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eduard
3 years ago
10

1 Patricia is trying to compare the average rainfall of

Mathematics
1 answer:
Troyanec [42]3 years ago
3 0

Answer:

number 3

Step-by-step explanation:

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PLSS HELP ASAP!!<br> I WILL GIVE YOU BRAINLYEST!! <br> *LOOK AT THE PICTURE*
irina [24]

Answer:

A

Step-by-step explanation:

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7 0
2 years ago
Read 2 more answers
A bookshelf can hold a maximum of 45 books. Let b represents the number of books to be shelved. Which inequality represents how
leonid [27]
The number of books that can be shelved is 45. So then we know that the amount that need to be shelved <em>can</em> be 45, if the bookshelf had 0 books on it. This means that it can have the equal part of the inequality sign.

However, the amount of book that need to be shelved cannot <em>exceed</em> 45, so b must be less than 45.

Therefore, the answer must be D) b ≤ 45.
7 0
3 years ago
A survey was conducted to determine the average age at which college seniors hope to retire in a simple random sample of 101 sen
tatyana61 [14]

Answer:

96% confidence interval for desired retirement age of all college students is [54.30 , 55.70].

Step-by-step explanation:

We are given that a survey was conducted to determine the average age at which college seniors hope to retire in a simple random sample of 101 seniors, 55 was the  average desired retirement age, with a standard deviation of 3.4 years.

Firstly, the Pivotal quantity for 96% confidence interval for the population mean is given by;

                         P.Q. =  \frac{\bar X-\mu}{\frac{s}{\sqrt{n} } }  ~ t_n_-_1

where, \bar X = sample average desired retirement age = 55 years

            \sigma = sample standard deviation = 3.4 years

            n = sample of seniors = 101

            \mu = true mean retirement age of all college students

<em>Here for constructing 96% confidence interval we have used One-sample t test statistics as we don't know about population standard deviation.</em>

<u>So, 96% confidence interval for the population mean, </u>\mu<u> is ;</u>

P(-2.114 < t_1_0_0 < 2.114) = 0.96  {As the critical value of t at 100 degree

                                               of freedom are -2.114 & 2.114 with P = 2%}  

P(-2.114 < \frac{\bar X-\mu}{\frac{s}{\sqrt{n} } } < 2.114) = 0.96

P( -2.114 \times {\frac{s}{\sqrt{n} } } < {\bar X-\mu} < 2.114 \times {\frac{s}{\sqrt{n} } } ) = 0.96

P( \bar X-2.114 \times {\frac{s}{\sqrt{n} } } < \mu < \bar X+2.114 \times {\frac{s}{\sqrt{n} } } ) = 0.96

<u>96% confidence interval for</u> \mu = [ \bar X-2.114 \times {\frac{s}{\sqrt{n} } } , \bar X+2.114 \times {\frac{s}{\sqrt{n} } } ]

                                           = [ 55-2.114 \times {\frac{3.4}{\sqrt{101} } } , 55+2.114 \times {\frac{3.4}{\sqrt{101} } } ]

                                           = [54.30 , 55.70]

Therefore, 96% confidence interval for desired retirement age of all college students is [54.30 , 55.70].

7 0
3 years ago
A teacher that likes two different numbers p and q and states that p plus q equals 0 which statement could be true about these t
pychu [463]
D, one number is positive and the other is negative. The only way it could equal 0 is to cross the other out. An example is, -5+5=0
7 0
3 years ago
What is the vertex of the parabola?<br><br>A. (-1,0)<br>B. (0,-3)<br>C. (1,-4)<br>D. (3,0)​
katovenus [111]

d. (1,-4) is the answer

7 0
3 years ago
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