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avanturin [10]
3 years ago
9

Which of the following fractions is an improper fraction? 2/3 6/11 21/25 8/7

Mathematics
1 answer:
kirza4 [7]3 years ago
3 0

Answer:

8/7

Step-by-step explanation:

The Numerator is bigger than the denominator which in turn can be converted to a mixed fraction.

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Answer:Can you Repeat the Problem Please?

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2 years ago
A study by Consumer Reports showed that 64% of supermarket shoppers believesupermarket brands to be as good as national brands.
Elina [12.6K]

Answer:

z=\frac{0.614 -0.64}{\sqrt{\frac{0.64(1-0.64)}{145}}}=-0.652  

The p value would be given by:

p_v =P(z  

Since the p value is higher than the significance level we have enough evidence to FAIL to reject the null hypothesis and we can conclude that the true proportion is significantly less than 0.64 at 5% of significance

Step-by-step explanation:

Information given

n=145 represent the random sample taken

X=89 represent the number  of people who believed the supermarket brand was as good as the national brand

\hat p=\frac{89}{145}=0.614 estimated proportion of people who believed the supermarket brand was as good as the national brand

p_o=0.64 is the value to test

\alpha=0.05 represent the significance level

z would represent the statistic

p_v represent the p value

Hypothesis to test

We want to test if the true proportion is less than 0.64, the system of hypothesis are.:  

Null hypothesis:p \geq 0.64  

Alternative hypothesis:p < 0.64  

The statistic is given by:

z=\frac{\hat p -p_o}{\sqrt{\frac{p_o (1-p_o)}{n}}} (1)  

Replacing the info we got:

z=\frac{0.614 -0.64}{\sqrt{\frac{0.64(1-0.64)}{145}}}=-0.652  

The p value would be given by:

p_v =P(z  

Since the p value is higher than the significance level we have enough evidence to FAIL to reject the null hypothesis and we can conclude that the true proportion is significantly less than 0.64 at 5% of significance

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Step-by-step explanation:

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