Canadian teens that use Is there a statistically significant difference between the use of social media by U.S. teens and Canadian teens? No, there is no difference between the proportion of U.S. teens that use Instagram and the proportion of Canadian teens that use Instagram because both the lower limit and the upper limit of the confidence interval are negative values. Yes, the proportion of U.S. teens that use Instagram is significantly less than the proportion of Canadian teens that use Instagram difference because both the lower limit and the upper limit of the confidence interval are positive values. Yes, the proportion of U.S. teens that use Instagram is significantly less than the proportion of Canadian teens that use Instagram difference because both the lower limit and the upper limit of the confidence interval are negative values. Yes, the proportion of U.S. teens that use Instagram is significantly more than the proportion of Canadian teens that use Instagram difference because both the lower limit and the upper limit of the confidence interval are positive values. Yes, the proportion of U.S. teens that use Instagram is significantly more than the proportion of Canadian teens that use Instagram difference because both the lower limit and the upper limit of the confidence interval are negative values. No, there is no difference between the proportion of U.S. teens that use Instagram and the proportion of Canadian teens that use Instagram because both the lower limit and the upper limit of the confidence interval are positive values.

A genetic experiment with peas resulted in one sample of offspring that consisted of 421 green peas and 167 yellow peas. Construct a 95​% confidence interval to estimate of the percentage of yellow peas. It was expected that​ 25% of the offspring peas would be yellow. Given that the percentage of offspring yellow peas is not​ 25%, do the results contradict​ expectations?

psychologist would like to estimate the proportion of Americans that say "the future of the nation is a significant source of stress for me." To help form an estimate, the psychologist randomly selected 917 Americans and found that 73.2% of the sample agreed with the statement "the future of the nation is a significant source of stress for me." Using a 98% confidence level, determine the margin of error, E and a confidence interval for the true proportion of all Americans that say the "the future of the nation is a significant source of stress for me." Report the confidence interval using interval notation Round solutions to four decimal places, if necessary. The margin of error is given by E = A 98% confidence interval is given by

You are a therapist that has developed a new app to help people treat their anxiety.  You would like to compare the outcomes of people that use the app to those that receive therapy services.  You recruit 50 participants that identify as having problems with anxiety and you randomly assign each person to either use the app for 1 month or come in for therapy for 1 month.  At the end, you give everyone an anxiety measure so that you can compare the difference between the two groups.  Which statistical test would be best to determine if there is a significant difference in anxiety between the two groups following an intervention?