Biology Forums - Study Force

Find the standardized test statistic estimate, z, to test the hypothesis that p1 > p2. Use a = 0.01. The sample statistics listed below are from independent samples. Sample statistics: n1 = 100, x1 = 38, and n2 = 140, x2 = 50
 
  A) 0.362 B) 2.116 C) 1.324 D) 0.638

Q. 2

In how many ways can a club choose a president, a treasurer, a secretary, and three other committee members (with identical duties) from a group of 13 candidates?
 
  A) 205,920 B) 1,235,520 C) 4,826,809 D) 1716

Q. 3

Find the standardized test statistic, z to test the hypothesis that p1 = p2. Use a = 0.05. The sample statistics listed below are from independent samples. Sample statistics: n1 = 50, x1 = 35, and n2 = 60, x2 = 40
 
  A) 0.374 B) 0.982 C) 1.328 D) 2.361

Q. 4

A confidence interval was used to estimate the proportion of math majors that are female. A random sample of 72 math majors generated the following confidence interval: (0.438, 0.642).
 
  Using the information above, what size sample would be necessary if we wanted to estimate the true proportion to within 4 using 99 reliability? A) 1030 B) 1037 C) 1078 D) 995

Q. 5

In how many ways can 6 women and 3 men be seated in a row of 9 seats at a movie theater assuming that all the women must sit together and all the men must sit together?
 
  A) 8640 B) 4320 C) 362,880 D) 512

Q. 6

Last year batting averages in professional baseball averaged 0.255 with a high of 0.320 and a low of 0.219 (minimum 250 at-bats). Based on this information, which measure of variation could be calculated?
 
  A) range B) variance
  C) standard deviation D) percentile

Q. 7

A license plate is to consist of 3 letters followed by 5 digits. Determine the number of different license plates possible if the first letter must be an K , L , or M and repetition of letters and numbers is not permitted.
 
  A) 54,432,000 B) 9,072,000 C) 272,160,000 D) 54,522,000

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Were some really tough homework problems!