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trasher [3.6K]
2 years ago
9

HELPPPPPPPPPPPP MEEEEEEE

Mathematics
1 answer:
garik1379 [7]2 years ago
3 0
250-75+ 175 the swim club can reserve 175 rooms
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Draw the straight line y= 2-x
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Answer:

Step-by-step explanation:

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2 years ago
Read 2 more answers
In 1945. an organization surveyed 1100 adults and asked. "Are you a total abstainer from, or do you on occasion consume, alcohol
oee [108]

Answer:

n_1 p_1 =1100*0.31=341 \geq 10

n_1 (1- p_1) =1100*(1-0.31)=759 \geq 10

n_2 p_2 =1100*0.33=363 \geq 10

n_2(1- p_2) =1100*(1-0.33)=737 \geq 10

The data come from a population that is normally distributed.

The samples are independent

z=\frac{0.31-0.33}{\sqrt{0.32(1-0.32)(\frac{1}{1100}+\frac{1}{1100})}}=-0.47  

Since is a two sided test the p value would be:  

p_v =2*P(Z  

If the population proportions are equal one would expect a sample difference proportion greater than the absolute value of the 64 observed in about out of 100 repetitions of this experiment.

Step-by-step explanation:

1) Data given and notation  

X_{1}=341 represent the number of  people indicated that they were total abstainers In a recent survey

X_{2}=363 represent the number of people indicated that they were total abstainers In a 1945 survey,

n_{1}=1100 sample 1

n_{2}=1100 sample2

p_{1}=\frac{341}{1100}=0.31 represent the proportion of people indicated that they were total abstainers In a recent survey

p_{2}=\frac{363}{1100}=0.33 represent the proportion of people indicated that they were total abstainers In a 1945 survey,

z would represent the statistic (variable of interest)  

p_v represent the value for the test (variable of interest)  

\alpha=0.05 significance level given

n_1 p_1 =1100*0.31=341 \geq 10

n_1 (1- p_1) =1100*(1-0.31)=759 \geq 10

n_2 p_2 =1100*0.33=363 \geq 10

n_2(1- p_2) =1100*(1-0.33)=737 \geq 10

The data come from a population that is normally distributed.

The samples are independent

2) Concepts and formulas to use  

We need to conduct a hypothesis in order to check if is there is a difference in the two proportions of interest, the system of hypothesis would be:  

Null hypothesis:p_{1} - p_{2}=0  

Alternative hypothesis:p_{1} - p_{2} \neq 0  

We need to apply a z test to compare proportions, and the statistic is given by:  

z=\frac{p_{1}-p_{2}}{\sqrt{\hat p (1-\hat p)(\frac{1}{n_{1}}+\frac{1}{n_{2}})}}   (1)  

Where \hat p=\frac{X_{1}+X_{2}}{n_{1}+n_{2}}=\frac{361+343}1100+1100}=0.32  

z-test: Is used to compare group means. Is one of the most common tests and is used to determine whether the means of two groups are equal to each other.  

Calculate the statistic  

Replacing in formula (1) the values obtained we got this:  

z=\frac{0.31-0.33}{\sqrt{0.32(1-0.32)(\frac{1}{1100}+\frac{1}{1100})}}=-0.469    

Statistical decision

Since is a two sided test the p value would be:  

p_v =2*P(Z  

Comparing the p value with the significance level given \alpha=0.1 we see that p_v>\alpha so we can conclude that we have enough evidence to FAIL to reject the null hypothesis, and we can't say that we have a significant differences between the two proportions.  

If the population proportions are equal one would expect a sample difference proportion greater than the absolute value of the 64 observed in about out of 100 repetitions of this experiment.

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2 years ago
Amanda is making pillows for her sofa, The fabric that she likes costs $45 per yard. Amanda waits until
malfutka [58]

Answer:

15$

Step-by-step explanation:

4 0
3 years ago
3) There are 16 cups in a gallon. The equation c=16g gives the number of cups in terms of the number of gallons. Write another e
suter [353]

We know the equation

c=16g

gives the number of cups if we know the numbe rog gallons.

If we want an equation that gives the number of gallons if we know the number of cups we just have to solve hte equation for g, that is:

g=\frac{c}{16}

Therefore, the equation we are looking for is:

g=\frac{c}{16}

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10 months ago
Need help on these questions ASAP DUE TOMORROW PLEASE
Shkiper50 [21]

9514 1404 393

Answer:

  3)  D

  4)  D

  5)  B

  6)  B

Step-by-step explanation:

3) A "Pythagorean triple" is a set of 3 integers that could be the sides of a right triangle. The only triangle shown with integer side lengths is choice D.

__

5) The only triangle for which the square of the hypotenuse is the sum of the squares of the other two sides is choice D.

  11² +2² = (5√5)²

  121 + 4 = 125

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6) The lengths of sides of each right triangle are 2/3 of those of choice D in problem 4. That is, they are a 7-24-25 triangle, multiplied by 2. That means the height is 24·2 = 48, and the area is ...

  A = 1/2bh

  A = 1/2(28 m)(48 m) = 672 m² . . . . matches choice B

__

7) The side lengths of a 30-60-90 triangle have the ratios 1 : √3 : 2. That is, the short leg is half the hypotenuse, a fact stated in A and D. Those true statements make it clear that statement B is false.

3 0
2 years ago
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