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3 years ago

Could someone help me bc idkk how this works

Mathematics

1 answer:

dmitriy555 [2]3 years ago

5 0

Answer:

the answer is 2.

Step-by-step explanation:

This is because the interest rate is if he had $1 in the account for a year you would add the 18% or in decimel form 0.0018 do that to the 15th to get 15 years and multiply that by 5000 because that was the ammount of money he put in so 5000(1*0.0018)15 or 0.0018^15*5000

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A group of researchers wants to know whether men are more likely than women to contract a novel coronavirus. They surveyed two r

olasank [31]

Answer:

Test statistic Z= 0.13008 < 1.96 at 0.10 level of significance

null hypothesis is accepted

There is no difference proportion of positive tests among men is different from the proportion of positive tests among women

Step-by-step explanation:

Step(I):-

Given surveyed two random samples of 390 men and 360 women who were tested

first sample proportion

$p_{1} = \frac{360}{390} = 0.9230$

second sample proportion

$p_{2} = \frac{47}{52} = 0.9038$

Step(ii):-

Null hypothesis : H₀ : There is no difference proportion of positive tests among men is different from the proportion of positive tests among women

Alternative Hypothesis:-

There is difference between proportion of positive tests among men is different from the proportion of positive tests among women

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

where

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

P = 0.920

$Z= \frac{0.9230-0.9038}{\sqrt{0.920 X0.08(\frac{1}{390}+\frac{1}{52} } )}$

Test statistic Z = 0.13008

Level of significance = 0.10

The critical value Z₀.₁₀ = 1.645

Test statistic Z=0.13008 < 1.645 at 0.1 level of significance

Null hypothesis is accepted

There is no difference proportion of positive tests among men is different from the proportion of positive tests among women

7 0

3 years ago

Easy question easy points yall :p

yarga [219]

Answer:

+or- 8

Step-by-step explanation:

take the square root of 64

8 0

3 years ago

Read 2 more answers

In a goodness-of-fit test, the null hypothesis states that the data came from a normally distributed population. The researcher

marta [7]

Answer:

Solution: C) 7.815

Hint: From Chi-square table with (k-r-1)=(6-2-1) = 3 d.f the critical value = 7.8147

8 0

3 years ago

These triangles are similar. find Y and X

CaHeK987 [17]

It these triangles are similar, then the sides of the triangles are in proportion:

$\dfrac{y}{10}=\dfrac{y+4}{15}$ cross multiply

$15y=10(y+4)$ use distributive property

$15y=10y+40$ subtract 10y from both sides

$5y=40$ divide both sides by 5

$\boxed{y=8}$

$\dfrac{x}{4}=\dfrac{6}{8}$ cross multiply

$8x=(4)(6)$

$8x=24$ divide both sides by 8

$\boxed{x=3}$

3 0

3 years ago

What is the area of the square below?

Irina18 [472]

Answer: The answer is 81

Step-by-step explanation:

because 9x9=81 so u don't multiply the whole square like this

9x9x9x9=36 thats wrong and that was my mistake but yeah it would be 81.

8 0

3 years ago