Question

- The 95% confidence interval for
**all**the mean weight of infants born to mothers who smoke is µ = 5.40 to 6.80 pounds. The mean weight for a random sample of 25 newborns in this region is 7.2 pounds with a standard deviation (s) of 0.85 pounds.- Is the birth weight of the infants in this sample significantly different from that of the general population at α=0.05? (10 points) Explain your response (4 pts).

Please show work . Thank you .

Answer #1

The mean birth weight of male babies born to 121 mothers taking
a vitamin supplement is
3.633.63
kilograms with a standard deviation of
0.630.63
kilogram. Use a 0.05 significance level to test the claim that
the mean birth weight of all babies born to mothers taking the
vitamin supplement is equal to 3.39 kilograms, which is the mean
for the population of all male babies.
State the null and alternative hypotheses. Find the z-score and
the P value and make...

A hypothesis regarding the weight of newborn infants at a
community hospital is that the mean is 6.6 pounds. A sample of
seven infants is randomly selected and their weights at birth are
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α = 0.05, what is the critical t-value?
Multiple Choice
−2.365
±1.96
±2.365
±2.447

The mean birth weight of infants in the United States is μ =
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N(μ, σ2), where μ and σ2 are
unknown. 25 new-born infants randomly selected in
Jerusalem yielded a sample mean of 3515 grams and a standard
deviation of s = 500 grams. Use the data to test the null
hypothesis H0: μ = 3315...

4. The mean weight of newborn infants at a community hospital is
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c. State critical value at α = .05
d. State conclusion

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downward). A sample of 27 individuals in buildings having an
elevator yielded sample mean 196 pounds and sample standard
deviation 35 pounds. Assume the population is normally distributed.
(a) State the null and alternative hypotheses for the test.
13A. [2 points] Construct the rejection region for...

Q: A 95% confidence interval for the mean is (102, 106). If we
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100, the p-value will be:
(A) larger than 0.05
(B) smaller than 0.05
(C) larger than 0.01
(D) smaller than 0.01
Q: Suppose you want to conduct a t-test using ? = 0.05. You take
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and obtain the sample mean and sample standard deviation. As a
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BIOS 376 Homework 7
1. A professor claims that the mean IQ for college students is
92. He collects a random sample of 85 college students to test this
claim and the mean IQ from the sample is 84.
(a) What are the null and alternative hypotheses to test the
initial claim? (1 pt)
(b) Using R, compute the test statistic. Assume the population
standard deviation of IQ scores for college students is 17.6
points. (1 pt)
(c) Using R,...

Do all the following problems.
I. Choose the best answer for each
multiple choice. Please use CAPITAL letters to indicate your answer
and write neatly. (30 points)
1. ____ 4.____ 7. ____ 10.____ 13.
____
2. ____ 5.____ 8. ____ 11.____ 14.
____
3. ____ 6.____ 9. ____ 12.____ 15.
____
Whenever the population standard deviation is unknown and the
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B....

1. A city official claims that the proportion of all commuters
who are in favor of an expanded public transportation system is
50%. A newspaper conducts a survey to determine whether this
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commuters, the survey finds that 90 of them reply yes when asked if
they support an expanded public transportation system. Test the
official’s claim at α = 0.05.
2. A survey of 225 randomly chosen commuters are asked...

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