sol_hw_05 - Solutions - Sampling Distributions 7.6 Exit...

Info iconThis preview shows pages 1–2. Sign up to view the full content.

View Full Document Right Arrow Icon

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
This is the end of the preview. Sign up to access the rest of the document.

Unformatted text preview: Solutions - Sampling Distributions 7.6 Exit poll and n: a) The interval of values within the sample proportion will almost certainly fall within three standard errors of the mean: 0.53 to 0.59. b) Based on the interval calculated in (a), it would be unusual to observe a sample proportion of 0.60. c) 0095 . 559 . 565 .- = 0.63. Since 0.565 falls 0.63 standard deviations above the mean, it would not be unusual to observe a sample proportion of 0.565. 7.8 Relative frequency of heads : a) sample proportion probability 0 0.5 1 0.5 b) sample proportion probability 0 0.25 0.50 1 0.25 c) sample proportion probability 0.125 1/3 0.375 2/3 0.375 1 0.125 d) The distribution begins to take a bell shape. 7.10 Effect of n on sample proportion : a) (i) standard error = ( 29 n p p- 1 = ( 29 100 5 . 1 5 .- = 0.05 (ii) standard error = ( 29 n p p- 1 = ( 29 1000 5 . 1 5 .- = 0.0158 b) The sample proportion is likely to fall within three standard errors of the mean. In (i), with a mean of 0.50 and a standard error of 0.05, this would be between 0.35 and 0.65. In (ii), with a mean of 0.50 and a standard error of 0.0158, this would be between 0.45 and 0.55. between 0....
View Full Document

Page1 / 3

sol_hw_05 - Solutions - Sampling Distributions 7.6 Exit...

This preview shows document pages 1 - 2. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online