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    Hi, noticed there wasn't a thread for this. What answers did everyone get?
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    in order apart from the confidence interval q one was a t interval right?
    0.3306
    30.48
    1.969
    15.01
    0.2242
    14586
    3.512
    8part ii was 0.707
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    (Original post by mkwhater)
    in order apart from the confidence interval q one was a t interval right?
    0.3306
    30.48
    1.969
    15.01
    0.2242
    14586
    3.512
    8part ii was 0.707
    I seem to remember having all of them.

    I can't remember whether it was z or t - if the variance was known however, it would have been z
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    (Original post by Pinley)
    I seem to remember having all of them.

    I can't remember whether it was z or t - if the variance was known however, it would have been z
    they gave you the standard deviation so I think it was z
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    (Original post by mkwhater)
    in order apart from the confidence interval q one was a t interval right?
    0.3306
    30.48
    1.969
    15.01
    0.2242
    14586
    3.512
    8part ii was 0.707
    what 3.512 and 0.2242 the answer to? I dont remember those questions
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    (Original post by Sid1234)
    what 3.512 the answer to
    one of the last few q's i think it was chi squared can't remember
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    (Original post by mkwhater)
    one of the last few q's i think it was chi squared can't remember
    that was 3.911
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    Just tidying up the answers and adding a couple more, these are what I got anyway:

    1) 0.331
    2) Sum = 30.48 so reject H0.
    3i) [0.0584, 0.262]
    ii) [217, 231]
    4) t = 1.9686 so reject H0.
    5i) a = 9, b = 7
    ii) variance = 15.0
    6i) Z = 0.224 so accept H0.
    ii) n = 14,586
    7i) Show a = 12/31 or something.
    ii) E(X) = 1.53
    iii) didn't save my expected frequencies but ended up with 3.512 so accept H0.
    8i) Something along the lines of \frac{1}{20\sqrt{a\pi}} for 0 < a < 400pi?
    ii) 0.707
 
 
 
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