Biology Forums - Study Force

Assuming the distribution of swelling status is the same for the two treatment populations, how many chicken pox vaccinated subjects would you expect to have major swelling around the injection site?
  1.76.67
  2.38.33
  3.54

Q. 2

What is the appropriate chi-square test to assess if the distribution of swelling status is the same for the two treatment populations?
  1.Test for homogeneity
  2.Test for independence
  3.Test for goodness of fit

Q. 3

Minitab output to determine statistical independence between gender and leisure activity is shown below. What is the value for X2 ?
  Chi-Square Test: Male, Female
  Expected counts are printed below observed counts
  Chi-Square contributions are printed below expected counts
   Male Female Total
   1. 5 10 15
   9.00 6.00
   1.778 2.667
   2. 22 8 30
   18.00 12.00
   0.889 1.333
   3. 19 6 25
   15.00 10.00
   1.067 1.600
   4. 14 16 30
   18.00 12.00
   0.889 1.333
  Total 60 40 100
  Chi-Sq = ________, DF = 3, P-Value = 0.009
  1.100
  2.12.5
  3.11.56
  4.4

Q. 4

Forty subjects are asked about their preferred method to obtain the national news daily. They respond in five categories; national newspaper, local newspaper, internet, nightly TV news, or from another individual.
  The test statistic was computed to be X2 = 8.25. What is the correct statistical interpretation of this value at the =0.10 level?
  1.Fail to reject the null.
  2.Reject the null.

Q. 5

Forty subjects are asked about their preferred method to obtain the national news daily. They respond in five categories; national newspaper, local newspaper, internet, nightly TV news, or from another individual. If the observed values are all very close to the expected values, the X2 statistic should be ______.
  1.relatively large
  2.more extreme than X2 critical
  3.negative
  4.close to zero

Q. 6

Forty subjects are asked about their preferred method to obtain the national news daily. They respond in five categories; national newspaper, local newspaper, internet, nightly TV news, or from another individual.
  How many degrees of freedom does the hypothesis test to determine if there is a statistical difference in preference have?
  1.39
  2.4
  3.8
  4.5

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