An instructor is interested in checking whether attending

Assignment Help Basic Statistics

Reference no: EM13615479

An instructor is interested in checking whether attending labs improves students' performance on their finals. The instructor asks a TA to investigate this problem. The TA decides to conduct a one-sided two sample t-test. He randomly chooses 30 students in the course who never missed a lab, as well as 25 students from the same course who missed at least 1 lab. Let ?1 denote the mean final exam score of all students in the course who never missed a lab. Let ?2 denote the mean final exam score of all students in the course who missed at least 1 lab. The hypothesis test can be formulated as H0:?1=?2 vs HA:?1>?2. The P-value is 0.001.

Part a) What type of study is this?

An experiment with a matched pairs design.

An experiment with a randomized block design.

An observational study.

An experiment with a completely randomized design.

Part b) What can we conclude from this study? (Select all that apply)

A. Since the null hypothesis is rejected at 5% level, the TA can report to the instructor that there is sufficient evidence to show attending labs improves performance on finals.

B. Since the P-value is very small, the TA can report to the instructor that there is strong evidence to show attending labs improves performance on finals.

C. There is insufficient evidence to answer the instructor's question.

Reference no: EM13615479

Questions Cloud

Ms xyz started a business of expensive jewelry and invested : ms xyz started a business of expensive jewelry and invested in this business by borrowing funds of rs. 4.5 million 7

Suppose z is from a standard normal random : suppose z is from a standard normal random variablefind z0 so p-z0ltzltz0.88please show work and excel formula if

You are to describe the scenario state the null and : set up a hypothesis test for a scenario of your choice. you can use a scenario from your own experience or invent

Generate a 95 ci for the difference in proportions of : a clinical trial is conducted to compare an experimental medication to placebo to reduce the symptoms of asthma. two

An instructor is interested in checking whether attending : an instructor is interested in checking whether attending labs improves students performance on their finals. the

A 90 confidence interval for the difference between the : a 90 confidence interval for the difference between the means of two independent populations with unknown population

Dtermine the sample proportionsbdecide whether using the : determine the sample proportions.bdecide whether using the two-proportions z-procedures is appropriate.if soalso do

Given the linear correlation coefficient r and the sample : given the linear correlation coefficient r and the sample size n determine the critical values of r and use your

Find the lower amp upper limits of a confidence interval if : find the lower amp upper limits of a confidence interval if the mean is eighteen percent and the margin of error is

User Account

All Pages