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3 years ago

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WILL RATE IF YOU ANSWER PLEASE HELP Kayla measured a line to be 3.4 inches long. If the actual length of the line is 4.5 inches,

then what was the percent error of the measurement, to the nearest tenth of a percent?

1 answer:

Serggg [28]3 years ago

5 0

Answer:

77.8% is the answer hope it helps. its actually 77.777777778 but its to nearest tenth so round up

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A study was designed to compare the attitudes of two groups of nursing students towards computers. Group 1 had previously taken

trasher [3.6K]

Answer:

Kindly check explanation

Step-by-step explanation:

Given the following :

Group 1:

μ1 = 59.7

s1 = 2.8

n1 = sample size = 12

Group 2:

μ2 = 64.7

s2 = 8.3

n2 = sample size = 15

α = 0.1

Assume normal distribution and equ sample variance

A.)

Null and alternative hypothesis

Null : μ1 = μ2

Alternative : μ1 < μ2

B.)

USing the t test

Test statistic :

t = (m1 - m2) / S(√1/n1 + 1/n2)

S = √(((n1 - 1)s²1 + (n2 - 1)s²2) / (n1 + n2 - 2))

S = √(((12 - 1)2.8^2 + (15 - 1)8.3^2) / (12 + 15 - 2))

S = 6.4829005

t = (59.7 - 64.7) / 6.4829005(√1/12 + 1/15)

t = - 5 / 2.5108165

tstat = −1.991384

Decision rule :

If tstat < - tα, (n1+n2-2) ; reject the Null

tstat < t0.1,25

From t table :

-t0.1, 25 = - 1.3163

tstat = - 1.9913

-1.9913 < - 1.3163 ; Hence reject the Null

5 0

3 years ago

What is the inverse of cube root x/3 +1

Ostrovityanka [42]

Answer:

${f}^{ - 1} (x) = 3 {x}^{2} - 3$

Step-by-step explanation:

We want to find the inverse of

$y = \sqrt[3]{ \frac{x}{3} + 1}$

We interchange x and y to get:

$x= \sqrt[3]{ \frac{y}{3} + 1}$

We solve for y;

${x}^{2} = \frac{y}{3} + 1$

Multiply through by 3

$3 {x}^{2} = y + 3$

Subtract 1 from both sides:

$y = 3 {x}^{2} - 3$

Therefore the inverse is

${f}^{ - 1} (x) = 3 {x}^{2} - 3$

8 0

3 years ago

Simplify x^2 - 9/x^2 - 3x

Bezzdna [24]

X+3/x or 1/x^8(x-3). if “2-9 & 2-3x” are exponents then the 2nd anwser is the anwser if not then the first.

5 0

2 years ago

HELP ME HELP ME PLEASE

Y_Kistochka [10]

What is that supposed to mean

3 0

3 years ago

Read 2 more answers

License plates in a particular state display 3 letters followed by 3 numbers. How many different license plates can be manufactu

netineya [11]

Using the fundamental counting theorem, it is found that 17,576,000 different license plates can be manufactured.

Fundamental counting theorem:

States that if there are n things, each with $n_1, n_2, \cdots, n_n$ ways to be done, each thing independent of the other, the number of ways they can be done is:

$N = n_1 \times n_2 \times \cdots \times n_n$

In this problem:

Since repetition is allowed, for the 3 letters, there are 26 outcomes, hence $n_1 = n_2 = n_3 = 26$ .

For the 3 numbers, there are 10 outcomes, hence $n_4 = n_5 = n_6 = 10$

Then:

$N = 26^3 \times 10^3 = 17576000$

17,576,000 different license plates can be manufactured.

To learn more about the fundamental counting theorem, you can take a look at brainly.com/question/24314866

5 0

2 years ago