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3 years ago

7

I'm so confused. Really need help! Brainliest + points

1 answer:

Lera25 [3.4K]3 years ago

8 0

What do u need help with? And what are you confused about I’m here to help let me k ow what you need help with so I can see if I can help or not.

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A trail mix contains peanuts raisins and m&ms in the mix the amount of peanuts is three times the amount of m&ms;and the

Nesterboy [21]

Answer:

6m

Step-by-step explanation:

m =number of M&M's

3m=number of peanuts

2m=number of raisins

m+3m+2m=total number of pieces of food=6m

5 0

4 years ago

A school had 1,200 students last year and only 1,080 students this year. What was the percentage decrease in the number of stude

jeyben [28]

Answer: 10%

First off, you need to divide 1200 with 1080.

1200 - 1080 = 120.

Next, divide 120 with the original number.

120 / 1200 = 0.1

Then, multiply 0.1 with 100.

100 x 0.1 = 10

Finally, add a % at the end.

10 -> 10%

So in summary, your answer is 10%

8 0

3 years ago

Researchers wondered if there was a difference between males and females in regard to some common annoyances. They asked a rando

inysia [295]

Answer:

a)

The proportions of the females and males who took the survey who are annoyed by the behavior in question are<u> 0.3301 </u>and_<u>0.3791 </u>respectively

b)

<em>D) The data come from a Population that is Normally distributed</em>

<em>F) the samples are independent</em>

<em>c) </em>

<em>Null hypothesis: H₀: </em> $p_{m} ^{-} - p^{-} _{fm} \leq 0$

<em>Alternative Hypothesis H₁</em>: $p_{m} ^{-} - p^{-} _{fm} \geq 0$

Step-by-step explanation:

Given data Among the 530 males surveyed, 175 responded "Yes

The sample proportion of males

$p_{m} ^{-} = \frac{x}{n} = \frac{175}{530} = 0.3301$

The sample proportion of 575 Females surveyed, 218 responded "Yes

$p_{fem} ^{-} = \frac{x}{n} = \frac{218}{575} = 0.3791$

a)

The proportions of the females and males who took the survey who are annoyed by the behavior in question are<u> 0.3301 </u>and_<u>0.3791 </u>respectively

b)

<em>The data come from a Population that is normally distributed.</em>

<em>The two samples are independent</em>

c)

<em>Null hypothesis: H₀: </em> $p_{m} ^{-} - p^{-} _{fm} \geq 0$

<em>Alternative Hypothesis H₁</em>: $p_{m} ^{-} - p^{-} _{fm} \leq 0$

We will use two samples Z - hypothesis test

$Z = \frac{p^{-} _{m} - p^{-} _{fem} }{se(p^{-} _{m}-p^{-} _{fem} ) }$

$Se(p_{m} -p_{fem}) = \sqrt{\frac{p_{m}(1-p_{m}) }{n_{m} }+\frac{p_{fem} (1-p_{fem} )}{n_{fem} } }$

$Se(p_{m} -p_{fem}) = \sqrt{\frac{0.3301(1-0.3301) }{530 }+\frac{0.3791(1-0.3791)}{575} }$

$Se(p_{m} ^{-} - p^{-} _{fem} ) = \sqrt{0.000826} = 0.0287$

The test statistic

$Z = \frac{0.3301-0.3791}{0.02875}$

Z = -1.7043

|Z| = |-1.7043|

The tabulated value Z₀.₉₅ = 1.96

The calculated Z= 1.7043 < 1.96 at 0.05 level of significance

The null hypothesis is accepted

<u><em>Conclusion:-</em></u>

The evidence suggest not a higher proportion of females are annoyed by this behavior

4 0

3 years ago

One day, while going to her office, Suchitra has to go to her son's school to attend PTM. Then she worked

professor190 [17]

10000/3355532 that might be it

3 0

3 years ago

Three men build a wall in 10 days. How long will it take five men

Slav-nsk [51]

Answer:

Step-by-step explanation:

By proportion it takes

3/5 * 10

= 6 days.

6 0

3 years ago