Question

Industrial wastes and sewage dumped into our rivers and streams absorb oxygen and thereby reduce the amount of dissolved oxygen available for fish and other forms of aquatic life. One state agency requires a minimum of 5 parts per million (ppm) of dissolved oxygen in order for the oxygen content to be sufficient to support aquatic life. Six water specimens taken from a river at a specific location during the low-water season (July) gave readings of 4.9, 5.1, 4.9, 5.1, 5.0, and 4.6 ppm of dissolved oxygen. Do the data provide sufficient evidence to indicate that the dissolved oxygen content is less than 5 ppm? Test using 𝛼 = 0.05. State the test statistic. (Round your answer to three decimal places.) State the rejection region. (If the test is one-tailed, enter NONE for the unused region. Round your answers to three decimal places.)

          Industrial wastes and sewage dumped into our rivers and streams
absorb oxygen and thereby reduce the amount of dissolved oxygen
available for fish and other forms of aquatic life. One state
agency requires a minimum of 5 parts per million (ppm) of dissolved
oxygen in order for the oxygen content to be sufficient to support
aquatic life. Six water specimens taken from a river at a specific
location during the low-water season (July) gave readings of 4.9,
5.1, 4.9, 5.1, 5.0, and 4.6 ppm of dissolved oxygen. Do the data
provide sufficient evidence to indicate that the dissolved oxygen
content is less than 5 ppm? Test using 𝛼 = 0.05.
State the test statistic. (Round your answer to three decimal
places.)
State the rejection region. (If the test is one-tailed, enter
NONE for the unused region. Round your answers to three decimal
places.)

Added by Salvador R.

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