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science

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A coin will be tossed 15 times, and I have to decide whether it lands heads with chance 0.6 or 0.3. I’ll test the hypotheses

Null: p = 0.6
Alternative: p = 0.3

1.

First, I will use a simple decision rule: if fewer than half the tosses are heads, I will choose p=0.3; if more than half the tosses are heads, I will choose p=0.6.

The significance level of this test is ____________%.

2.

The power of the test in Problem 3 is ____________%.

3.

Suppose I want to create a new decision rule that says, “If the number of heads is less than H, then I will choose p=0.3; otherwise I will choose p=0.6.” Here H is an integer in the range 0 through 15. Is it possible for me to choose H so that the new test has a smaller significance level as well as a higher power than the test in Problem 1?

-Maybe; there is not enough information to decide.
-Yes.
-No

  • science -

    will be problem 1 is the write in the problem 2

  • science -

    2.

    so The power of the test in Problem 1 is ____________%.

  • science -

    question# ans#
    1 2
    2 2
    3
    4
    5 3
    6
    7
    8
    9 1
    10 4
    11 1
    12
    13 1
    14 2
    15 3
    16 3
    17
    18
    19
    20 3
    21
    22 1
    23 3
    24 4

  • science -

    Thanks to stat001,

  • science -

    GUYS HERE ARE SOME OTHER ANSWERS
    Q3 25%

    Q4 43%

    Q6 29%

    Q7 51%

    Q8 17%

  • science -

    Q3, Q6, Q7, Q8 are wrong; didn't check Q4

    Q6 - 53.44
    Q7 - 60.56
    Q8 - 93

  • science -

    thanks argonaft plz do post others if you come up with the answers

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    any one who knows the answers to these questions 3 4 12 17 18 19 21

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    well the right answers are

    Q3 38%

    Q4 56%

    Q6 478%

    Q7 65%

    Q8 89%

  • science -

    Argonaft
    Something wrong in your 3:14am and 6:46am??? Pls explain

    Best

  • science -

    Argonaft your answers are wrong
    anyone plz help

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    Q3 - Binomial n=15 p=0.6 X<=7 21.31032%
    Q4 - Binomial n=15 p=0.3 X<=7 94.99875%
    Q6 - 53.4355%
    Q7 - 60.5645%
    Q8 - 93.15%
    Q12 - 14.26%

    Q17-19 & 21 - Any lights on this??

  • science -

    the second argonaft is not me...somebody play stupid games!!!

  • science -

    OK, sorry, Q17-19???
    Best

  • science -

    still working on these :)

  • science -

    Q17 - 37.5
    Q18 - 105.375
    Q19 - 35.125

    I think this is OK...
    Best to all

  • science -

    maria007- q21 plz

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    Did you check Q17to19? And by the way is a male not a female ...... AHAHA
    Best

  • science -

    q17-19 are correct

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    10x Mario007

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    Now Q21 - 44.61%
    Best

  • science -

    yup q21 is correct

  • science -

    I found some errors on the site, that made me get two obvious answers wrong, cause I didn't get a response and then... wrong answer...
    Anybody had the same???
    Best

  • science -

    With that I got a final 97%, not bad!
    Regards to you all.....

  • science -

    you all should be ashamed of your selves

  • science -

    Q23 - 0.75
    Q24 - 0.6

  • science -

    Hi, thanks for help. :)

    Can anyone put some explanation about questions 17 to 21... I tried to solve it, but didn't get any results that seemed ok (they all seemed absurd to me)... and all were far from these.

    How did you put the tables do calculate?

  • science -

    1.The treatment does something.
    2.False
    3.21.31
    4.94.998
    5.No
    6.53.435
    7.60.564
    8.93.15
    9.The average blood pressure in the population is 120 mm.
    10.t
    11.one-tailed Status
    12.14.26
    13.True
    14.at all private universities in the state.
    15.NA (that is, unknown based on the given information)
    16.probability histogram of the average number of hours worked in the week before the survey by a simple random sample of 1000 freshmen taken from private universities in the state
    17.37.5
    18.105.375
    19.35.125
    20.chi-square
    21.44.61
    22.support the statistician’s belief.
    23.0.75
    24.0.6

    Thanks to stat001 and Mario007

  • science -

    @Consolidated answers @Mario007 @Tuga
    -Thank you all..All the best!!!

    Just note this -I never post wrong answers- that second answer thread begin with 'Q3' by this username 'stat001' was not posted by me,I suspect some schizophrenic did that..

  • science -

    hahahahahahahahahah

  • science -

    sorry guys my bad

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    Thank you stat001 I used it just for check up, and it really helps, bnecause its important for me, as for many others. But I would like to say, that the someone who gives wrong answers by your nickname - it's not HE or SHE - IT, IT and even not schizophrenic, because schisophrenic is a person, this one "example" - only IT...

  • science -

    i posted some wrong answers sorry for that i will not do that again plz show some compassion

  • science -

    i know who you are stat001 and why you are posting answers i know you completely there is no respect in getting certificates if you don't obey the honor codes

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