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Statistics
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whenever a data value is less than the​ mean

a.) he corresponding z-score is negative

b.) we do not consider it

c.) the corresponding z-score is positive

d.) it is considered unusual.

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Karol A.
Karol A.Lv10
15 Mar 2021
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Related textbook solutions

Introductory Statistics
OER Edition, 2013
Openstax
ISBN: 9781938168208

Related questions

The mean of a set of data is 4.78 and its standard deviation is 2.23. Find the z score of a value of 9.11.

(a) 2.24

(b) 2.14

(c) 1.94

(d) 1.75

(1 point) A random sample of 130 observations is selected from a binomial population with unknown probability of success p. The computer value of is 0.64.

    (1) Test : : p = 0.65 against : p > 0.65. Use α= 0.05.

test statistic z =

critical z score

The final conclusion is 

⭕ A. We can reject the null hypothesis that p = 0.65 and accept that p is > 0.65.

⭕ B. There is not sufficient evidence to reject the null hypothesis that p = 0.65.

    (2) Test : p = 0.5 against :p < 0.65. Use α = 0.01.

test statistic z =

critical z score

The final conclusion is 

⭕ A. We can reject the null hypothesis that p = 0.5 and accept that p is < 0.5.

⭕ B. There is not sufficient evidence to reject the null hypothesis that p = 0.5.

   (3) Test : p = 0.55 against : p ≠ 0.55. Use α = 0.01.

test statistic z =

positive critical z score

 

A​ student's course grade is based on one midterm that counts as ​% of his final​ grade, one class project that counts as ​% of his final​ grade, a set of homework assignments that counts as ​% of his final​ grade, and a final exam that counts as ​% of his final grade. His midterm score is ​, his project score is ​, his homework score is ​, and his final exam score is .

What is his overall final​ score?

What letter grade did he earn​(A, B,​ C, D, or​ F)?

(Assume that a mean of 90 or above is an​ A, a mean of at least 80 but less than 90 is a​ B, and so on.)

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