I just need to find out the last question that is in red. I don't know how to find the year when the median house values will be
equal. I'm really confused about how to find it
1 answer:
Answer:
1924.3
Step-by-step explanation:
Ok
You need to write an expression for the change in value
the change is linear, so you will get a line equation y = mx + b
y-axys : value
x-axys : years
New Hampshire:
Slope =
the y-intercept will be 37600 because you can assume that 1950 = 0, and 2000 = 50
y = 1914*x + 37600
Massachussets:
Slope =
Same as above, the y-intercept is 55400
y = 2606*x + 55400
Now you need to equal the value for both and find the year "x"
1914x + 37600 = 2606x + 55400
- 692x = 17800
x = -25.7
Since i considered x = 0 to be 1950; the actual year is 1950 - 25.7 = 1924.3
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Answer:
And rounded up we have that n=350
Step-by-step explanation:
Previous concepts
A confidence interval is "a range of values that’s likely to include a population value with a certain degree of confidence. It is often expressed a % whereby a population means lies between an upper and lower interval".
The margin of error is the range of values below and above the sample statistic in a confidence interval.
Normal distribution, is a "probability distribution that is symmetric about the mean, showing that data near the mean are more frequent in occurrence than data far from the mean".
represent the real population proportion of interest
represent the estimated proportion for the sample
n is the sample size required (variable of interest)
represent the critical value for the margin of error
Solution to the problem
The population proportion have the following distribution
In order to find the critical value we need to take in count that we are finding the interval for a proportion, so on this case we need to use the z distribution. Since our interval is at 95% of confidence, our significance level would be given by and
. And the critical value would be given by:
The margin of error for the proportion interval is given by this formula:
(a)
And on this case we have that and we are interested in order to find the value of n, if we solve n from equation (a) we got:
(b)
And replacing into equation (b) the values from part a we got:
And rounded up we have that n=350
<h2>Hey there! </h2><h2>The Reciprocal of 159 is:</h2>