Please help with question 8! BRAINLIEST to correct answer! (C is incorrect)
2 answers:
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18 hours.
Proportions and stuff.
= 
Cross multiply,
204x = 918 * 4
204x = 3672
/204 /204
x = 18
18 hours.
Proportions and stuff.
Cross multiply,
204x = 918 * 4
204x = 3672
/204 /204
x = 18
18 hours.
Answer:
a. 4.33.
Step-by-step explanation:
If there is only one correct answer out of four alternatives, the expected proportion of correct answers is p =0.25
Sample size (n) = 100 questions
The standard deviation of a proportion 'p' is given by:
Applying the given data:
If X is the number of correct responses in 100 guesses, the standard deviation of X is:
The standard deviation of X is 4.33 questions.