For the Following Question(s): a Researcher Is Interested in Whether

question 42

Multiple Choice

For the following question(s) : A researcher is interested in whether the color of an animal's surroundings affects learning rate. She tests 16 rats in a box with colorful wallpaper. Assume that it is known that the average rat can learn to run this particular maze (in a box without any special coloring) in 25 trials, with a variance of 64; the distribution is normal. The mean number of trials to learn the maze for the group with the colorful wallpaper is 11.
-What is the standard deviation of the distribution of means?

• A)64/16 = 4.00
• B)square root of (64/16)= 2.00
• C)64/11 = 5.82
• D)square root of (64/11)= 2.41

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Definitions:

Trimethylborate

A chemical compound with the formula B(OCH3)3, used as a reagent in organic synthesis and as a flame retardant.

M+2 Peak

A peak in mass spectrometry representing molecules with two more units of mass than the base molecular ion, often due to the presence of isotopes such as sulfur-34 or chlorine-37.

MS Peak

A peak in mass spectrometry that represents ions of specific mass-to-charge ratios, providing information about the molecular weight or structure of the analyte.

M+2 Peak

In mass spectrometry, this peak results from molecules containing two isotopes heavier than the most common isotopes (such as two chlorines), indicating the presence of elements like Sulfur or Chlorine.