Problem 1: Empire State College would like to know more about the age distribution of its online statistics students.
Do the data provide evidence that the mean age is not 30 years?

Problem 2: Pew Research says that 53% of American adults call themselves middle class.
The sample size was n=2413.
http://pewresearch.org/databank/dailynumber/?NumberID=559
How confident are you that between 51% and 55% of Americans call themselves middle class?
How likely is it that more than 55% call themselves middle class?

Problem 3: Some have suggested that a higher proportion of women than men under 35 use online education because they can combine online education with childcare.
Do the ESC online statistics students offer any insight into that question?
You must do a test of significance to answer this question.

Problem 4: Is there evidence that more than half the online statistics students are over 30?

The solution provides step-by-step method of performing both Z-Test for Two Samples and Z-Test for Two Proportions. All the steps of hypothesis testing (formulation of null and alternate hypotheses, selection of significance level, choosing the appropriate test-statistic, decision rule, calculation of test-statistic and conclusion) have been explained and the statistical analysis has been shown in details. Calculation of Z-Score has also been shown. Some calculations have been performed in EXCEL for better understanding.

A research organization has collected the following data on household size and telephone ownership for 200 U.S. households at the 0.05 level, are the two variables independent? Based on the chi-square table, what is the most accurate statement that can be made about the p-value for the test?

Perform a 5 step hypothesis test on the given data for the following null and alternative hypothesis:
Null Hypothesis - TB is greater in the U.S. than foreign countries between 1993-2009
Alternative Hypothesis - TB is less in the U.S. than in foreign countries between 1993-2009.
See the attached files.

Question: Determine the p-value for each of the following hypothesis-testing situations:
a. H0: p = 0.25 and Ha: p does not = 0.25; z test value = 1.84
b. H0: u >/= 13.5 and Ha: u < 13.5; t test value = -1.94 d.f. = 10

Tourism is one consideration for CoffeeTime's future, A survey of 1,233 visitors to mumbai last year revealed that 110 visited a small cafe during their visit. Laura claims that 10% of tourists will include a visit to a cafe.

A study of 20 families in a certain large city showed that the average income was $33,210 in 2000 with a standard deviation of $1800. Test the hypothesis that the true average income in this city was actually $31,000 against the hypothesis that it was more. Use a level of significance of 5% (hint: This is a one-sided test).

A sample of n=9 scores is obtained from a normal population distribution with o-=12. The sample mean is M=60.
a- with a two-tailed test and o=.05,use the sample data to test the hypothesis that the population mean is u=65.
b- with a two-tailed test and o=.05, use the ample data to test the hypothesis that the population me

Please see the attached file.
A hypothesis test is used to test a claim. You get 1.75 as your test statistic and 1.59 as your critical value for a right-tailed test. Which of the following is the correct decision statement for the test?
A. Reject the null hypothesis
B. Claim the null hypothesis i

Here are heart rates for a sample of 30 students before and after a class break. At alpha =.05, was there a significant diffeence in the mean heart rate?
(a) State the hypotheses.
(b) State the decision rule and sketch it.
(c) Find the test statistic
(d) Make a decision.
(e) Find the p-value

Question :
The mean score on a standardized psychology test is supposed to be 50. Believing that a group of psychologists will score higher, we test a random sample of 11 psychologists. Their mean score is 45 with s=3. Test at a level of significance of 1%.