Math

StatisticsQ&A LibraryA survey conducted by the American Automobile Association showed that a family of four spends an averageof $215.60 per day while on vacation. Suppose a sample of 64 families of four vacationing at Niagara Fallsresulted in a sample mean of $252.45 per day and a sample standard deviation of $73.50.a. Develop a 95% confidence interval estimate of the mean amount spent per day by a family of four visitingNiagara Falls (to 2 decimals)b. Based on the confidence interval from part (a), does it appear that the population mean amount spent perday by families visiting Niagara Falls differs from the mean reported by the American Automobile Association?SelectQuestion

Asked Nov 16, 2019

5 views

Step 1

**a,**

**Calculation of confidence interval:**

Here, the sample mean, *x*-bar is $252.45.

Population mean, *µ* is 215.60.

Population standard deviation, *s* = $73.50.

Sample size, *n* is 64.

The 95% confidenc...

Tagged in

Find answers to questions asked by student like you

Show more Q&A

Q: Every cereal box has a gift inside, but you cannot tell from the outside what the gift is. The store...

A: The probability that both of the boxes will have the secret décor ring is given below:

Q: The Centers for Disease Control reported the percentage of people 18 years of age and older who smok...

A: It is given that margin of error (E) is 0.02 and the confidence level is 95%.Here,

Q: How do they get that number from the t table if 1000-1=999 how do they figure 999 and the.025% my t ...

A: It is given that the sample size is 1,000. Since the sample size is large, from your given table, i...

Q: what is the difference between z* and z-score?

A: z* is called the z-critical value. We calculate the z-critical value or z* from the standard normal ...

Q: 15L

A: Introduction:Suppose x1, x2, …, xn are n observations on a particular characteristic. Then, the aver...

Q: Let Z be a standard normal random variable. Use the calculator provided, or this table, to determine...

A: The Z score is the distance from mean of a data point in temrs of standard deviation.P(-0.99 ≤ Z ≤ 0...

Q: 3. A psychologist theorized that people could hear better when they have just eaten a large meal. Si...

A: Two sample t-test:Two sample t-test is used to test the difference between two population means. A c...

Q: The university is trying to estimate the percentage of students who failed more than two courses. In...

A: Step-by-step procedure to obtain the value of using STATKEY:Choose Normal under Theoretical Distrib...

Q: A statistics instructor believes that fewer than 20% of Evergreen Valley College (EVC) students atte...

A: Introduction:Denote p̂ as the true proportion of the college students who attended the opening night...