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bonufazy [111]
2 years ago
6

Plz plz plz help me no links but PLZ ANYTHING

Mathematics
1 answer:
Svetradugi [14.3K]2 years ago
5 0

Answer:

Yesterday a lady on the subway asked me what my favorite subject was. I said math and she looked at me weird.So I was trying to think of a way to properly explain it to her. I wanted to provide her with so many details. So since I work at a company of calculaters I used how the manager makes them as an example. She was surprised with all the details I game her and told me that my manager needs to give me a promotion...I agree with her.

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PLease what is the answer!
lesantik [10]

Answer:

74

Step-by-step explanation:

(80+96+81+89+64)÷5 = 84

Used the formula to get the average of a number. Hope this helps

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The scale on a map is 1 inch : 500 miles.
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According to the norms established for a reading comprehension test, eighth-graders should average 83.2 with a standard deviatio
joja [24]

Answer:

t=\frac{86.7-83.2}{\frac{8.6}{\sqrt{45}}}=2.73    

p_v =P(t_{44}>2.73)=0.0045    

If we compare the p value and a significance level given \alpha=0.01 we see that p_v so we can conclude that we have enough evidence to reject the null hypothesis, so we can conclude that the population mean is signficantly higher than 83.2 at 1% of significance.

Step-by-step explanation:

Data given and notation    

\bar X=86.7 represent the average life for the sample    

s=8.6 represent the population standard deviation    

n=45 sample size    

\mu_o =83.2 represent the value that we want to test    

\alpha=0.01 represent the significance level for the hypothesis test.    

t 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 apply a two tailed  test.  

What are H0 and Ha for this study?    

Null hypothesis:  \mu \leq 83.2  

Alternative hypothesis :\mu > 83.2  

Compute the test statistic  

The statistic for this case is given by:  

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

t-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:    

t=\frac{86.7-83.2}{\frac{8.6}{\sqrt{45}}}=2.73    

Give the appropriate conclusion for the test  

First we need to calculate the degrees of freedom given by:

df=n-1=45-1=44

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

p_v =P(t_{44}>2.73)=0.0045    

Conclusion    

If we compare the p value and a significance level given \alpha=0.01 we see that p_v so we can conclude that we have enough evidence to reject the null hypothesis, so we can conclude that the population mean is signficantly higher than 83.2 at 1% of significance.

8 0
3 years ago
For the function y=-2sin(pi/12(x-2) what is the maximum value
pogonyaev

Answer:

Step-by-step explanation:

The max value of the sine function is 1.  

If we multiply it by 2, we get 2 sin x, whose max. value is 2.

If we multiply the sine function by -2, the max value of this functin is still 2.

3 0
2 years ago
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