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3 years ago

Can somebody help me please!

Mathematics

1 answer:

maxonik [38]3 years ago

8 0

Answer:with what?

Step-by-step explanation:they asked for help

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Round to the nearest cent $73,028.85316

polet [3.4K]

Answer:

73,028.8520

pretty sure that’s what you’re asking?

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4 years ago

A pakage of 5 pairs of inclated gloves cost $29.45 what is the unit costof the pairs of gloves

castortr0y [4]

I'm not entirely sure of your question, but I'll try to answer haha. If you're asking what the unit would be for a pair of gloves, it would still be in dollars. If you're asking how much one pair of gloves costs, you would divide the total number (29.45) by the number of items you have (5 pairs). Your answer is $5.89 for a pair of gloves. Hope this helps, but sorry if it doesn't!

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3 years ago

A tree grows three feet per year. What happens to the growth of the tree when the number of years changes

sdas [7]

The tree will keep growing each year 3 feet.

5 0

3 years ago

Read 2 more answers

BRAINLIESTTTTTTTTTTTT!! :)

skad [1K]

Your answer here would be letter A because for each year it is multiplied by 5 and so year 6 was 31,250 and 31,250 * 5 is 156,250

Have A Good Day :)

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4 years ago

Read 2 more answers

A study is conducted to determine if a newly designed text book is more helpful to learning the material than the old edition. T

CaHeK987 [17]

Answer:

We need to conduct a hypothesis in order to check if the mean is higher than 75, the system of hypothesis are :

Null hypothesis: $\mu \leq 75$

Alternative hypothesis: $\mu > 75$

A. One-Tailed

$z=\frac{82.2-75}{\frac{10.4}{\sqrt{10}}}=2.189$

$p_v =P(z>2.189)=0.0143$

If we compare the p value and the significance level given $\alpha=0.01$ we see that $p_v>\alpha$ so we can conclude that we have enough evidence to FAIL to reject the null hypothesis.

Step-by-step explanation:

Data given and notation

We have the following data: 84 94 80 88 77 68 90 74 96 71

We can calculate the sample mean with the following formula:

$\bar X =\frac{\sum_{i=1}^n X_i}{n}$

And replacing we got:

$\bar X=82.2$ represent the sample mean

$\sigma=10.4$ represent the population standard deviation

$n=10$ sample size

$\mu_o =75$ represent the value that we want to test

$\alpha=0.01$ 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 check if the mean is higher than 75, the system of hypothesis are :

Null hypothesis: $\mu \leq 75$

Alternative hypothesis: $\mu > 75$

A. One-Tailed

Since we know the population deviation, 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:

$z=\frac{82.2-75}{\frac{10.4}{\sqrt{10}}}=2.189$

P-value

Since is a ONE-TAILED test the p value would given by:

$p_v =P(z>2.189)=0.0143$

Conclusion

If we compare the p value and the significance level given $\alpha=0.01$ we see that $p_v>\alpha$ so we can conclude that we have enough evidence to FAIL to reject the null hypothesis.

5 0

3 years ago