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Illusion [34]
3 years ago
13

HELP ASAP

Mathematics
1 answer:
atroni [7]3 years ago
3 0
The answer to your question is B.
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Is 0.23 a rational number? choose the best explanation
Delvig [45]

Answer:

Yes it is a rational number. (There are no explanations)

Step-by-step explanation:

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3 years ago
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An increased number of colleges have been using online resources to research applicants. According to a study from last​ year, 3
Aneli [31]

Answer:

D. H0​: p ≤0.36 H1​: p>0.36

$$(Right tail test) Z_{\alpha}=Z_{0.1}=1.28155

Z_p=-0.25516

D. Reject H0. There is sufficient evidence to support the hypothesis that the proportion of admissions officers who visit an applying​ students' social networking page has increased in the past year

Step-by-step explanation:

To solve this problem, we run a hypothesis test about the population proportion.

$$Sample proportion: $\bar P=0.47\\Sample size n=100$\\Significance level \alpha=0.10$\\(Left tail test) Z_{1-\alpha}=Z_{0.90}=-1.28155$\\(Right tail test) Z_{\alpha}=Z_{0.1}=1.28155$\\(Two-tailed test) $Z_{1-\alpha/2}=Z_{0.95}=-1.64485$ and $ Z_{\alpha/2}=Z_{0.05}=1.64485\\\\

The appropriate hypothesis system for this situation is:

H_0:\pi_0=0.35\\H_a:\pi_0 > 0.35\\\\$Proportion in the null hypothesis is:\\\pi_0=0.35\\\\

$$The test statistic is $Z=\frac{(\bar P-\pi_0)\sqrt{n}}{\sqrt{\pi_0(1-\pi_0)}}\\$The calculated statistic is Z_c=\frac{(0.47-0.35)\sqrt{100}}{\sqrt{0.35(1-0.35)}}=-0.25516\\p-value = P(Z \geq Z_c)=0.01620\\\\

Since, the calculated statistic Z_c is greater than critical Z_{\alpha}, the null hypothesis should be rejected. There is enough statistical evidence to state that the proportion of admissions officers who visit an applying​ students' social networking page has increased in the past year.

5 0
3 years ago
If 6 sandwich rolls cost $1.44, how much will 26 rolls cost?
tresset_1 [31]

$6.24. This is because 1.44 / 6 = 0.24, and 0.24 x 26 = 6.24.

4 0
4 years ago
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5) Tom knows that in his school 10 out of every 85 students are left-handed.
Alina [70]

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yes well hi and hit the WOW

Step-by-step explanation:

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Choose the situations that state an appropriate domain for the function. Mark ALL that apply.
marishachu [46]

Answer:

B) A grocery store sells salmon by the pound. The function C(x) represents the cost, in dollars, of x pounds of salmon. An appropriate domain for the function is positive rational numbers.

C) A ball was thrown into the air with an initial velocity of 65 feet per second. The height of the ball after t seconds is represented by the equation h = 65t − 16t2. An appropriate domain for the function is positive rational numbers.

D) A taxi company charges $2.50 plus $1.75 for each mile driven. A function C(x) shows how much a taxi fare cost. An appropriate domain of C(x) is all whole numbers.

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