Weight Loss of Newborns An obstetrician read that a newborn baby loses on average 7 ounces in the first two days of his or her life. He feels that in the hospital where he works, the average weight loss of a newborn baby is less than 7 ounces. A random sample of 35 newborn babies has a mean weight loss of 6.8 ounces. The population standard deviation is 1.3 ounces. Is there enough evidence at $α = 0.01$ to support his claim? Assume that the variable is normally distributed. Use the $P$ -value method with tables.
Part: $0 / 5$
Part 1 of 5
State the hypotheses and identify the claim.
$\begin{array}{l} H_{0} : ◻ ((Choose one) γ \\ H_{1} : ◻ ((Choose one) γ \end{array}$

The hypothesis test is a (Choose one) $v$ test.

Answer

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Answer

$left-tailed$

Steps

Step 1 ：State the null hypothesis $$ H_{0}$ and the alternative hypothesis $$ H_{1}$

Step 2 ：Identify the claim

Step 3 ：Determine the type of test

Step 4 ： $H_{0} : μ = 7$

Step 5 ： $H_{1} : μ < 7$

Step 6 ：The hypothesis test is a left-tailed test

Step 7 ： $H_{0} : μ = 7$

Step 8 ： $H_{1} : μ < 7$

Step 9 ： $left-tailed$