What is 3/5 divided by 4/7 divided by 9/10
2 answers:
You might be interested in
Answer:
A. Margin of error = 128.79
B. The 99% confidence interval for the population mean is (7661.21, 7918.79).
Step-by-step explanation:
We have to calculate a 99% confidence interval for the mean.
The population standard deviation is know and is σ=500.
The sample mean is M=7790.
The sample size is N=100.
As σ is known, the standard error of the mean (σM) is calculated as:
The z-value for a 99% confidence interval is z=2.576.
The margin of error (MOE) can be calculated as:
Then, the lower and upper bounds of the confidence interval are:
The 99% confidence interval for the population mean is (7661.21, 7918.79).
Answer:
The mean of X is 1.17.
The standard deviation of X is 1.009.
Step-by-step explanation:
<em>The question is incomplete: 1ean and Standard Deviation of Senior Citizens In the 2010 US Census, we learn that of all people in the US </em><em>13% </em><em>are senior citizens. Let the random variable X represent the number of senior citizens in a random sample of 9 people. Find the mean and standard deviation of this random variable. Enter the exact answer for the mean, and round your answer for the standard deviation to three decimal places.</em>
<em />
This variable X can be modeled as a binomial random variable, with n=9 and p=0.13.
The mean of X is:
The standard deviation of X is:
Answer:
<em>f(x) and g(x) and not inverse functions</em>
Step-by-step explanation:
Given
Required
Determine f(g(x))
Determine g(f(x))
Determine if both functions are inverse:
Calculating f(g(x))
Expand Brackets
Calculating g(f(x))
Expand Brackets
Checking for inverse functions
Represent f(x) with y
Swap positions of x and y
Subtract 9 from both sides
Divide through by 3
Take square root of both sides
Represent y with g(x)
Note that the resulting value of g(x) is not the same as
<em>Hence, f(x) and g(x) and not inverse functions</em>