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3 years ago

MATH TUTORING ISNT WORKING HELP

Mathematics

1 answer:

SpyIntel [72]3 years ago

4 0

Answer:

no you are wrong

Step-by-step explanation:

Hope it will help

please mark as a brainlists

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Find the population variance and standard deviation. 8â€‹, 17â€‹, 29â€‹, 35â€‹, 41 Choose the correct answer below. Fill in the

Nuetrik [128]

Answer:

(a) σ² = 144

(b) s² = 12

Step-by-step explanation:

(a) Population variance σ² = ∑(X - $\overline{X}$ )² / N

The arithmetic mean $\overline{X} = \frac{8 + 17 + 29 + 35 + 41}{5}$

$\overline{X} = \frac{130}{5}$

$\overline{X} = 26$

σ² = $\frac{(8 - 26)^{2} + (17 - 26)^{2} + (29 - 26)^{2} + (35 - 26)^{2} + (41 - 26)^{2}}{5}$

= $\frac{(- 18)^{2} + (- 9)^{2} + (3)^{2} + (9)^{2} + (15)^{2}}{5}$

= $\frac{324\ +\ 81\ +\ 9\ +\ 81\ +\ 225}{5}$

= $\frac{720}{4}$

σ² = 144

(b) $Standard\ deviation = \sqrt{Variance}$

$= \sqrt{144}$

= 12

7 0

3 years ago

An experiment was done to look at the positive arousing effects of imagery on different people. A sample of statistics lecturers

statuscvo [17]

Answer:

The Three way mixed ANOVA

Step-by-step explanation:

The Three factor repeated measures ANOVA analysis otherwise referred to as the Three way mixed ANOVA should be used for the analysis.

This is because we are comparing three independent variables in the context.

• People type (statistic lectures and students)

• Imagery type (positive, neutral and negative imagery)

• Repeated measure: Before and After images shown

• Measuring the dependent variable positive arousal as shown in the table attached to the answer.

After going through the table attached you will see that there should be performed a three factor repeated measures ANOVA analysis.

5 0

3 years ago

What is the percent of 225 is 45

kvv77 [185]

Rewrite the question, as follows:

45 is what percent of 225?

Form the ratio 45/225, and then multiply the result by 100%:

0.20(100%) = 20% (answer)

4 0

3 years ago

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a car show is selling tickets to rise money. adult tickets sell for $5.00 and children under 12 cost $2.00. you need to raise mo

OlgaM077 [116]

Let c = number of children
Let a = number of adults

5a + 2c > 3350

3 0

3 years ago

You are choosing between two different cell phone plans. The first plan charges a rate of 24 cents per minute. The second plan c

Virty [35]

Answer: 286 minutes

Step-by-step explanation:

x : # of months that has gone by

0.24x : cost of the 24 cent plan after "x" minutes

39.95 + 0.10x : cost of the 10 cent plan after "x" minutes

1. 39.95 + 0.10x > 0.24x

2. 39.95 > 0.24x - 0.10x

3. 39.95 > 0.14x

4. 285.36 > x

x must be AT LEAST 286 minutes for plan #2 (39.95 + 0.10x) to be a better deal

7 0

3 years ago

Read 2 more answers