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An outbreak of Salmonella-related illness was attributed to ice cream produced at a certain factory. Scientists...

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Statistics

An outbreak of Salmonella-related illness was attributed to icecream produced at a certain factory. Scientists are interested toknow whether the mean level of Salmonella in the ice cream isgreater than 0.2 MPN/g. A random sample of 20 batches of ice creamwas selected and the level of Salmonella measured.   Thelevels (in MPN/g) were:

0.593, 0.142, 0.329, 0.691, 0.231, 0.793, 0.519, 0.392, 0.418,0.219

0.684, 0.253, 0.439, 0.782, 0.333, 0.894, 0.623, 0.445, 0.521,0.544

            

  1. (0.5 point) Read the data in R using a vector. Show your codesonly but not the output.

  1. (0.5 point) State the two hypotheses of interest.

  1. (1 point) Is there evidence that the mean level of Salmonellain the ice cream is greater than 0.2 MPN/g? Assume a Normaldistribution and use α = 0.05. Show your codes and result/outputfrom R.

  1. (1 point) Interpret your finding in (c).

Answer & Explanation Solved by verified expert
4.4 Ratings (630 Votes)
ab Let denotes the mean level of    See Answer
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