Please guys say me all answer correctly

Use percents to compare attendance at two concerts: 299 people attended the first concert, while 949 attended the second. pls he

Lisa [10]

At the second concert, there were 217% more people than in the first concert.

<h3>What are percentages?</h3>

Percentage can be described as a fraction out of an amount that is usually expressed as a number out of hundred. The sign used to represent percentages is %.

<h3>What is the comparison between the two concerts?</h3>

Number of people who attended the second concert compared to the first concert = (949/299) - 1 x 100 = 217%

To learn more about percentages, please check: brainly.com/question/25764815

8 0

3 years ago

A manufacturer of sprinkler systems designed for fire protection claims that the average activating temperature is at least 135°

nirvana33 [79]

Answer:

$z=\frac{133-135}{\frac{3.3}{\sqrt{32}}}=-3.428$

$p_v =P(z$

If we compare the p value and the significance level given for example $\alpha=0.1$ we see that $p_v$ so we can conclude that we reject the null hypothesis, and the true mean is significantly lower than 135 so the claim not makes sense

Step-by-step explanation:

Data given and notation

$\bar X=133$ represent the sample mean

$\sigma=3.3$ represent the standard deviation for the population

$n=32$ sample size

$\mu_o =135$ represent the value that we want to test

$\alpha$ represent the significance level for the hypothesis test.

z would represent the statistic (variable of interest)

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

State the null and alternative hypotheses.

We need to conduct a hypothesis in order to determine if the true mena is at least 135, the system of hypothesis would be:

Null hypothesis: $\mu \geq 135$

Alternative hypothesis: $\mu < 135$

We know the population deviation, so for this case is better apply a z test to compare the actual mean to the reference value, and the statistic is given by:

$z=\frac{\bar X-\mu_o}{\frac{\sigma}{\sqrt{n}}}$ (1)

z-test: "Is used to compare group means. Is one of the most common tests and is used to determine if the mean is (higher, less or not equal) to an specified value".

Calculate the statistic

We can replace in formula (1) the info given like this:

$z=\frac{133-135}{\frac{3.3}{\sqrt{32}}}=-3.428$

Calculate the P-value

Since is a one-side lower test the p value would be:

$p_v =P(z$

Conclusion

If we compare the p value and the significance level given for example $\alpha=0.1$ we see that $p_v$ so we can conclude that we reject the null hypothesis, and the true mean is significantly lower than 135 so the claim not makes sense

3 0

3 years ago

Convert 18% to a fraction in lowest term

Lemur [1.5K]

Answer:

$\frac{9}{50}$

Step-by-step explanation:

This is the answer because:

1) 185 equals to $\frac{18}{100}$ because 18% is equal to 0.18 which is $\frac{18}{100}$

2) $\frac{18}{100}$ to it's lowest terms is $\frac{9}{50}$

3) It's lowest terms is $\frac{9}{50}$ because 18/2 is 9 and 100/2 is 50

4) $\frac{9}{50}$ can't be simplified any further because 9 and 50 don't have any common factors

Hope this helps! :D

3 0

4 years ago

A box of baseball cards is $25.00 with %15 off. What is the sale price of the box of cards? In other words, how much is it after

yan [13]

Answer:

21.25

Step-by-step explanation:

you would multiply 25 by 0.15 to get the percent being taken off then subtract that from your original price

8 0

3 years ago

Steve, 18 years old, is three times as old as his brother Daniel. How old will Steve be when he will be twice as old as Daniel?

gtnhenbr [62]

18 ÷ 3 is 6, which means that Daniel is 6, and there is a 12 year gap between Steve and Daniel.

12 x 2 is 24, so therefore when Steve is 24, Daniel will be 12, so Steve is twice as old as Daniel:)

4 0

3 years ago

Please guys say me all answer correctly​

Please guys say me all answer correctly