Is there a difference in the amount of airborne bacteria between carpeted and uncarpeted rooms? In...
Is there a difference in the amount of airborne bacteria between carpeted and uncarpeted rooms? In an experiment, seven rooms were carpeted and seven were left uncarpeted. The rooms are similar in size and function. After a suitable period, the concentration of bacteria in the air was measured (in units of bacteria per cubic foot) in all of these rooms. The P-value for this test is greater than 0.25. Which of the following is a reasonable conclusion?
A.There is fairly strong evidence to support a conclusion that the presence of carpet is associated with an increase or decrease in the mean bacterial concentration of air.
B.There are outliers in these data, so we can't rely on the two-sample t test.
C.There isn't much evidence to support a conclusion that the presence of carpet is associated with an increase or decrease in the mean bacterial concentration of air.
D. This test is unreliable because the populations we're sampling from are heavily skewed.
Homework Answers
There isn't much evidence to support a conclusion that the presence of carpet is associated with an increase or decrease in the mean bacterial concentration of air.
Option C is correct.
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Is there a difference in the amount of airborne bacteria between
carpeted and uncarpeted rooms? In...
Is there a difference in the amount of airborne bacteria between carpeted and uncarpeted rooms? In...
Is there a difference in the amount of airborne bacteria between carpeted and uncarpeted rooms? In an experiment, seven rooms were carpeted and seven were left uncarpeted. The rooms are similar in size and function. After a suitable period, the concentration of bacteria in the air was measured (in units of bacteria per cubic foot) in all of these rooms. The P-value for this test is greater than 0.25. Which of the following is a reasonable conclusion? There are outliers...
A researcher wanted to determine if carpeted rooms contain more bacteria than uncarpeted rooms. The table...
A researcher wanted to determine if carpeted rooms contain more bacteria than uncarpeted rooms. The table shows the results for the number of bacteria per cubic foot for both types of rooms Carpeted 6.4 7.4 9.5 8.2 15.9 12.6 13.2 11.6 Full data set Uncarpeted 6.2 4.2 8.1 12.9 4.5 11.9 11.1 4.4 Determine whether carpeted rooms have more bacteria than uncarpeted rooms at the a = 0.01 level of significance. Normal probability plots indicate that the data are approximately...
A researcher wanted to determine if carpeted rooms contain more bacteria than uncarpeted rooms. The table...
A researcher wanted to determine if carpeted rooms contain more bacteria than uncarpeted rooms. The table shows the results for the number of bacteria per cubic foot for both types of rooms. Full data set o Carpeted | Uncarpeted 10 14.5 12.4 || 7.1 13.1 4.7 6.4 8.7 8.7 || 4.6 13 7.9 15.2 6.3 11.6 7.5 Determine whether carpeted rooms have more bacteria than uncarpeted rooms at the a= 0.01 level of significance. Normal probability plots indicate that the...
Rooms contained more bacteria than uncarpeted the air from the Researchers wanted to determine if...
rooms contained more bacteria than uncarpeted the air from the Researchers wanted to determine if carpeted rooms. To determine the amount of bacteria in a room, researchers pumped room over a Petri dish at the rate of I cubic foot per minute for eight carpeted rooms eight uncarpeted The results are presented in the table below. A normal probability plot and boxplot indicate that the data are approximately normally distributed with no outliers. 2) and rooms. Colonies of bacteria were...
A researcher wanted to determine if carpeted rooms contain more bacteria than uncarpeted rooms. The table...
A researcher wanted to determine if carpeted rooms contain more bacteria than uncarpeted rooms. The table shows the results for the number of bacteria per cubic foot for both types of rooms. Carpeted 7.8 9.5 14.3 12.3 12.7 12.3 8 7 Uncarpeted 8.9 4.6 14 10 12.9 12.3 7.7 5 Determine whether carpeted rooms have more bacteria than uncarpeted rooms at the alpha = 0.01 level of significance. Normal probability plots include that the data are approximately normal and boxplots...
Full data set Uncarpeted A researcher wanted to determine if carpeted or uncarpeted rooms contain...
Full data set Uncarpeted A researcher wanted to determine if carpeted or uncarpeted rooms contain more bacteria. The table shows the results for the number of bacteria per cubic foot for both types of rooms. A normal probability plot and boxplot indicate that the data are approximately normally distributed with no outliers. Do carpeted rooms have more bacteria than uncarpeted rooms at the α 0.01 level of significance? 1 Click the icon to view the Student t-distribution table 13. Carpeted...
Read about Cokes strategy in Africa in the article below and discuss the ethics of selling...
Read about Cokes strategy in Africa in the article below and discuss the ethics of selling soft drinks to very poor people. Is this an issue that a company like Coke should consider? Africa: Coke's Last Frontier Sales are flat in developed countries. For Coke to keep growing, Africa is it By Duane Stanford Piles of trash are burning outside the Mamakamau Shop in Uthiru, a suburb of Nairobi, Kenya. Sewage trickles by in an open trench. Across the street,...
A researcher wanted to determine if carpeted rooms contain more bacteria than uncarpeted rooms. The table shows the results for the number of bacteria per cubic foot for both types of rooms Carpeted 6.4 7.4 9.5 8.2 15.9 12.6 13.2 11.6 Full data set Uncarpeted 6.2 4.2 8.1 12.9 4.5 11.9 11.1 4.4 Determine whether carpeted rooms have more bacteria than uncarpeted rooms at the a = 0.01 level of significance. Normal probability plots indicate that the data are approximately...
A researcher wanted to determine if carpeted rooms contain more bacteria than uncarpeted rooms. The table shows the results for the number of bacteria per cubic foot for both types of rooms. Full data set o Carpeted | Uncarpeted 10 14.5 12.4 || 7.1 13.1 4.7 6.4 8.7 8.7 || 4.6 13 7.9 15.2 6.3 11.6 7.5 Determine whether carpeted rooms have more bacteria than uncarpeted rooms at the a= 0.01 level of significance. Normal probability plots indicate that the...
rooms contained more bacteria than uncarpeted the air from the Researchers wanted to determine if carpeted rooms. To determine the amount of bacteria in a room, researchers pumped room over a Petri dish at the rate of I cubic foot per minute for eight carpeted rooms eight uncarpeted The results are presented in the table below. A normal probability plot and boxplot indicate that the data are approximately normally distributed with no outliers. 2) and rooms. Colonies of bacteria were...
Full data set Uncarpeted A researcher wanted to determine if carpeted or uncarpeted rooms contain more bacteria. The table shows the results for the number of bacteria per cubic foot for both types of rooms. A normal probability plot and boxplot indicate that the data are approximately normally distributed with no outliers. Do carpeted rooms have more bacteria than uncarpeted rooms at the α 0.01 level of significance? 1 Click the icon to view the Student t-distribution table 13. Carpeted...
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