Computing a confidence interval for the mean

Assignment Help Basic Statistics

Reference no: EM1385925

1. Assume that the standard deviation of college student IQ's is 10. A random sample of 100 students from a college showed an average IQ of 110. Compute a 95% confidence interval for the mean IQ of students attending this college.

2. In the Idaho State Home for Runaway Girls, 25 residents were polled as to what age they ran away from home. The sample mean was 16 year old and the sample deviation was 1.9 years. Compute a 95% confidence interval for the mean age at which runaway girls leave home in Idaho.

3. The nicotine content of five cigarettes of a brand measured in milligrams are 21,19,23,19,24. Compute a 0.99 confidence interval for the average nicotine content of the brand.

Reference no: EM1385925

Questions Cloud

Explain performance which is boost by new version of chip : Let the following hypothetical news release: "Company will unveil industry's first 5 GHz version of chip, which presents 25% performance boost over company's former speed champ. Explain the definition (or definitions) of performance.

Real contemporary problem : Write down a real contemporary problem where you see the status quo as lined up against something that is just or in favor of something that is unjust.

Standard deviation of all orders in sample : How many categories in the ACME transportation table are qualitative and what is the average number of merchandise per order, for all orders? Round to the nearest integer and what is the standard deviation of all orders in this sample?

What was the labor productivity in dollars per labor-hour : What was the labor productivity, in dollars per labor-hour, at this job shop during the first week of March?

Computing a confidence interval for the mean : Assume that the standard deviation of college student IQ's is 10. A random sample of 100 students from a college showed an average IQ of 110. Compute a 95% confidence interval for the mean IQ of students attending this college.

Moral reasoning and legal reasoning : Discuss in three to four sentences, in your own words, what is moral reasoning and legal reasoning. Describe in three to four sentences why lawyers use analogy to argue cases. Determine two theories proposed by moral philosophers.

Find required starting solution : Assume you have one hundred ml each of 400 mg/ml sodium phosphate, 250 mg/ml sodium chloride, and 100 mg/ml potassium nitrate.

Obtaining a measure of overall performance : Cunningham Performance Auto, Inc. modifies 375 autos per year. The manager, Peter Cunningham, is interested in obtaining a measure of overall performance.

Should employers be allowed to monitor employees : Should employers be allowed to monitor employees in the workplace? Should distinctions be made based on whether it is monitoring computers

User Account

All Pages