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german
3 years ago
14

Solve pls brainliest

Mathematics
2 answers:
Ratling [72]3 years ago
8 0

Answer:

15.75

Step-by-step explanation:

lakkis [162]3 years ago
5 0

Answer: 15.75

Step-by-step explanation: To calculate, we do 45 x 35 / 100 which will equal 15.75

Hope this helps! Please mark me as brainliest!

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jenyasd209 [6]

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Lexie, a bowler, claims that her bowling score is more than 140 points, on average. Several of her teammates do not believe her,
Crazy boy [7]

Answer:

The  test statistic is  t  = 3.744

Step-by-step explanation:

From the question we are told that

  The population mean is  \mu  =  140

  The  The  level of significance is  \alpha  =  0.05

  The  sample size is  n =  18

   The  null hypothesis is  H_o :  \mu =  140

    The  alternative hypothesis is  H_a  :  \mu > 140

    The sample mean is  \= x  =  155

     The  standard deviation is  \sigma  =  17

Generally the test statistics is mathematically represented as

       t  =  \frac{\= x  - \mu }{ \frac{ \sigma}{ \sqrt{n} } }

substituting values

      t  =  \frac{ 155  - 140 }{ \frac{ 17 }{ \sqrt{18} } }

      t  = 3.744

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3 years ago
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mr_godi [17]
0.05 is 1/10 the value of 0.5.
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