Answer:
x=7
Step-by-step explanation:
2x-10=4 add 10 to both sides
2x=14 divide both sides by 2
x=7
Answer:
The experimental probability is 4/25
Step-by-step explanation:
Here, we want to get an experimental probability
To get this, we will need to divide the number of new customers by the total number of calls made
Mathematically, we have this as 28/175
= 4/25
The answers to the questions are:
1. The confidence level is 99 percent.
2. We have to conclude that there is no sufficient evidence available to support this claim because the Confidence interval contains 75 sec.
<h3>How to solve for the confidence level</h3>
1. The confidence level here should be
1- 0.01 = 0.99
= 99 percent
Given that, 99% confidence interval for population mean (μ) is (-34.1 sec u< u < 264.1 ) seconds.
We are to test the claim that the population mean is greater than 75 sec.
2.
The given confidence interval contains the value of 75 sec, so there is not sufficient evidence to support the claim that the mean is greater than 75 sec.
Read more on confidence interval here:
brainly.com/question/20309162
#SPJ1
Step-by-step explanation:
Not sure but try this:
4×3/8= 3/8 + 3/8 + 3/8 + 3/8= 4×3/8 = 12/8 = 3/2