Question

In: Statistics and Probability

A consumer magazine wants to compare the lifetimes of ballpoint pens of three different types. The...

A consumer magazine wants to compare the lifetimes of ballpoint pens of three different types. The magazine takes a random sample of pens of each type in the following table. Assume that the populations are normally distributed with the same variance.

Brand 1 Brand 2 Brand 3

260 187 237

218 245 251

185 164 246

227 219 218

Solutions

Expert Solution



Related Solutions

An experiment was conducted to compare the lifetimes of two different car batteries(from two different manufacturer)...
An experiment was conducted to compare the lifetimes of two different car batteries(from two different manufacturer) that both claim a lifetime of at least 4 years. 12 batteries from apremium manufacturer were tested and the results were a mean lifetime of 4.31 years with a standarddeviation of 0.39 years. 15 batteries from a budget manufacturer were tested and the results werea mean lifetime of 3.94 years with a standard deviation of 0.63 years. Can you conclude up to aα= 0.05level...
A researcher wants to compare the efficacy of three different techniques for memorizing information. They are...
A researcher wants to compare the efficacy of three different techniques for memorizing information. They are repetition, imagery, and mnemonics. The researcher randomly assigns participants to one of the techniques. Each group is instructed in their assigned memory technique and given a document to memorize within a set time period. Later, a test about the document is given to all participants. The scores are collected and analyzed using a one-way ANOVA. Here is the ANOVA table with the results: Source...
An experiment is conducted to compare the effects of weathering on paint of three different types....
An experiment is conducted to compare the effects of weathering on paint of three different types. To do so, identical surfaces are coated with some paint of each type that has been exposed to four different environments. Measurements of the degree of deterioration we made for each surface. The data set is uploaded to Moodle. What can you say about the different paint types and different environments and their effects on the paint degradation? Deterioration Paint Type Environment 9.42 A...
"Three Sample ANOVA QB" Researcher wants to compare test performance for tests printed on three different...
"Three Sample ANOVA QB" Researcher wants to compare test performance for tests printed on three different colors of paper; Red, Green, and the Standard White. The researcher selects a sample of 11 individuals and has each individual take one test on Red paper, another test on Green paper, and a third test on the Standard White paer. The data are listed below. The researcher wants to minimize the probability of making a Type I error.    Red Green White   ...
Company B wants to compare the investment in three different countries based on the following information....
Company B wants to compare the investment in three different countries based on the following information. Tax rate is 30% for all three countries. MARR is 9% compounded quarterly. Country 1 Country 2 Country 3 Depreciation method SL with n=5 MACRS with n=3 DDB with n=5 Depreciation recapture Not taxed Taxed as T.I. Taxed as T.I. Purchase cost 100,000 100,000 100,000 Gross Income 26,000 27,000 29,000 Expense 1,000 2,000 4,000 Salvage 0 0 20,000 Life in years 5 5 5...
"Three Sample ANOVA QA" Researcher wants to compare three Types of Therapy [Behavior Therapy (BT), Cognitive...
"Three Sample ANOVA QA" Researcher wants to compare three Types of Therapy [Behavior Therapy (BT), Cognitive Therapy (CT), and Cognitive-Behavior Therapy (CBT)] to determine which therapy works best (lowers) for treating clinical depression. The researcher selects a sample of individuals who have been diagnosed with clinical depression of size 33 (N = 33) to test the research hypothesis (alternative hypothesis) that there is a difference in the ability of the three therapies to treat clinical depression. The 33 participants are...
A consumer magazine wants to figure out which of two major airlines lost a higher proportion...
A consumer magazine wants to figure out which of two major airlines lost a higher proportion of luggage on international flights. The magazine surveyed Standard Air (population 1) and Down Under airlines (population 2). Standard Air lost 45 out of 600 bags. Down Under airlines lost 30 of 500 bags. Does Standard Air have a higher population proportion of lost bags on international flights? Which of the following is the appropriate conclusion at the 5% significance level?
Compare and contrast the physical characteristics and immunisation properties of three different types of vaccine adjuvants.
Compare and contrast the physical characteristics and immunisation properties of three different types of vaccine adjuvants.
An adjunct instructor teaches the same statistics class at three different colleges. She wants to compare...
An adjunct instructor teaches the same statistics class at three different colleges. She wants to compare the average age of students in the three classes. Random Sample of 10 Student Ages from Each College School 1 25 23 23 21 19 17 20 21 31 29 School 2 26 21 23 24 19 22 19 24 28 31 School 3 24 23 22 22 20 19 22 23 30 28 (a) Compute the grand mean. (b) Calculate the sum of...
There are three different types of tests we learned. What one of the three types is...
There are three different types of tests we learned. What one of the three types is the following? “ A researcher estimates that high school girls miss more days of school than high school boys. A sample of 16 girls showed that they missed an average of 3.9 days of school and a sample of 22 boys showed that they missed an average of 3.6 days. The standard deviation of the 16 girls was .6 and the standard deviation of...
ADVERTISEMENT
ADVERTISEMENT
ADVERTISEMENT