Mathematics, 05.06.2021 01:50 raemcbride5678
Which statement is wrong?
A. Normal distribution is uniquely determined by the mean and standard deviation
B. All normal distributions can be transformed to the standard normal distribution
The mean and the median are the same for normal distributions
D. The larger the standard deviation in normal distribution, the less spread out the data
from the center.
The hours of sleep per week night among college students, is found to be normally distributed
with a mean of 7 hours and a standard deviation of 1 hour.
What range contains the middle 95% of hours slept per week night among college students?
A. 6 to 8 hours
B. 5 and 9 hours
C 1 to 10 hours
College students sleep distribution is N(7,1). The percentage of college students that need at
least 8 hours per night is about?
A. -0.50
B. 0.25
C. 0.50
College students sleep distribution is N(7,1). The percentage of college students that need at
least 8.5 hours per night is about?
A. 2.5%
B. 6.68%
C. 93.32%
What's the Z-socre corresponding to the upper tail area 0.50?
A. Z-1.645
B. Z-1.96
CZ-1.645
D. Z=-1.96
Scores on the SAT verbal test in recent years follow approximately the N(515,110 distribution
The proportion of students scoring between 460 and 550 is the closest to?
A. 0.309
B. 0.317
C. 0.626
D. 0.818
Answers: 1
Mathematics, 21.06.2019 14:30, preshoo9941
Find the zeros of the function. write the smaller solution first, and the larger solution second f(x)= (x+6)^2-49
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Mathematics, 21.06.2019 19:00, laneake96
Hector and alex traded video games. alex gave hector one fourth of his video games in exchange for 6 video games. then he sold 3 video games and gave 2 video games to his brother. alex ended up with 16 video games. how many video games did alex have when he started?
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Mathematics, 21.06.2019 20:00, AleOfficial101
Hell . what are the solutions to `10x^2 - 38x - 8 = 0`? is this when i find the factors and use the numbers within the factors to determine the zeros? i hope that made sense lol
Answers: 2
Which statement is wrong?
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