US adults consume an average of 3,400 mg of sodium each day. We wanted to find out if a 5 minute health video would help people control thei

Question

US adults consume an average of 3,400 mg of sodium each day. We wanted to find out if a 5 minute health video would help people control their salt intake. After watching the video, the 36 participants in our study had a mean sodium intake of 3,200 mg with a standard deviation of 600 mg. What type of statistical test should we run to find out if there was a difference between our group and the general population

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Thiên Hương 4 years 2021-08-20T19:34:21+00:00 1 Answers 54 views 0

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  1. thongdat2
    0
    2021-08-20T19:35:24+00:00
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    Answer:

    a)  Z Test(n>30)

    b)  t=2.028

    Step-by-step explanation:

    Average A=3400

    Mean \=x=3200

    Sample size n=36

    Standard deviation \sigma=600mg

    Generally using the Z Test(n>30)

    Generally the equation for Standard Error S.E is mathematically given by

    S.E=\frac{600}{\sqrt{36}}}

    S.E=100

    Generally the equation for Z test is mathematically given by

    Z=\frac{\=x-A}{\sigma\sqrt{n}}

    Z=\frac{3200-3400}{600\sqrt{36}}

    Z=-2

    From table

    T critical= (Z,df)

    Where

    df=n-1

    df=35

    Therefore

    t=2.028

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