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2 years ago

PLSS HELP ASAP THANKS

Mathematics

2 answers:

11111nata11111 [884]2 years ago

7 0

Answer: the last option. 2(n +4)

Step-by-step explanation:

For the “and 4” part:

Generally, and means “in addition to” so that means that “and 4”,really just means “+4”.

2 • the sum and 4

The sum is represented by N, making it 2•N. However, there is also the “+4” part. And it’s “the sum and 4” soooo it would be simply “2(n+4)” implicating the the 2 • n and the n+4

Put the 2 parts together, and you get 2(n+4)

Arlecino [84]2 years ago

3 0

Answer: umm send me the um link

Step-by-step explanation:

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A sample of students from an introductory psychology class were polled regarding the number of hours they spent studying for the

Anni [7]

Answer:

$8.68,13.16$

Step-by-step explanation:

Hint- First we have to calculate the mean and standard deviation of the sample and then applying formula for confidence interval we can get the values.

Mean of the sample is,

$\mu=\dfrac{\sum _{i=1}^{24}a_i}{24}=\dfrac{262}{24}=10.92$

Standard deviation of the sample is,

$\sigma =\sqrt{\dfrac{\sum _{i=1}^{24}\left(x_i-10.92\right)^2}{24-1}}=5.6$

The confidence interval will be,

$=\mu \pm Z\dfrac{\sigma}{\sqrt{n}}$

Here,

Z for 95% confidence interval is 1.96, and n is sample size which is 24.

Putting the values,

$=10.92 \pm 1.96\cdot \dfrac{5.6}{\sqrt{24}}$

$=10.92 \pm 2.24$

$=8.68,13.16$

Confidence interval is used to express the degree of uncertainty associated with a sample.

95% confidence interval means that if we used the same sampling method to select different samples and calculate an interval, we would expect the true population parameter to fall within the interval for 95% of the time.

5 0

2 years ago

F. The school aims to raise a minimum of $5,250 after paying for all the expenses. If the

bearhunter [10]

You need 105 children to meet the minimum.

7 0

3 years ago

90 + 12 = 6(15 + 12) Yes or No

quester [9]

Answer:

This is false.

Step-by-step explanation: