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Afina-wow [57]
3 years ago
13

On Saturday a roadside vegetable stand sold 5 pumpkins and 20 watermelons and made $135.

Mathematics
1 answer:
ki77a [65]3 years ago
6 0

Answer:

Pumkins $7 and Watermelons $5

Step-by-step explanation:

let pumkins be P and watermelons be W s0

5P+20W=135 and 10P+16W=150

express first equation in terms of P

5P+20W=135

5P=135-20W (divide equation by 5)

P=27-4W

now express the second equation using the new P value

10P+16W=150

10(27-4W)+16W=150

270-40W+16W=150

120=24W

W=5

now plug in w value and solve for p

5P+20(5)=135

P=7

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Answer:

(a) The null hypothesis will be rejected.

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(c) The null hypothesis will not be rejected. The error is type II error.

Step-by-step explanation:

The hypothesis provided is:

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(a)

Decision rule for hypothesis testing, based on p-value, states that if the p-value is less than the significance level (α) then the null hypothesis is rejected and vice versa.

The significance level is α = 0.10

Then,

p-value = 0.03 < \alpha  = 0.10

Thus, the null hypothesis will be rejected.

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The null hypothesis is rejected stating that the value of μ is more than 0.

(b)

If the decision in​ (a) is an​ error, i.e. the null hypothesis is rejected when in fact it is true, this type of error is known as type I error.

(c)

The significance level is α = 0.01

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