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2 years ago

6

Rachel is mailing packages. Each small package costs her $2.60 to send. Each large package costs her$4.10. How much will it cost

her to send 3 small packages and 4 large packages?

1 answer:

Tresset [83]2 years ago

3 0

Answer:

$7.8

Step-by-step explanation:

$2.6 x 3

= $7.8

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Suppose that at a state college, a random sample of 41 students is drawn, and each of the 41 students in the sample is asked to

ra1l [238]

Answer:

The confidence interval for 90% confidence would be narrower than the 95% confidence

Step-by-step explanation:

From the question we are told that

The sample size is n = 41

For a 95% confidence the level of significance is $\alpha = [100 - 95]\% = 0.05$ and

the critical value of $\frac{\alpha }{2}$ is $Z_{\frac{\alpha }{2} } =Z_{\frac{0.05 }{2} }= 1.96$

For a 90% confidence the level of significance is $\alpha = [100 - 90]\% = 0.10$ and

the critical value of $\frac{\alpha }{2}$ is $Z_{\frac{\alpha }{2} } =Z_{\frac{0.10 }{2} }= 1.645$

So we see with decreasing confidence level the critical value decrease

Now the margin of error is mathematically represented as

$E = Z_{\frac{\alpha }{2} } * \frac{s}{\sqrt{n} }$

given that other values are constant and only $Z_{\frac{\alpha }{2} }$ is varying we have that

$E\ \ \alpha \ \ Z_{\frac{\alpha }{2} }$

Hence for reducing confidence level the margin of error will be reducing

The confidence interval is mathematically represented as

$\= x - E < \mu < \= x + E$

Now looking at the above formula and information that we have deduced so far we can infer that as the confidence level reduces , the critical value reduces, the margin of error reduces and the confidence interval becomes narrower

3 0

3 years ago

The quotient when sarah divided a number by 5 was 247 with a remainder. what is one possible dividend and explain how you find i

kirill [66]

One possible divided is the number 1236.

If 5 went into 1235 the quotient would be exactly 247. However, there needs to be a remainder. So let's just change the number to 1236. Then, there will be a remainder of 1.

6 0

3 years ago

F(x)=lx-2l-4 i need the range of this in interval notation,ASAP LIKE RIGHT THIS SECOND I WILL PUT YOU AS A BRAINLEST<3

kumpel [21]

Answer:

f = l + -2lx-1 + 3x-1

Step-by-step explanation:

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3 years ago

What is the Mean, Median, Mode, and Range for number 3<br><br> Please help

inysia [295]

Answer:

Mean: 49

Median: 41

Mode: 45

Range: 70

Step-by-step explanation:

To find the mean: add up all the numbers, then divide by how many numbers there are.

To find the median:

Arrange your numbers in numerical order.

Count how many numbers you have.

If you have an odd number, divide by 2 and round up to get the position of the median number.

If you have an even number, divide by 2. Go to the number in that position and average it with the number in the next higher position to get the median.

To find the mode: The mode of a data set is the number that occurs most frequently in the set.

To find the range: The range is the difference between the smallest and highest numbers in a list or set. To find the range, first put all the numbers in order. Then subtract (take away) the lowest number from the highest.

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2 years ago

Read 2 more answers

Madison made the following table to record the height of each person in her family.

andrew11 [14]

The answer should be number 4

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3 years ago