"Trydint" bubble-gum company claims that 3 out of 10 people prefer their gum to "Eklypse". Test their claim at the 90 confidence level. The null and alternative hypothesis in symbols would be H0:p=0.3 H1:p≠0.3 The null hypothesis in words would be: The proportion of all people that prefer Trydint gum is 0. Based on a sample of 100 people, 25 said they prefer "Trydint" gum to "Eklypse". The point estimate is:  0.250 The 90 % confidence interval is:  to  (to 3 decimals) Based on this we: Reject the null hypothesis Fail to reject the null hypothesis

A poll reported that only 1316 out of a total of 1746 adults in a particular region said they had a​ "great deal of​ confidence" or​ "quite a lot of​ confidence" in the military. Assume the conditions for using the CLT are met. Complete part​ (a)  (a) Find a 95​% confidence interval for the proportion that express a great deal of confidence or quite a lot of confidence in the​ military, and interpret this interval. The 95​% confidence interval for the proportion that express a great deal of confidence or quite a lot of confidence in the military is: (  ? ,  ? )

In a survey of 508 adults, 317 indicated that emails can be easily misinterpreted. If we wish to construct a 95% confidence interval to estimate the true proportion of adults who believe that emails can be easily misinterpreted we would substitute a. P hat is equal to  b. Z is equal to

A survey of 240 teachers found that two-thirds of those surveyed do not live in Sydney. Can you conclude statistically that the population proportion who do not live in Sydney is less than ​0.75? Use a​ 95% confidence interval. What is the confidence interval and is 0.75 within the interval?