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lubasha [3.4K]
2 years ago
8

A store manager predicts that 100 hats will be sold if each hat costs $12. The manager predicts that 4 less hats will be sond fo

r every $1 increase in price. For what prices can the manager predict that 60 hats will be sold?
Mathematics
1 answer:
vampirchik [111]2 years ago
3 0

Answer:

100-60=40

40/4=10

10*$1=$10

$12+$10=$22

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Answer:

t=\frac{1.20-1.25}{\frac{0.14}{\sqrt{49}}}=-2.50    

Step-by-step explanation:

Data given and notation  

\bar X=1.20 represent the sample mean given

\sigma = 0.14 represent the population standard deviation

n=49 sample size  

\mu_o =1.25 represent the value that we want to test

t would represent the statistic (variable of interest)  

State the null and alternative hypotheses.  

We need to conduct a hypothesis in order to check if the true mean for the gasoline prices is lower than 1.25, the system of hypothesis would be:  

Null hypothesis:\mu \geq 1.25  

Alternative hypothesis:\mu < 1.25  

If we analyze the size for the sample is > 30 but we don't know the population deviation so is better apply a t test to compare the actual mean to the reference value, and the statistic is given by:  

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

Calculate the statistic

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

t=\frac{1.20-1.25}{\frac{0.14}{\sqrt{49}}}=-2.50    

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Answer:

yes, idk if thats the answer you are looking for though

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The answer is the "y" value of (2, 3),


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20x=9

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