Statistical abstracts 117th edition reports that the

Assignment Help Basic Statistics

Reference no: EM13618224

Statistical Abstracts (117th edition) reports that the average amount spent annually for food by householders under 25 years of age is $2,690. A random sample of 16 people under 25 years of age who live in a university neighborhood were surveyed. The survey showed that they spent a sample mean $3,220 with sample standard deviation $750. Test the claim that the mean for this neighborhood is greater than the national average. Use a 5% significance level. .

(a) State the null and alternate hypotheses.

(b) Would you perform a left-tailed, right-tailed, or two-tailed test? Why?

c) Would you use a t critical value or a z critical value? Why?

(d) What is the critical value?

(e) Compute the test statistic.

(f) Sketch the normal curve indicating the positions of the critical value, critical region, and test statistic.

(g) Would you reject or fail to reject the null hypothesis?

(h) Interpret your conclusion in the context of this problem.

Reference no: EM13618224

Questions Cloud

Determine the smallest integer number of trunk lines needed : messages are transmitted from low speed terminals and arrive at a message concentrator at a poisson rate of 600hr. they

The amounts a soft drink machiene is designed to dispense : the amounts a soft drink machiene is designed to dispense for each drink are normally distributed with a mean of 12.2

In 2010 91 of households had at least one cell phone a : in 2010 91 of households had at least one cell phone. a random sample of 300 households in each of two different

Assume you have applied for two jobs a and b the : assume you have applied for two jobs a and b. the probablility that you get job a is .13. the probability of being

Statistical abstracts 117th edition reports that the : statistical abstracts 117th edition reports that the average amount spent annually for food by householders under 25

Suppose you calculate a 99 confidence interval of 1422 to : suppose you calculate a 99 confidence interval of 14.22 to 21.23. determine the margin of

The waiting time in minutes between ordering and receiving : the waiting time in minutes between ordering and receiving your meal at a certain restaurant is exponentially

The volume of a soda dispensing machine pours into a : 1 the volume of a soda dispensing machine pours into a 12-ounce can of soda follows a normal distribution with a mean

You want to compare years of schooling among american : you want to compare years of schooling among american adults who describe their political veiwpoint as liberal moderate

User Account

All Pages