In april and may of 2011, the pew research center surveyed cell phone users about voice calls and text messaging. they surveyed a random sample of 1914 cell phone users. 75% of the sample use text messaging. the 95% confidence interval is (73.1%, 76.9%). which of the following is an appropriate interpretation of the 95% confidence interval? a. there is a 95% probability that the proportion of all cell phone users who use text messaging is between 73.1% and 76.9%.

b. we can be 95% confident that the proportion of the sample who use text messaging is between 73.1% and 76.9%.

c. 95% of samples will have between 73.1% and 76.9% of respondents who use text messaging.

d. we can be 95% confident that the proportion of all cell phone users who use text messaging is between 73.1% and 76.9%.

Determine whether the samples are independent or dependent. upper a data set includes the morning and evening temperature for the lasta data set includes the morning and evening temperature for the last 90 days.90 days.

The table shows population statistics for the ages of best actor and best supporting actor winners at an awards ceremony. the distributions of the ages are approximately bell-shaped. compare the z-scores for the actors in the following situation. best actor best supporting actor muequals42.0 muequals49.0 sigmaequals7.3 sigmaequals15 in a particular year, the best actor was 59 years old and the best supporting actor was 45 years old. determine the z-scores for each. best actor: z equals best supporting actor: z equals (round to two decimal places as needed.) interpret the z-scores. the best actor was (more than 2 standard deviations above more than 1 standard deviation above less than 1 standard deviation above less than 2 standard deviations below) the mean, which (is not, is) unusual. the best supporting actor was (less than 1 standard deviation below more than 1 standard deviation above more than 2 standard deviations below more than 1 standard deviation below) the mean, which (is is not) unusual.

Add the fractions, and simply the result to lowest terms. 2/3 + 2/7= ?