A local hospital wanted to see if the claim was true and randomly sampled 24 baby's weights and found an average weight of 7.4 pounds. Test the claim using a 5% level of significance that the mean weight significantly smaller than the national average of 7.5 pounds. Use the population standard deviation of 1.25 pounds. Give answer to at least 4 decimal places. What are the correct hypotheses? (Select the correct symbols.) Ho: Select an answer ✓ Test Statistic = ? ✓ H₁: Select an answer ? ✓ Based on the hypotheses, find the following: p-value = pounds pounds The correct decision is to Select an answer
A local hospital wanted to see if the claim was true and randomly sampled 24 baby's weights and found an average weight of 7.4 pounds. Test the claim using a 5% level of significance that the mean weight significantly smaller than the national average of 7.5 pounds. Use the population standard deviation of 1.25 pounds. Give answer to at least 4 decimal places. What are the correct hypotheses? (Select the correct symbols.) Ho: Select an answer ✓ Test Statistic = ? ✓ H₁: Select an answer ? ✓ Based on the hypotheses, find the following: p-value = pounds pounds The correct decision is to Select an answer
College Algebra (MindTap Course List)
12th Edition
ISBN:9781305652231
Author:R. David Gustafson, Jeff Hughes
Publisher:R. David Gustafson, Jeff Hughes
Chapter4: Polynomial And Rational Functions
Section4.6: Rational Functions
Problem 11SC: Find the mean hourly cost when the cell phone described above is used for 240 minutes.
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Question
Transcribed Image Text:The weights of newborn children in the United States vary according to the normal distribution with mean 7.5
pounds and standard deviation 1.25 pounds. An article in the The Wall Street Journal claims that the average
birth weight is decreasing over time.
Steady Decline
Change in the average birth
weight of babies born in the
U.S. since 1990, in ounces
-0.5
-1.0
-1.5
-2.0
Cer
'05
1990
195
'00
*Born between 37 and 41 weeks and not
including multiple births
Source: Obstetrics and Gynecology
Transcribed Image Text:A local hospital wanted to see if the claim was true and randomly sampled 24 baby's weights and found an
average weight of 7.4 pounds. Test the claim using a 5% level of significance that the mean weight significantly
smaller than the national average of 7.5 pounds. Use the population standard deviation of 1.25 pounds. Give
answer to at least 4 decimal places.
What are the correct hypotheses? (Select the correct symbols.)
Ho: Select an answer ✓
Test Statistic =
H₁: Select an answer ✓ ? ✓
Based on the hypotheses, find the following:
p-value
? ✓
=
pounds
pounds
The correct decision is to Select an answer
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