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?
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From given information the null and alternative hypothess are,
P-value for this test is 0.25
since, p-value = 0.25 > 0.05, we fail to reject the null hypothesis ( H0 ).
Conclusion : 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.
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...
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...
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...
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 Uncarpeted 1616 8.28.2 8.98.9 11.711.7 4.14.1 13.313.3 9.59.5 13.513.5 15.915.9 7.27.2 12.312.3 1212 8.18.1 66 9.69.6 13.313.3 Determine whether carpeted rooms have more bacteria than uncarpeted rooms at the α=0.05 level of significance. Normal probability plots indicate that the data are approximately normal and boxplots indicate that...
Carpeted Uncarpeted 12.2 7.5 10.8 10.9 12.8 6.7 11.6 6.7 14.6 5.7 14.1 7.3 15.4 7.6 15 6.8 14.6 7 11.5 8.6 16.9 7.7 14.4 8.8 11.2 9.1 13.6 8.9 15.8 8.9 13.6 8.5 16.5 9.9 13.6 6.7 Problem 2: Appropriateness of Inference (again) For the following scenario, answer the following questions. The underlined text is the name of the StatCrunch data set to be used for that part. Please note, do not conduct inference in this problem; just answer...
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...
There is pesticide banned in the United States for its danger to living things called DDT. In an experiment, 6 mice were exposed to DDT poisoning and 6 mice were not. For each mouse in the experiment, a measurement of their body sensitivity was recorded. The researchers suspected that the mean body sensitivity for mice exposed to DDT is greater than that for mice not poisoned. The data follow: Mice with DDT: 12.207 16.869 25.050 22.429 8.456 20.589 Mice without...
There is pesticide banned in the United States for its danger to living things called DDT. In an experiment, 6 mice were exposed to DDT poisoning and 6 mice were not. For each mouse in the experiment, a measurement of their body sensitivity was recorded. The researchers suspected that the mean body sensitivity for mice exposed to DDT is greater than that for mice not poisoned. The data follow: Mice with DDT: 12.207 16.869 25.050 22.429 8.456 20.589 Mice without...