A. State the correct null and alternative hypotheses. B. Assuming the sampling distribution of p is approximately normally distributed the mean and standard error are: Mean and Standard Error C. Find the standard score (z) and p-value for test. D. Do you Reject or Do Not Reject the null hypothesis based on 0.05 significance level? E. What is your conclusion in context to this test? a. There is enough evidence to show that the population proportion of left-handed people is 10%. b. There is enough evidence to show that the population proportion of left-handed people is different than 10%. c. There is not enough evidence to show that the population proportion of left-handed people is 10%. F. The 95% confidence interval for the population proportion is (0.03, 0.11). Does this support your conclusion? Why or why not? G. Explain what a Type I Error would be in context to this problem.

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15. A study done says that 10% of the population is left-handed. To test this theory, I survey 200
people and find that 14 of them are left-handed. Is this enough evidence to say that the study is
wrong?
A. State the correct null and alternative hypotheses.
B. Assuming the sampling distribution of p is approximately normally distributed the mean and
standard error are:
Mean
and Standard Error
C. Find the standard score (z) and p-value for test.
D. Do you Reject or Do Not Reject the null hypothesis based on 0.05 significance level?
E. What is your conclusion in context to this test?
a. There is enough evidence to show that the population proportion of left-handed people
is 10%.
b. There is enough evidence to show that the population proportion of left-handed people
is different than 10%.
c. There is not enough evidence to show that the population proportion of left-handed
people is 10%.
F. The 95% confidence interval for the population proportion is (0.03,0.11). Does this support
your conclusion? Why or why not?
G. Explain what a Type I Eror would be in context to this problem.
Transcribed Image Text:15. A study done says that 10% of the population is left-handed. To test this theory, I survey 200 people and find that 14 of them are left-handed. Is this enough evidence to say that the study is wrong? A. State the correct null and alternative hypotheses. B. Assuming the sampling distribution of p is approximately normally distributed the mean and standard error are: Mean and Standard Error C. Find the standard score (z) and p-value for test. D. Do you Reject or Do Not Reject the null hypothesis based on 0.05 significance level? E. What is your conclusion in context to this test? a. There is enough evidence to show that the population proportion of left-handed people is 10%. b. There is enough evidence to show that the population proportion of left-handed people is different than 10%. c. There is not enough evidence to show that the population proportion of left-handed people is 10%. F. The 95% confidence interval for the population proportion is (0.03,0.11). Does this support your conclusion? Why or why not? G. Explain what a Type I Eror would be in context to this problem.
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