Answer: 1.467
Step-by-step explanation:
Formula of Margin of Error for (n<30):-
Given : Sample size : n= 22
Level of confidence = 0.90
Significance level :
By using the t-distribution table ,
Critical value :
Standard deviation:
Then, we have
Hence, the margin of error for the confidence interval for the population mean with a 90% confidence level =1.467
Answer:
The critical value can be founded in the normal standard distribution table using the value of and we got . Replacing the info given we got:
Step-by-step explanation:
For this case we have the following info given:
represent the population deviation
represent the sample mean
represent the sample size
And we want to find the margin of error for a confidence level of 95%. So then the significance level would be and . The margin of error is given by:
The critical value can be founded in the normal standard distribution table using the value of and we got . Replacing the info given we got:
Answer:
No. The correct answer is x = 4i. The mistake is made on the penultimate step where "Mark" squares both sides, eliminating the negative sign.
Step-by-step explanation:
We can see that the answer is incorrect, because if we plug it back into the original equation, we get:
This of course is obviously incorrect. The mistake is made in squaring away the negative sign in solving the problem. An easier way to look at this is to get rid of √x, and substitute it for "n", and see what we get:
If we swap √x back in, we get:
√x = -2
x = 4i
let's solve it correctly:
It is basically asking you to find where the equation crosses the d-axis. 2x^2 + 12x -14 = (x-1)(2x-14). x-1=0. x=1. 2x-14=0. 2x=14. x=7. The solution/roots/zeros would be 1 and 7
Answer:
=
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<u>Explanation</u>
Separate the values with the variables and add them together, the same case for those without the variables.