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laila [671]
3 years ago
13

Suppose that competing hypotheses for a test are H0: p1 - p2 = 0 versus HA: p1 - p2 ≠ 0. A 95% confidence interval for the diffe

rence between the population proportions is calculated as [0.25, 0.40]. At the 5% significance level, the correct conclusion to the hypothesis test is
Mathematics
1 answer:
timofeeve [1]3 years ago
8 0

Answer:

Step-by-step explanation:

Given that in a hypothesis test for comparison of two proportions p1 and p2

two tailed at 95% confidence level

the confidence interval was (0.25,0.40)

The hypothesis was for

H0: p1 - p2 = 0 versus HA: p1 - p2 ≠ 0

As per null hypothesis the difference between proportions should be 0.

In our confidence interval we find lower limit is 0.25 and upper limit is 0.40

i.e. 0 is not contained in this interval and 0 is significantly far from this 0.25 even lower limit

So we can conclude that the difference between proportions cannot be 0 but is positive

So reject null hypothesis.

There is significant difference between proportions at 95% confidence level

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Answer:

$ 2,600 was invested at 4% and $ 3,600 was invested at 9%.

Step-by-step explanation:

Given that in investing $ 6,200 of a couple's money, a financial planner put some of it into a savings account paying 4% annual simple interest, and the rest was invested in a riskier mini-mall development plan paying 9% annual simple interest, and the combined interest earned for the first year was $ 428, to determine how much money was invested at each rate, the following calculation must be performed:

3000 x 0.04 + 3200 x 0.09 = 408

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2600 x 0.04 + 3600 x 0.09 = 428

Therefore, $ 2,600 was invested at 4% and $ 3,600 was invested at 9%.

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Answer:

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Step-by-step explanation:

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Answer:

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Step-by-step explanation:

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