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Lisa [10]
2 years ago
6

You flip the same coin 900 mores times (1000 total flips). If half of the 900 additional flips are heads and half are tails, wha

t is the empirical probability of getting a heads for this coin? (505 heads in 1000 flips)
Mathematics
1 answer:
aev [14]2 years ago
5 0

Answer:

CAn i have help and i will help you

Step-by-step explanation:

What does negative 2 over 3 > −1 indicate about the positions of negative 2 over 3 and −1 on the number line?

negative 2 over 3 is located to the right of −1

negative 2 over 3 is located on the left of −1

negative 2 over 3 is located on the right of 0, and −1 is located on the left of 0

negative 2 over 3 is located on the left of 0, and −1 is located on the right of 0

Question 2(Multiple Choice Worth 4 points)

(03.05)

Which set of rational numbers is arranged from least to greatest?

1 over 5, −1.4, negative 1 over 2, 3

3, negative 1 over 2, −1.4, 1 over 5

3, 1 over 5, −1.4, negative 1 over 2

−1.4, negative 1 over 2, 1 over 5, 3

Question 3(Multiple Choice Worth 4 points)

(03.05)

Based on the graph, which inequality is correct for a number that is to the right of -4?

A number line is shown from negative 8 to 8 at increments of 1. A circle is shown at negative 4. The entire portion of the number line to the right of negative 4 is shaded.

2 < −4

−4 > −3

1 < −4

2 > −4

Question 4(Multiple Choice Worth 4 points)

(03.05)

A girl's feet are negative 2 over 4 yards from the surface of a pool. A boy's feet are negative 3 over 4 yards from the surface of the pool. Determine whose feet are closer to the surface.

The girl's feet are closer to the surface of the pool because negative 2 over 4 > negative 3 over 4.

The boy's feet are closer to the surface of the pool because negative 2 over 4 > negative 3 over 4.

The girl's feet are closer to the surface of the pool because negative 2 over 4 < negative 3 over 4.

The boy's feet are closer to the surface of the pool because negative 2 over 4 < negative 3 over 4.

Question 5(Multiple Choice Worth 4 points)

(03.05)

Which inequality best represents that ice cream at −2°C is cooler than ice cream at 4°C?

−2°C < 4°C

−2°C > 4°C

−4°C > 2°C

−4°C < −2°C

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C = 2 x pi x r

divide each side by 2 x pie to get r by itself.

45/(2(3.14)) = r

r = 7.17

4 0
3 years ago
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While her husband spent 2½ hours picking out new speakers, a statistician decided to determine whether the percent of men who en
AVprozaik [17]

Answer:

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

z=\frac{0.34848-0.34782}{\sqrt{0.34831(1-0.34831)(\frac{1}{66}+\frac{1}{23})}}=0.0057  

p_v =P(Z>0.0057)=0.4977  

The p value is a very high value and using the significance level \alpha=0.05 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 say the the percent of men who enjoy shopping for electronic equipment is NOT significantly higher than the percent of women who enjoy shopping for electronic equipment.  

Step-by-step explanation:

1) Data given and notation  

X_{M}=23 represent the number of men that said they enjoyed the activity of Saturday afternoon shopping

X_{W}=8 represent the number of women that said they enjoyed the activity of Saturday afternoon shopping

n_{M}=66 sample of male selected

n_{W}=23 sample of demale selected

p_{M}=\frac{23}{66}=0.34848 represent the proportion of men that said they enjoyed the activity of Saturday afternoon shopping

p_{W}=\frac{8}{23}=0.34782 represent the proportion of women with red/green color blindness  

z would represent the statistic (variable of interest)  

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

2) Concepts and formulas to use  

We need to conduct a hypothesis in order to check if the percent of men who enjoy shopping for electronic equipment is higher than the percent of women who enjoy shopping for electronic equipment , the system of hypothesis would be:  

Null hypothesis:p_{M} \leq p_{W}  

Alternative hypothesis:p_{M} > p_{W}  

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

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

Where \hat p=\frac{X_{M}+X_{W}}{n_{M}+n_{W}}=\frac{23+8}{66+23}=0.34831

3) Calculate the statistic

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

z=\frac{0.34848-0.34782}{\sqrt{0.34831(1-0.34831)(\frac{1}{66}+\frac{1}{23})}}=0.0057  

4) Statistical decision

Using the significance level provided \alpha=0.05, the next step would be calculate the p value for this test.  

Since is a one side right tail test the p value would be:  

p_v =P(Z>0.0057)=0.4977  

So the p value is a very high value and using the significance level \alpha=0.05 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 say the the percent of men who enjoy shopping for electronic equipment is NOT significantly higher than the percent of women who enjoy shopping for electronic equipment.  

4 0
3 years ago
Regina recently inherited an oil painting that was purchased by her great-grandfather for $100 in 1938. In 2013 she took the pai
muminat
The future worth of a certain item or money deposited at a certain percentage is obtained by the equation,

   F = P x (1 + i)^n

F is the future worth, P is present worth, i is the percentage, and n is the number of years.

   n = 2013 - 1938
   n = 75

Substituting the known values,

    300,000 = 100 x (1 + i)^75

The value of i from the equation is 0.1126.

The answer to this item is 11.26%. 
6 0
3 years ago
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suppose the leftmost digits of two numbers are eight and three can you tell which number is greater explain
tekilochka [14]
No because you don't know how many places are in the number
ex:843 and 3257
there are 4 places in 3257 and only 3 places in 843
3 0
3 years ago
A bacteria colony increases in size at a rate of 4.0581e1.6t bacteria per hour. If the initial population is 36 bacteria, find t
Harrizon [31]

Answer:

1560

Step-by-step explanation:

The rate of Increase of the population (P) of the bacteria is given as:

\frac{dP}{dt} =4.058e^{1.6t}

dP =4.058e^{1.6t}}dt\\Taking\: Integrals\\\int dP =4.058 \int e^{1.6t}dt\\P(t)=\frac{4.058}{1.6} (e^{1.6t} +K)\\P(t)=2.53625 (e^{1.6t} +K)

Where k is a constant of Integration.

At t=0, P(t)=36

36=2.53625 (e^{1.6*0} +K)\\36=2.53625 (e^{0} +K)\\36=2.53625 (1 +K)\\36=2.53625 +2.53625K\\K=13.19

Therefore:

P(t)=2.53625 (e^{1.6t} +13.19)\\At \: t=4\\P(4)=2.53625 (e^{1.6*4} +13.19)\\=1559.88\\P(4)=1560

3 0
3 years ago
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