Biology Forums - Study Force

The range is an insensitive measure of data variation for large data sets because two data sets can have the same range but be vastly different with respect to data variation.
 
  A) True B) False

Q. 2

Before a new phone system was installed, the amount a company spent on personal calls followed a normal distribution with an average of 600 per month and a standard deviation of per month. Refer to such expenses as PCE's (personal call expenses).
 
  Find the probability that a randomly selected month had PCE's below 450.
  A) 0.9987 B) 0.7500 C) 0.2500 D) 0.0013

Q. 3

Before a new phone system was installed, the amount a company spent on personal calls followed a normal distribution with an average of 400 per month and a standard deviation of 50 per month.
 
  Refer to such expenses as PCE's (personal call expenses). Using the distribution above, what is the probability that during a randomly selected month PCE's were between 275.00 and 490.00?
  A) .9579 B) .0001 C) .9999 D) .0421

Q. 4

The amount of soda a dispensing machine pours into a 12-ounce can of soda follows a normal distribution with a standard deviation of 0.24 ounce.
 
  Every can that has more than 12.60 ounces of soda poured into it causes a spill and the can must go through a special cleaning process before it can be sold. What is the mean amount of soda the machine should dispense if the company wants to limit the percentage that must be cleaned because of spillage to 3?
  A) 13.1208 ounces B) 13.0512 ounces C) 12.1488 ounces D) 12.0792 ounces

Q. 5

The amount of soda a dispensing machine pours into a 12-ounce can of soda follows a normal distribution with a mean of 12.09 ounces and a standard deviation of 0.06 ounce.
 
  Each can holds a maximum of 12.15 ounces of soda. Every can that has more than 12.15 ounces of soda poured into it causes a spill and the can must go through a special cleaning process before it can be sold. What is the probability that a randomly selected can will need to go through this process?
  A) .8413 B) .3413 C) .1587 D) .6587

Q. 6

The volume of soda a dispensing machine pours into a 12-ounce can of soda follows a normal distribution with a mean of 12.42 ounces and a standard deviation of 0.28 ounce.
 
  The company receives complaints from consumers who actually measure the amount of soda in the cans and claim that the volume is less than the advertised 12 ounces. What proportion of the soda cans contain less than the advertised 12 ounces of soda?
  A) .0668 B) .9332 C) .5668 D) .4332

Q. 7

The weight of corn chips dispensed into a 24-ounce bag by the dispensing machine has been identified as possessing a normal distribution with a mean of 24.5 ounces and a standard deviation of 0.2 ounce.
 
  What proportion of the 24-ounce bags contain more than the advertised 24 ounces of chips?
  A) .9938 B) .5062 C) .4938 D) .0062

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