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pshichka [43]
3 years ago
6

A teacher wants to compare the mean geology scores of two different classes. She is testing the null hypothesis that there is no

difference in the population mean scores of the two classes. The difference of the sample means is 51.4. If the standard deviation of the distribution of the difference of sample means is 16.66, what is the 95% confidence interval for the population mean difference? A)between -33.2 and + 33.2 B)between -49.9 and +49.9 C)between -102.8 and +102.8 D)between -154.2 and +154.2
Mathematics
1 answer:
xxMikexx [17]3 years ago
6 0
<span>The 95% confidence interval is equal to two standard deviations either side of the mean, so in this case, the answer would be +/-(2 * 16.6) from the mean, or -33.2 and +33.2 points from the sample mean. This would give a response of A.</span>
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BabaBlast [244]
A) .10
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5 0
3 years ago
I need some DETAILED examples of Dividing Integers! Urgent, pls help ASAP!
vfiekz [6]

Here are some examples:

Integers are positive and negative numbers, but dividing integers are dividing positive and negative numbers:

Remember these rules:

  1. Negative divided by a negative equals a positive.
  2. Negative divided by a positive equals a negative.
  3. Positive divided by a positive equals a positive .

Examples:

  • -4 \div 2 = -2
  • -4 \div -4 = 1
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Hope this helps!

8 0
3 years ago
Given the following functions f(x) and g(x), solve f over g (−5) and select the correct answer below: f(x) = 2x − 20 g(x) = x −
Irina-Kira [14]
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3 0
4 years ago
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6 • 14 - (9 + 8) 2 =
Nataly [62]

Answer:

50

Step-by-step explanation:

For this question you would follow the BIDMAS rule - (Brackets, Indices, Division, Multiplication, Addition, Subtraction.)

The first thing in this question you need to solve it (9 + 8)

we do this because, when we follow BIDMAS, the first rule is brackets

so, 9 + 8 = 17

The second step is to multiply, as this rule is second,

so, 17 x 2 = 34

Our final step is to solve the last bit, which is 6 x 14

and we know that 6 x 14 = 84

So now that we have 84 and 34, we need to subtract the two numbers as shown,

84 - 34 = 50

And this is how you get the answer 50

i hope this has helped you, please comment if you did not understand it and i will explain it in another way : )

4 0
4 years ago
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Evaluate f(x) = –x2 + 1 for x = –3. –9 4 –4 –8
Klio2033 [76]

Answer:

-63

Step-by-step explanation:

Write the problem as a mathematical expression.

f(x)=-x^2+1  for x =3-9 4-4-8

Simplify  4−4−8  to substitute in f(x)=−x^2+1

Subtract  4  from 4

0-8

Subtract  8  from 0

-8

Replace the variable  x  with  −

8  in the expression

f(-8)=-(-8)^2+1

Simplify

f(-8)=-64+1

f(-8)=-63

Answer = -63

Plz give me Brainliest if you can, hope this helps.

5 0
3 years ago
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