Construct a confidence interval for difference in means

Assignment Help Basic Statistics

Reference no: EM131373480

Active Trader compared earnings on stock investments when companies made strong pre-earnings announcements versus cases where pre-earnings announcements were weak. Both sample sizes were 28.

The average performance for the strong preearnings announcement group was 0.19%, and the average performance for the weak pre-earnings group was 0.72%.

The standard deviations were 5.72% and 5.10%, respectively.5 Conduct a test for equality of means using α = 0.01 and construct a 99% confidence interval for difference in means.

Reference no: EM131373480

Questions Cloud

In what way is compliance different from conformity : In what way is compliance different from conformity? Which factor significantly decreased the likelihood of conformity in Solomon Asch's studies

Which of the following is a strength of experiments : Which of the following is a strength of experiments? While on a visit to a large city, you observe several billboards in which a series of lights seems to move. Which perspective in psychology would be most likely to study this phenomenon

Determine require tube length using physical property values : ChE 350- Determine the required tube length using physical property values at a mean temperature of 62.5°C. What fraction of the power dissipated by the tape is transferred to the water in tube in the absence of radiation exchange?

Confidence interval for the difference : Give a 95% confidence interval for the difference in the average percentage of commissions in research versus nonresearch brokerage houses.

Construct a confidence interval for difference in means : The standard deviations were 5.72% and 5.10%, respectively.5 Conduct a test for equality of means using α = 0.01 and construct a 99% confidence interval for difference in means.

Give the answer of muliple choice question : PSY/335:Watch the "Introduction to Designing Experiments" video located in this week's Electronic Reserve Readings. Copy and past link below for video.Complete the following quiz. Choose your response by highlighting your answer.

Arabic sentiment analysis : methodology proposed for arabic social sentiment analysis of Twitter tweets using natural language processing (NLP) and 3 supervised machine learning approaches that are the Support Vector Machines

Is this a one tailed or a two tailed test : Is this a one-tailed or a two-tailed test? Explain.- Carry out the hypothesis test at the 0.05 level of significance.- State your conclusion.- What is the p-value? Explain its relevance.

Calculate the number of moles of bicarbonate and acetic acid : Calculate the number of moles of bicarbonate and acetic acid in each test tube in the inquiry activity using the following information.assume the density of the vinegar is 1.0g/ml and that the solution is 5% acetic acid.

User Account

All Pages