A study was conducted to determine the effect of washing time (15 mins, 30 mins) and washing temperature (30degC, 40degC) on the dirt removal in clothes. Twenty pieces of homogenous cloth were stained with the same amount of dirt and subjected to the four treatment combinations, keeping constant the rotor speed. The amount of dirt removed (in mg) for five replications of each treatment combination were recorded. Shown below is the total dirt removed for each treatment combination. 1. Refer to the table: a. Is the simple effect of temperature for 15 minute washing time is 16.7? (Yes/No) b. Is the simple effect of time for 30degC washing temperature is 4.2? (Yes/No) 2. Refer to the plot shown: [if washing time is increased in interval of 15mins to 30 mins] a. (Increase/decrease) in amount of dirt as expected
A study was conducted to determine the effect of washing time (15 mins, 30 mins) and
washing temperature (30degC, 40degC) on the dirt removal in clothes. Twenty pieces of homogenous cloth were
stained with the same amount of dirt and subjected to the four treatment combinations, keeping constant
the rotor speed. The amount of dirt removed (in mg) for five replications of each treatment combination were
recorded. Shown below is the total dirt removed for each treatment combination.
1. Refer to the table:
a. Is the simple effect of temperature for 15 minute washing time is 16.7? (Yes/No)
b. Is the simple effect of time for 30degC washing temperature is 4.2? (Yes/No)
2. Refer to the plot shown: [if washing time is increased in interval of 15mins to 30 mins]
a. (Increase/decrease) in amount of dirt as expected
b. by factor of (2.8/3.2/4.1)
3. Is the statements below True or False?
a. No interaction between washing time and temperature (Ho for test for 2-way interaction)
b. Amount of dirt removed differs between washing time across levels of washing temperature (Ha for 2-way interaction)
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