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LiRa [457]
3 years ago
11

Suppose that a random sample of 50 bottles of a particular brand of cough syrup is selected and the alcohol content of each bott

le is determined. Let m denote the average alcohol content for the population of all bottles of the brand under study. Suppose that the resulting 95% confidence interval is (7.8, 9.4). a. Would a 90% confidence interval calculated from this same sample have been narrower or wider than the given interval
Mathematics
1 answer:
timofeeve [1]3 years ago
6 0

Answer:

95% confidence interval will be narrower.

Step-by-step explanation:

We are given the following in the question:

Sample size, n = 50

95% confidence interval for average alcohol content:

(7.8, 9.4)

a) 90% confidence interval

  • If we calculate a 90% confidence interval, then the confidence interval become narrower because we decreased the confidence percentage.
  • This would decrease the margin of error.
  • Hence, the confidence interval become narrower.
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earnstyle [38]
6x6x6=216
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3 0
3 years ago
Find the average rate of horizontal change of the ball the 1.6 sec.
djverab [1.8K]

a)

the average speed, well it does 10 ft in 1.6 secs, so is simply their quotient, 10/1.6 = 6.25 ft/s on average.


b)

over the horizontal, well, it covered horizontally 9.25 ft in those 1.6 secs, so their quotient is 9.25/1.6 = 5.78125 ft/s on average.


c)

we don't know the vertical distance, but


\bf \textit{using the pythagorean theorem}
\\\\
c^2=a^2+b^2\implies \sqrt{c^2-a^2}=b
\qquad
\begin{cases}
c=\stackrel{10}{hypotenuse}\\
a=\stackrel{9.25}{adjacent}\\
b=opposite\\
\end{cases}
\\\\\\
\sqrt{10^2-9.25^2}=b\implies \sqrt{14.4375}=b\implies 3.8\approx b


so, it covered vertically about 3.8 ft in those 1.6 secs, so then 3.8/1.6 = 2.375 ft/s on average

7 0
3 years ago
Read 2 more answers
Four less than the product of 8 and a number equals 6
docker41 [41]

The equation will be 6x - 4= 8.

Solve the equation: 6x - 4 = 8 + 4 + 4.

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Hopefully, that helps

8 0
2 years ago
A weather forecaster reported that the total amount of rainfall for the month was 0.95 inch. He also reported that this amount w
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Answer:

1.3 in

Step-by-step explanation:

x = average amt of rainfall in the last 10 years

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3 years ago
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alexandr402 [8]

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Brainliest to help me reach expert? ;)

Hope this helps

8 0
3 years ago
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