GreenHerbz206

13.03.2020 • 

Mathematics

What is the average height of 300 students in an instructor's class? To determine this, the instructor measures the heights of 30 students selected at random, obtaining a 95% confidence interval for the average height from 64.6 to 67.1 inches. a) In complete sentences, give an interpretation of what this 95% confidence interval for the 300 students' averge height means. There is 95% chance that the height of a student lies within this interval. We are 95% confident that the average height of all 300 students lies within this interval. We are 95% confdident that the average height of the sample of 30 students lies within this interval We are 95% confident that the weight of a student lies within this interval. Correct: Your answer is correct. b) The sample mean is 66.94 Incorrect: Your answer is incorrect. inches. (Round to two decimal places)

Ответ:

misscheoneyo

16.12.2020

Mathematics

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A) 4, 13, 40

B) a) 0.07 b) 0.25 c) 0.77

Step-by-step explanation:

We are given the following in the question:

Number of cards in a deck  = 52

Sample points are there in the event that a king is selected

= Number of kings in a deck of card = 4

Sample points are there in the event that a diamond is selected

= Number of diamond card in a deck of card = 13

Sample points are there in the event that a non face card

= Number of non-face card in a deck of card = 52-12 = 40

Formula:

(a) Ace

(b) Club

(c) Non face card

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