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2 years ago

7

Samuel has 20$ in his savings account before he makes a deposit of $160. After 2 weeks, he withdraws $160. How did samuels savin

gs account balance change?

1 answer:

olganol [36]2 years ago

6 0

Since he deposited 160 then took out 160 it did not change

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PLEASE HELP WILL GIVE BRAINLY POINTS!!!!

Afina-wow [57]

Conner played a total of 6 +3 + 6 = 15 games. He won or tied 6+ 3 = 9 games.

His percentage is 9/15 = 0.6 x 100 = 60%

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Her percentage is: 12/16 = 0.75 x 100 = 75%

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Answer:

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Step-by-step explanation:

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2 years ago

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A software company decided to conduct a survey on customer satisfaction. Out of 564 customers who participated in the online sur

nikklg [1K]

Answer:

$z=\frac{0.0904 -0.1}{\sqrt{\frac{0.1(1-0.1)}{564}}}=-0.760 \approx -0.8$

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Step-by-step explanation:

Information given

n=564 represent the sample selected

X=51 represent the number of people who rated the overall services as poor

$\hat p=\frac{51}{564}=0.0904$ estimated proportion of people who rated the overall services as poor

$p_o=0.1$ is the value to compare

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Hypothsis to analyze

We want to analyze if the proportion of customers who would rate the overall car rental services as poor is 0.1, so then the system of hypothesis are:

Null hypothesis: $p=0.1$

Alternative hypothesis: $p \neq 0.1$

The statistic for a one z test for a proportion is given by:

$z=\frac{\hat p -p_o}{\sqrt{\frac{p_o (1-p_o)}{n}}}$ (1)

Replacing the info given we got:

$z=\frac{0.0904 -0.1}{\sqrt{\frac{0.1(1-0.1)}{564}}}=-0.760 \approx -0.8$

And the p value since we have a bilateral test is given b:

$p_v =2*P(z$

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UkoKoshka [18]

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2 years ago

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2 years ago

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