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yaroslaw [1]
3 years ago
13

Maria wanted to know if there was a connection between her coffee consumption and how well she slept that night. For weeks, Mari

a recorded how many cups of coffee she drank in the morning and how many hours she slept that night.
What is the probability that a randomly selected day is one when she slept exactly 7 hours given that the day is one when she drank exactly 1 cup of coffee? (serious answers only please)

A. 3/15
B. 3/10
C. 7/15
D. 7/10

Mathematics
1 answer:
____ [38]3 years ago
6 0

Answer:

A

Step-by-step explanation:

I did this

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Which mixed number is equivalent to the improper function below? 46/10
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Answer:

B. 4 and 6/10

Step-by-step explanation:

in order to find this answer i've always had a trick where i first off find an even number to divide these with and in this case that would be 4 and then the leftovers would be 6/10 and in this case your answer would be right there 4 and 6/10 but if needed to be simplified it would be 4 and 3/5

hope this helps, if it did please make sure to like and rate and give me the brainliest if possible!

have a good day!

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Zearn m3 l4 math problem please help me
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Answer:

diameter 5

circumference 15.7

Step-by-step explanation:

Could you mark brainliest please?

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2 years ago
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512, 256, 128, 64, __, __, __, ...​
Cerrena [4.2K]

The complete pattern is: 512, 256, 128, 64, 32, 16, 8, ( and extended ) 4, 2, 1!

I do this pattern in my head literally all the time!

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3 years ago
Need help!! what is the ewuation of the like shown?
Marta_Voda [28]

Answer:

<em><u>An</u></em> equation is y = 2x + 4.

Step-by-step explanation:

<em><u>ANOTHER</u></em> equation is y - 2 = 2(x + 1)

4 0
2 years ago
A random sample of 850 births included 434 boys. Use a 0.10 significance level to test the claim that 51.5​% of newborn babies a
Molodets [167]

Answer:

A

Null hypothesis: H0: p = 0.515

Alternative hypothesis: Ha ≠ 0.515

z = -0.257

P value = P(Z<-0.257) = 0.797

Decision; we fail to reject the null hypothesis. That is, the results support the belief that 51.5​% of newborn babies are​ boys

Rule

If;

P-value > significance level --- accept Null hypothesis

P-value < significance level --- reject Null hypothesis

Z score > Z(at 90% confidence interval) ---- reject Null hypothesis

Z score < Z(at 90% confidence interval) ------ accept Null hypothesis

Step-by-step explanation:

The null hypothesis (H0) tries to show that no significant variation exists between variables or that a single variable is no different than its mean. While an alternative Hypothesis (Ha) attempt to prove that a new theory is true rather than the old one. That a variable is significantly different from the mean.

For the case above;

Null hypothesis: H0: p = 0.515

Alternative hypothesis: Ha ≠ 0.515

Given;

n=850 represent the random sample taken

Test statistic z score can be calculated with the formula below;

z = (p^−po)/√{po(1−po)/n}

Where,

z= Test statistics

n = Sample size = 850

po = Null hypothesized value = 0.515

p^ = Observed proportion = 434/850 = 0.5106

Substituting the values we have

z = (0.5106-0.515)/√(0.515(1-0.515)/850)

z = −0.256677

z = −0.257

To determine the p value (test statistic) at 0.10 significance level, using a two tailed hypothesis.

P value = P(Z<-0.257) = 0.797

Since z at 0.10 significance level is between -1.645 and +1.645 and the z score for the test (z = -0.257) which falls with the region bounded by Z at 0.10 significance level. And also the one-tailed hypothesis P-value is 0.797 which is greater than 0.10. Then we can conclude that we have enough evidence to FAIL to reject the null hypothesis, and we can say that at 10% significance level the null hypothesis is valid.

5 0
3 years ago
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