Biology Forums - Study Force

An advertising company has developed a new ad for one of the national car manufacturing companies. The ad agency is interested in testing whether the proportion of favorable response to the ad is the same between male adults versus female adults.
 
  It plans on conducting the test using an alpha level equal to 0.05. A sample of 100 adults of each gender will be used in the study. Each person will be asked to view the ad and indicate whether they find the ad to be pleasing or not. Given this information, what is the critical value?A) z = 1.645
  B) t = 1.96
  C) z = 1.96
  D) Can't be determined without knowing the results of the sample.

Q. 2

R-charts are ________ if the calculations are done manually by a process worker on the factory floor.
 
  A) more accurate than charts based on the standard deviation
  B) more useful than x-charts
  C) the only way to determine if a process is under control
  D) easy to construct and use

Q. 3

If you wish to construct a graph of a relative frequency distribution, you would most likely construct an ogive.
 
  Indicate whether the statement is true or false

Q. 4

To increase productivity, workers went through a training program. The management wanted to know the effectiveness of the program. A sample of seven workers was taken and their daily production rates before and after the training are shown below.
 
  Worker Before After1 18 222 23 253 25 274 22 255 20 246 21 197 19 20Based on the data, the training program is:A) effective.
  B) ineffective.
  C) neither effective nor ineffective.
  D) None of the above

Q. 5

Which of the following statements is true with respect to the confidence level associated with an estimation application?
 
  A) The confidence level is a percentage value between 50 and 100 that corresponds to the percentage of all possible confidence intervals, based on a given sample size, that will contain the true population value.
  B) The probability that the confidence interval estimate will contain the true population value.
  C) The degree of accuracy associated with the confidence interval estimate.
  D) None of the above

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