Starting on Day 1 with 1 jumping jack, Kiera doubles the number of jumping jacks she does every day. How many jumping jacks will
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Answer:
The p value obtained was a very low value and using the significance level given we have
so we can conclude that we have enough evidence to reject the null hypothesis, and we can said that at 5% of significance the proportion of lawyers had used some form of advertising for their business is significantly higher than 0.25 or 25% .
Step-by-step explanation:
1) Data given and notation
n=200 represent the random sample taken
X=63 represent the lawyers had used some form of advertising for their business
estimated proportion of lawyers had used some form of advertising for their business
is the value that we want to test
represent the significance level
Confidence=95% or 0.95
z would represent the statistic (variable of interest)
represent the p value (variable of interest)
2) Concepts and formulas to use
We need to conduct a hypothesis in order to test the claim that more than 25% of all the lawyers in Boston advertise for their business:
Null hypothesis:
Alternative hypothesis:
When we conduct a proportion test we need to use the z statistic, and the is given by:
(1)
The One-Sample Proportion Test is used to assess whether a population proportion is significantly different from a hypothesized value
.
3) Calculate the statistic
Since we have all the info requires we can replace in formula (1) like this:
4) Statistical decision
It's important to refresh the p value method or p value approach . "This method is about determining "likely" or "unlikely" by determining the probability assuming the null hypothesis were true of observing a more extreme test statistic in the direction of the alternative hypothesis than the one observed". Or in other words is just a method to have an statistical decision to fail to reject or reject the null hypothesis.
The significance level provided . The next step would be calculate the p value for this test.
Since is a right tailed test the p value would be:
The p value obtained was a very low value and using the significance level given we have
so we can conclude that we have enough evidence to reject the null hypothesis, and we can said that at 5% of significance the proportion of lawyers had used some form of advertising for their business is significantly higher than 0.25 or 25% .
<u>Given</u>:
The measure of arc XY is (31x)°
The measure of arc YZ is (35x - 16)°
We need to determine the value of x, measure of arc XYZ and arc XZ.
<u>Value of x:</u>
From the figure, it is obvious that the arcs XY and YZ are congruent.
Thus, we have;
Subtracting both sides by 35x, we have;
Thus, the value of x is 4.
<u>Measure of arc XYZ:</u>
The measure of arc XYZ is given by
The measure of arc XY is given by
The measure of arc YZ is given by
Hence, the measure of arc XYZ is given by
Therefore, the measure of arc XYZ is 248°
<u>Measure of arc XZ:</u>
The measure of arc XZ is given by
Substituting the values, we have;
Thus, the measure of arc XZ is 112°