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A First Course in Statistics, 12th Edition by James T. McClave, Terry T. Sincich

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Chapter 8

  1. 8.1 large, independent samples

  2. 8.3

    1. binomial

    2. normal

  3. 8.5

    1. .07±.067

    2. .06±.086

    3. −.15±.131

  4. 8.7 z=1.16, fail to reject H0

  5. 8.9

    1. .55

    2. .70

    3. −.15±.03

    4. 90% confidence

    5. Dutch boys

  6. 8.11

      1. (1) all Indian hospital patients admitted in January,

      2. (2) all Indian hospital patients admitted in May

    1. .083

    2. (.033, .133)

    3. yes

  7. 8.13

    1. b. H0:(p1−p2)=0,Ha:(p1−p2)>0

    2. c. z=1.27, fail to reject H0

  8. 8.15 no, z=1.70

  9. 8.17 z=8.34, reject H0

  10. 8.19 yes; z=2.13, reject H0 at α=.05

  11. 8.21 .48±.144 ; proportion greater for those who slept

  12. 8.23 Theory 1: z=2.79, reject H0, support theory; Theory 2: z=−.30, fail to reject H0, support theory

  13. 8.27 n1=n2=520

  14. 8.29

    1. n1=n2=5051

    2. impractical to obtain such a large sample

    3. difference almost meaningless

  15. 8.31 n1=520,n2=260

  16. 8.33 ...

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