I need the answer really soon!!!!!

g A report on the nightly news broadcast stated that 10 out of 108 households with pet dogs were burglarized and 20 out of 208 w

Naya [18.7K]

Answer:

Test statistic |Z| = 0.1040 < 1.96 at 0.05 level of significance

Step-by-step explanation:

Step(i):-

Given that a report on the nightly news broadcast stated that 10 out of 108 households with pet dogs were burglarized

First proportion

$p_{1} = \frac{x_{1} }{n_{1} } = \frac{10}{108} = 0.0925$

Given that a report on the nightly news broadcast stated that 20 out of 208 households without pet dogs were burglarized

Second proportion

$p_{2} = \frac{x_{2} }{n_{2} } = \frac{20}{208} = 0.0961$

where

$P = \frac{n_{1}p_{1} +n_{2}p_{2} }{n_{1} +n_{2} }$

P = 0.09486

Q = 1 - P = 1 - 0.09486 = 0.90514

Step(ii):-

Test statistic

$Z = \frac{p_{1}-p_{2} }{\sqrt{PQ(\frac{1}{n_{1} } +\frac{1}{n_{2} } )} }$

$Z = \frac{0.0925-0.0961 }{\sqrt{0.09486 X 0.90514(\frac{1}{108 } +\frac{1}{208 } )} }$

Z = -0.1040

|Z| = |-0.1040|

|Z| = 0.1040

Critical value Z = 1.96 at 0.05 level of significance

6 0

3 years ago

If loss is loss percent and cost price in CP what will be SP?

andreev551 [17]

Answer:

SP = selling price

SP = [(100 + Gain%) / 100] * CP.

SP = [(100 – Loss %) / 100]*CP.

3 0

3 years ago

Read 2 more answers

An engineering student answered 81 questons correctly ona 90 question test. What percent of the question did she answer correctl

SIZIF [17.4K]

Answer:

correct answer = 90%

Step-by-step explanation:

Let x be the percent of the question did she answer correctly.

Given:

An engineering student answered 81 questions correctly on a 90 question test.

Find the percent of the question did she answer correctly.

Solution:

Percentage formula is given below

% answer $=\frac{correct\ answer}{total\ questions}\times 100$

% answer $=\frac{81}{90}\times 100$

% answer $=\frac{81\times 100}{90}$

% answer $=\frac{81\times 10}{9}$

% answer $=9\times 10$

% answer $=90$

correct answer = 90%

Therefore, she answered 90% correctly.

4 0

3 years ago

Move 2 matches to get biggest number from 508

Lilit [14]

Well, i think you just need to move the 2 matches on the top and the bottom of the number 0 and put it after the number 8

This way, you will change the number from

5 0 8

into

5 1 1 8 1 1

hope this helps

3 0

3 years ago

What is 3.754×10^5 than round it to the tenth

saul85 [17]

Answer:

375,400

Step-by-step explanation:

3.754*10^5
10^5=100,000
3.754*100,000
375,400

YaYYYY u got it! =)

5 0

3 years ago

Read 2 more answers