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Svetllana [295]
2 years ago
8

Can someone help with question 1 please

Mathematics
2 answers:
allochka39001 [22]2 years ago
4 0

Answer: B

Step-by-step explanation:

The answer is B because of the equal sign in the middle meaning that both the sin and cos are equal

zmey [24]2 years ago
4 0
The answer is B since you are equally putting it.
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Suppose that a random sample of 10 adults has a mean score of 62 on a standardized personality test, with a standard deviation o
aniked [119]

Answer:

The 90% confidence interval for the mean score of all takers of this test is between 59.92 and 64.08. The lower end is 59.92, and the upper end is 64.08.

Step-by-step explanation:

We have that to find our \alpha level, that is the subtraction of 1 by the confidence interval divided by 2. So:

\alpha = \frac{1-0.9}{2} = 0.05

Now, we have to find z in the Ztable as such z has a pvalue of 1-\alpha.

So it is z with a pvalue of 1-0.05 = 0.95, so z = 1.645

Now, find the margin of error M as such

M = z*\frac{\sigma}{\sqrt{n}}

In which \sigma is the standard deviation of the population and n is the size of the sample.

M = 1.645*\frac{4}{\sqrt{10}} = 2.08

The lower end of the interval is the sample mean subtracted by M. So it is 62 - 2.08 = 59.92

The upper end of the interval is the sample mean added to M. So it is 62 + 2.08 = 64.08.

The 90% confidence interval for the mean score of all takers of this test is between 59.92 and 64.08. The lower end is 59.92, and the upper end is 64.08.

5 0
2 years ago
These points are linear.<br> Find the slope.<br> x0 |1 |2|3|4|5<br> y|0|2|4|6|8|10<br> slope = [?]
jolli1 [7]

Answer:

Step-by-step explanation:

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2 years ago
Really need help with this question ASAP!!!
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H=-5(t^2 - 16t)

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Vertex is at (8, 320)

The max height is 320 m.
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3 years ago
Margot purchases book tees from the warehouse and marks up those prices by 20% for retail sale when tease go on sold for more th
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