What is the the equation 2/3n = 7/8
2 answers:
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Answer:
Assuming that there are only 2 flavors of the sweet ⇻ strawberry & orange.
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P (strawberry flavored sweet) = 0.8
P (orange flavored sweet) = ?
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Now, we know that ➳ the value of probability ≤ 1. So, the probability of orange flavored sweets is less than 1.
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So,
P (orange flavored sweet) = 1 - P (strawberry flavored sweet)
P (orange flavored sweet) =
P (orange flavored sweet) =
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✐ The probability that the sweet is orange flavored is <u>0</u><u>.</u><u>2</u>
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Answer:
Step-by-step explanation:
The summary of the given data includes;
sample size for the first school = 42
sample size for the second school = 34
so 16 out of 42 i.e = 16 and 18 out of 34 i.e
= 18 have ear infection.
the proportion of students with ear infection Is as follows:
= 0.38095
= 0.5294
Since this is a two tailed test , the null and the alternative hypothesis can be computed as :
level of significance ∝ = 0.05,
Using the table of standard normal distribution, the value of z that corresponds to the two-tailed probability 0.05 is 1.96. Thus, we will reject the null hypothesis if the value of the test statistics is less than -1.96 or more than 1.96.
The test statistics for the difference in proportion can be achieved by using a pooled sample proportion.
The pooled standard error can be computed by using the formula:
The test statistics is ;
z = - 1.368
Decision Rule: Since the test statistics is greater than the rejection region - 1.96 , we fail to reject the null hypothesis.
Conclusion: There is insufficient evidence to support the claim that a difference exists between the proportions of students who have ear infections at the two schools