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2 years ago

Help Please it's urgent!!!

Mathematics

2 answers:

DedPeter [7]2 years ago

8 0

Answer: I believe it's C sorry if I'm wrong.

Step-by-step explanation:

Fiesta28 [93]2 years ago

7 0

Can’t see question . Maybe crop it more up

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Mark is 15 years younger than Ashley. The sum of their ages is 55. Write a set of equations to determine Mark (M) age and Ashley

shusha [124]

A+M=55
A-15=55
is the correct equations.

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The price of sugar has increased from ₹32 per kg to ₹40 per kg. The percentage increase in the price of sugar is?

densk [106]

Answer:

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2 years ago

Read 2 more answers

Rosetta wants to estimate the percentage of people who rent their home. She surveys 250 individuals and finds that 48 rent their

Andreas93 [3]

Answer:

$0.192 - 1.645\sqrt{\frac{0.192(1-0.192)}{250}}=0.151$

$0.192 + 1.645\sqrt{\frac{0.192(1-0.192)}{250}}=0.233$

Step-by-step explanation:

Information given

$X= 48$ number of people who rent their home

$n= 250$ represent the sample size

$\hat p =\frac{48}{250}= 0.192$ represent the proportion of people who rent their home

In order to find the critical value we need to take in count that we are finding the interval for a proportion, so on this case we need to use the z distribution. Since our interval is at 90% of confidence, our significance level would be given by $\alpha=1-0.90=0.1$ and $\alpha/2 =0.05$ . And the critical value would be given by:

$z_{\alpha/2}=\pm 1.645$

The confidence interval for the mean is given by the following formula:

$\hat p \pm z_{\alpha/2}\sqrt{\frac{\hat p (1-\hat p)}{n}}$

If we replace the values obtained we got:

$0.192 - 1.645\sqrt{\frac{0.192(1-0.192)}{250}}=0.151$

$0.192 + 1.645\sqrt{\frac{0.192(1-0.192)}{250}}=0.233$

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3 years ago