Answer: The professor was not accurate with his hypothesis.
Null hypothesis: P1 = 12.5%, P2 = 42.5%, P3 = 45%
The alternate hypothesis: At least one proportion of the student will differ from the others.
Step-by-step explanation: To check if the professors hypothesis were inaccurate.
What percentage of student bought a hard copy of the book.
(25 ÷ 200) × 100 = 12.5%
What percentage of the student printed it from the web.
(85 ÷ 200) × 100 = 42.5%
What percentage of the students read it online.
(90 ÷ 200) × 100 = 45%
This means that the professor was not accurate with his hypothesis. Because the proportion of student in his hypothesis was not the same in the actual.
Therefore; the null hypothesis are
P1 = 12.5%, P2 = 42.5%, P3 = 45%
The alternative hypothesis will state that at least one of the proportion will be different from the others.
Answer:
Step-by-step explanation:
Since 0.4virus occurs per week and it cost the university $1000 to remove one virus.
There next week we expect to 0.4 virus and cost required will be =0.4×$1000. this will amount to $400
Answer:
52.
Step-by-step explanation:
shaded = (3²) + (2²)
shaded = 9 + 4
shaded = 13
Unshaded = (3 x 2) + (2 x 3)
Unshaded = 6 + 6
Unshaded = 12
All = 12 + 13
All = 25
100 / 25 = 4
4 x 13 = 26 x 2
26 x 2 = 52.
Answer:
i dont know this is to hard
Step-by-step explanation:
pay back for saying that on my question
Solve for z:
42 = -7 (z - 3)
42 = -7 (z - 3) is equivalent to -7 (z - 3) = 42:
-7 (z - 3) = 42
Divide both sides of -7 (z - 3) = 42 by -7:
(-7 (z - 3))/(-7) = 42/(-7)
(-7)/(-7) = 1:
z - 3 = 42/(-7)
The gcd of 42 and -7 is 7, so 42/(-7) = (7×6)/(7 (-1)) = 7/7×6/(-1) = 6/(-1):
z - 3 = 6/(-1)
Multiply numerator and denominator of 6/(-1) by -1:
z - 3 = -6
Add 3 to both sides:
z + (3 - 3) = 3 - 6
3 - 3 = 0:
z = 3 - 6
3 - 6 = -3:
Answer: z = -3