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Sonja
2 months ago
10

A hypothesis regarding the weight of newborn infants at a community hospital is that the mean is 6.6 pounds. A sample of seven i

nfants is randomly selected and their weights at birth are recorded as 9.0, 7.3, 6.0, 8.8, 6.8, 8.4, and 6.6 pounds. What is the decision for a statistical significant change in average weights at birth at the 5% level of significance? Select one: a. Fail to reject the null hypothesis. b. Reject the null hypothesis and conclude the mean is higher than 6.6 lb. c. Reject the null hypothesis and conclude the mean is lower than 6.6 lb. d. Cannot calculate because the population standard deviation is unknown.
Mathematics
1 answer:
Inessa [12.5K]2 months ago
6 0
If we compare the p value to a predetermined significance level \alpha=0.05 we conclude that we cannot reject the null hypothesis, indicating insufficient evidence to assert that the true average is different from 6.6 pounds.

The best conclusion is:

a. Failing to reject the null hypothesis.

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3 months ago
Luca decides to play Wheel of Letters. To play the game, contestants spin a wheel with 26 equal sections, lettered A through Z.
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2 months ago
In 2010, Rafik bought a house. In 2015, Rafik sold the house to Bianca. He made a 20% profit on the sale. In 2019, Bianca sold t
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Answer:

£170,000

Step-by-step explanation:

En 2010, Rafik adquirió una casa. Supongamos que el precio de compra fue $x. En 2015, Rafik vendió la casa a Bianca obteniendo un 20% de ganancia. Esto se traduce en 20% de x lo que equivale a 0.2 × x = 0.2x. Por tanto, Rafik vendió la casa a Bianca por x + 0.2x = 1.2x. Bianca compró la casa a 1.2x.

La casa fue vendida por Bianca en 2019 con una pérdida del 5%. Esto implica que el 5% de pérdida equivale a 0.05(1.2x) = 0.06x.

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⇒ 1.14x = 193,800

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Rafik pagó £170,000 por la casa en 2010.

7 0
2 months ago
Find the value of x in the triangle shown below
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The value of x is 12. This can be found using the Pythagorean theorem with c equal to 13 and b equal to 5, where a equals x.
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2 months ago
Read 2 more answers
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