# Question: According to a study done by the Gallup organization the

According to a study done by the Gallup organization, the proportion of Americans who are satisﬁed with the way things are going in their lives is 0.82.

(b) In the sample obtained in part (a), what is the probability the proportion who are satisﬁed with the way things are going in their life exceeds 0.85?

(c) Would it be unusual for a survey of 100 Americans to reveal that 75 or fewer are satisﬁed with the way things are going in their life? Why?

(b) In the sample obtained in part (a), what is the probability the proportion who are satisﬁed with the way things are going in their life exceeds 0.85?

(c) Would it be unusual for a survey of 100 Americans to reveal that 75 or fewer are satisﬁed with the way things are going in their life? Why?

## Answer to relevant Questions

According to a study done by the Pew Research Center, 39% of adult Americans believe that marriage is now obsolete. (b) What is the probability that in a random sample of 500 adult Americans less than 38% believe that ...sample proportion of adults who respond yes, is approximately normal, how many more adult Americans does the researcher need to sample if (a) 10% of all adult Americans support the changes? (b) 20% of all adult Americans ...A simple random sample of size n is drawn from a population. The sample mean, x̄, is 54.8 and the sample standard deviation is10.5. (a) Construct the 90% conﬁdence interval for the population mean if the sample size, n, ...Find the critical t-value for constructing a conﬁdence interval about a population mean at the given level of conﬁdence for the given sample size,n. (a) 96% conﬁdence; n = 26 (b) 98% conﬁdence; n = 18 Determine the point estimate of the population proportion, the margin of error for each conﬁdence interval, and the number of individuals in the sample with the speciﬁed characteristic, x, for the sample size ...Post your question