE CONFIDENCE INTERVAL ASSIGNMENT HELP SERVICES? EXPERTSMINDS.COM IS RIGHT CHOICE AS YOUR STUDY PARTNER!

Question 1: Find the mean, mod, median, and standard deviation of the following data:

5, 6, 7, 8, 9,8,7,8

Based on these results, check whether the value of 10 is usual?

Solution

The mean is calculated by using the formula given below

x ¯=(∑i=1nxi)/n = (5+6+7+8+9+8+7+8)/8=58/8=7.25

The median is calculated by using the formula given below (after arranging the data in ascending order of magnitude)

Median=((n/2)^th+(n/2+1)^th)/2

=((8/2)^th+(8/2+1)^th)/2

=((4)^th+(5)^th)/2

=(7+8)/2=7.5

Therefore, the required median is 7.5

s=√((∑i=1n(xi-x ¯ )2 )/(n-1))=1.282

The mode is defined as the most repeated value in the dataset. The mode is 8 as it is repeated to a maximum of 3 times

The standard deviation is calculated by using the formula given below

Here, 10 is not in the sample and therefore, it is not considered as an usual value

ORDER NEW CONFIDENCE INTERVAL ASSIGNMENT & GET 100% ORIGINAL SOLUTION AND QUALITY WRITTEN CONTENTS IN WELL FORMATS AND PROPER REFERENCING.

Question 2. Pre-Employment Drug Screening Results are shown in the following Table:

 Positive Test Result Negative Test Result Subject Uses Drugs 8 (True Positive) 2 (False Negative) Subject is not a Drug User 10 (False Positive) 180 (True Negative)

Solution:

i. If 1 of the 200 test subjects is randomly selected, find the probability that the subject had a positive test result, given that the subject actually uses drugs. That is,

findP (positive test result | subject uses drugs) = 8/10 = 0.8

ii. If 1 of the 200 test subjects is randomly selected, find the probability that the subject actually uses drugs, given that he or she had a positive test result. That is,

findP (subject uses drugs |positive test result) = 8/18 = 0.444

Question 3. This is observation from previous years about the impact of students working while they are enrolled in classes, due to students too much work, they are spending less time on their classes. First, the observer need to find out, on average, how many hours a week students are working. They know from previous studies that the standard deviation of this variable is about 5 hours. A survey of 200 students provides a sample mean of 7.10 hours worked. What is a 95% confidence interval based on this sample?

Solution:

The 95% confidence interval is calculated by using the formula given below

(x ¯-Z_(1-∝/2)*σ/√n,x ¯+Z_(1-∝/2)*σ/√n)=(7.1-1.96*5/√200,7.1+1.96*5/√200)
=(7.1-1.96*0.354,7.1+1.96*0.354)
= (7.1 - 0.693, 7.1 + 0.693)
= (6.407, 7.793)

The 95% confidence interval for the sample is (6.407, 7.793)

GET ASSURED A++ GRADE IN EACH CONFIDENCE INTERVAL ASSIGNMENT ORDER - ORDER FOR ORIGINALLY WRITTEN SOLUTIONS!

Tag This :- Confidence Interval Assignment Help, EM201970FAN719STAT

### Assignment Samples

 0506200 - Principles of MIS Assignment Help 0506200 - principles of mis assignment help- this article is about a case study of apple inc. & focus is on the usage of the information system in in the firm. International Compensation Assignment Help international compensation assignment help - you will need to research and choose the relocation country and draft a relocation policy Linear Programming Model Assignment Help linear programming model assignment help - Formulate a linear programming model for the make-or-buy decision for Cleveland HI5015 Legal Aspects of International Trade & Enterprise Assignment Help hi5015 legal aspects of international trade & enterprise assignment help - The case Australia Vs Canada in the importation of the salmon and restrictions Security Assessments, Enhancements, and Evaluations of the Applications Assignment Help security assessments, enhancements, and evaluations of the applications assignment help- It can be concluded that application security is important for every VPN Replacement Technologies Assignment Help vpn replacement technologies assignment help, melbourne institute of technology - Significance of VPN for contemporary organisations. Fair Treatment of Ethnicities Assignment Help fair treatment of ethnicities assignment help - Determine how to assess the assimilation progress of workers to different people and cultures

Get Academic Excellence with Best Skilled Tutor! Order Assignment Now!