A random sample of 100 undergraduate students at a university found that 78 of them had used the university library’s website to find resources for a class. What is the margin of error for the true proportion of all undergraduates who had used the library’s website to find resources for a class?

Answers

Answer 1

Answer: From the given values, it seems as if the missing key to value here is not the margin of error, but instead, the standard error. The formula for standard error is as follows:

SE = sqrt ( x(n-x)/n^3 )

Substituting the given values:

SE = sqrt ( 78(100-78)/100^3)) = 0.04

Answer 2

Answer:

the answer is A on plato

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Determine if the following tables from a lineAr equation if so identify the slope otherwise write non linear

Answers

2)
a*2 + b = 26;
a*(-4) + b = -16;
then, a*6 = 42 => a = 7 => b = 26 -14 => b = 12;

from table, 7*9 + 12 = 63 + 12 = 75, correct;
7*(-8) + 12 = -56 + 12 = -44, correct;

slope = ( -44 + 16) / ( -8 + 4) = ( - 28) / (-4) = 7 = a;

I don't get it , can someone help me

Answers

The problem is asking for the surface area of a cylinder.
The formula for surface area of a cylinder is A = 2πrh+2πr²
radius = 1.5
height = 4

A = 2π(1.5)(4)+2π(1.5)²
A ≈ 51.84 in²

Write each mixed number as m/n in simplest form where m/n are integers 7 7/9

Answers

70/9

7 is equivalent 63/9, and then you add 63 and 7 to get 70/9

Wendy is paid $12 per hour and plans to work between 30 and 35 hours per week.identify the independent and dependent quantity in the situation find the reasonable domain and range

Answers

The dependent quantity would be the $12 per hour, while the independent quantities are 30 hrs/ week to 35 hours/ week.

The $12 per hour would become $360/week to $420/week.

The domain of the problem, with the unit of hrs/week, would be :30,31,32,33,34,35.
The Range of the problem, with the unit of $/week, would be : 360, 372, 384, 396, 408, 420.

Answer:

B. hours worked; weekly pay; 30 to 35 hours; $360 to $420

C. weekly pay; hours worked; 30 to 35 hours; $360 to $420

Step-by-step explanation:

Ellen Saver went to her bank. She had a balance of $2,447.67 in her savings account. She withdrew $231.49 and the teller credited her account with $36.61. What is her new balance?

Answers

Answer:

$2,252.79

Step-by-step explanation:

To answer the question, we use the formula to calculate the balance:

Balance = initial balance - withdrawal + credited amount

Initial balance = $2,447.67

Withdrawal = $231.49

Credited amount = $33.61

Substituting the variables for their values, we have

Balance = $2,447.67 - $231.49 + $33.61

Balance = $2,252.79

In conclusion, Ellen's new balance in her bank account is $2,252.79

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I hope this helps!

$2,447.67 - $231.49 = $2,216.18

$2,216.18 + $36.61 = $2,252.79

her new balance is $2,252.79

Find the slope of the line passing through the points (5, 4) and (5, -5)

Answers

Answer:

NO Slope

Step-by-step explanation:

slope of the line passing through the points (5, 4) and (5, -5)

slope = y2 - y1 = -5 - 4 = -9

x2 - x1 5 - 5 0

see attached.

in this graph of a line x = 5, no matter what the value of y is.

the horizontal change is 0 and the vertical change is any y value

therefore, there is NO Slope

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