Question
Offered Price $8.00

The mean lifetime for cardiac stents is 8.9 years

Question # 00621980
Subject: Statistics
Due on: 11/25/2017
Posted On: 11/25/2017 11:39 AM

Rating:
4.1/5
Expert tutors with experiences and qualities
Posted By
Best Tutors for school students, college students
Questions:
105488
Tutorials:
104563
Feedback Score:

Purchase it
Report this Question as Inappropriate
Question

hypothesis testing on biostatistics

1. The mean lifetime for cardiac stents is 8.9 years. A medical device company has implemented some improvements in the manufacturing process and hypothesizes that the lifetime is now longer. A study of 40 new devices reveals a mean lifetime of 9.7 years with a standard deviation of 3.4 years. Is there a statistical evidence of a prolonged lifetime of the stents? Run the test at a 5% level of significance.

2. The Table below displays descriptive statistics on subjects involved in a clinical trial. Are any of the characteristics significantly different between groups? Justify briefly.

New Compound Placebo p-value

Mean age (years) 47.2 46.1 0.7564

Men (%) 44 59 0.0215

Mean educational level (years) 13.1 14.2 0.6898

Mean annual income $36,560 $37,470 0.546

Mean body mass index (BMI) 24.7 25.1 0.0851

Tags years stents cardiac lifetime mean years lifetime mean level groups different justify brieflynew compound significantly thecharacteristics clinical subjects placebo trial involved 00215mean 0546mean 0 body index 00851 1 income statistics 07564men educational 06898mean annual pvaluemean

Tutorials for this Question
Available for
$7.00

The mean lifetime for cardiac stents is 8.9 years

Tutorial # 00620671
Posted On: 11/25/2017 11:39 AM
Posted By:
Best Tutors for school students, college students rey_writer
Expert tutors with experiences and qualities
Questions:
105488
Tutorials:
104563
Feedback Score:
Report this Tutorial as Inappropriate
Tutorial Preview …mean xxxxxxxx for…
Attachments
The_mean_lifetime_for_cardiac_stents_is_8.9_years_.zip (8.13 KB)
Preview not available.
Purchase this Tutorial @ $7.00 *
* - Additional Paypal / Transaction Handling Fee (3.9% of Tutorial price + $0.30) applicable
Loading...