When both the measures are in the same units, then the ratio can be calculated.
1 hour = 60 minutes
⇒ 2 hours = 2 x 60 minutes
= 120 minutes
The ratio of 50 minutes to 2 hours is then:
50 : 120
⇒ 5 : 12
Answer:
(27,000 - 22,900)/27,000 = 0.1519 or 15.19% decrease in price.
Step-by-step explanation:
We are given the following variables:
μ = the sample mean = 152 pounds
σ = the standard deviation = 26 pounds
x = the sample value we want to test = 180 pounds
n = the sample size = unknown
MOE = margin of error = 4% = 0.04
Confidence level = 96%
The first thing we can do is to find for the value of z
using the formula:
z = (x – μ) / σ
z = (180 – 152) / 26
z = 1.0769 = 1.08
Since we are looking for the people who weigh more than
180 pounds, therefore this is a right tailed z test. The p value is:
p = 0.1401
Then we can use the formula below to solve for n:
n = z^2 * p * (1 – p) / (MOE)^2
n = 1.08^2 * 0.1401 * (1 – 0.1401) / (0.04)^2
n = 87.82 = 88
Therefore around 88 people must be surveyed.
Answer: 7
Step-by-step explanation: 7 is the y intercept in the slope intercept form. y=slopex+y-intercept
15 + 16 + 17 = 48
The answer is 48.