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3 years ago

Question ?????????????

Mathematics

2 answers:

aniked [119]3 years ago

5 0

17.45 +2.00= 19.45 cost without coupon
19.45-5.95=13.50 subtract for snacks
13.50/2= $6.75 divide by 2
$6.75 for each

klio [65]3 years ago

5 0

Answer:

The answer is $4.75 for one admission cost

Step-by-step explanation:

it was 17.45 for 2 peoples admission

17.45-2.00= 15.45

15.45-5.95=9.50

9.50/2= $4.75

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Suppose Brianna decided that the error margin of her 95% confidence interval was too large and wanted an error margin of .05 whi

svetoff [14.1K]

Answer:

$n=\frac{0.26 (1-0.26)}{(\frac{0.05}{1.96})^2} =295.65 \approx =296$ (b)

Rounded up would be n =296

Step-by-step explanation:

Assuming this previous info: She randomly interested in the p selects 100 engineering majors, and 26 of them said they earned an A in Calc 1.

Previous concepts

A confidence interval is "a range of values that’s likely to include a population value with a certain degree of confidence. It is often expressed a % whereby a population means lies between an upper and lower interval".

The margin of error is the range of values below and above the sample statistic in a confidence interval.

Normal distribution, is a "probability distribution that is symmetric about the mean, showing that data near the mean are more frequent in occurrence than data far from the mean".

Solution to the problem

The population proportion have the following distribution

$p \sim N(p,\sqrt{\frac{\hat p(1-\hat p)}{n}})$

The margin of error for the proportion interval is given by this formula:

$ME=z_{\alpha/2}\sqrt{\frac{\hat p (1-\hat p)}{n}}$ (a)

If solve n from equation (a) we got:

$n=\frac{\hat p (1-\hat p)}{(\frac{ME}{z})^2}$ (b)

In order to find the critical value we need to take in count that we are finding the interval for a proportion, so on this case we need to use the z distribution. Since our interval is at 95% of confidence, our significance level would be given by $\alpha=1-0.95=0.05$ and $\alpha/2 =0.025$ . And the critical value would be given by:

$z_{\alpha/2}=\pm 1.96$

Thes estimated proportion is $\hat p = \frac{26}{100}=0.26$

And replacing we got:

$n=\frac{0.26 (1-0.26)}{(\frac{0.05}{1.96})^2} =295.65 \approx =296$ (b)

3 0

3 years ago

In a jar there are 3 yellow candies, 3 blue candies, and 2 orange candies. What percent of the jar is filled with orange candies

Nastasia [14]

Answer: 25 percent of the jar is filled with orange candies

Step-by-step explanation:

In the jar, there are 3 yellow candies, 3 blue candies, and 2 orange candies. This means that the total number of candies inside the jar would be the sum of the yellow, blue and orange candies. It becomes

3 + 3 + 2 = 8 candies.

The percent of the jar filled with orange candies would be expressed as

number of orange candies/total number of candies × 100

It becomes

2/8 × 100 = 25%

4 0

3 years ago

Which of the following methods would be the easiest to use to solve x2 + 5x – 6 = 0?

EastWind [94]

For me personally, the easiest way to do this is by isolating the x² term, and finding the square root of both sides. The hardest way (well actually, the longest way) would be to use the quadratic formula. It just complicates things unnecessarily.

5 0

3 years ago

.......What is 7/8 of 96?

Ray Of Light [21]

Answer: 84

Step-by-step explanation: (7/8)×96

3 0

4 years ago

I am confused on how to do this? please help!

IceJOKER [234]

You would take random numbers preferable smaller ones such as -1,0,1,2
You would put those in the place of x
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6 0

3 years ago