Consider the following hypothesis from a sample of 22 observations that has the value t 2.24:2.Haiu>8aWhat are the degrees of freedom for this statistic?b.Give the two critical values t* from t Distribution table that bracket t. Between what two values does the P-value of the test fall?c.Is the value t 2.24 statistically significant at the 5% level? Is it statistically significant atd.the 1% level?Use Stata to find the exact P-value. What is the exact Stata command you used to find theexact P-value? [Hint: ttail]e.

Since you have posted a question with multiple sub-parts, we will solve first three sub-parts for…

Answered: Consider the following hypothesis from…

MATLAB: An Introduction with Applications

6th Edition

ISBN:9781119256830

Author:Amos Gilat

Publisher:Amos Gilat

Chapter1: Starting With Matlab

Section: Chapter Questions

Problem 1P

See similar textbooks

Similar questions

a. Consider testing H0: μ=80. Under what conditions should you use the t-distribution to conduct the test? b. In what ways are the distributions of the z-statistic and t-test statistic alike? How do they differ?
Consider a random sample of size n from a normal distribution with unknown mean u and unknown variance o?. Suppose the sample mean is X and the sample variance is S?. n = 16, the observed sample mean ī is 8.9. the observed sample variance s? is 25 and 4o = 10.5. Suppose we now want to test Ho : o? = of versus H1 : o? + of. Which of these test statistics should we use? Select one: (n-1)s O a. W = of O b. Z= O c. T= Let of = 36. What is the (appropriate) observed test statistic? Give answer to three decimal places. Finally, we will compute a 99% confidence interval for o?. What is the lower endpoint of this 99% confidence interval? Give answer to three decimal places. What is the upper endpoint of this 99% confidence interval? Give answer to three decimal places.
A pit crew claims that its mean pit stop time (for 4 new tires and fuel) during an auto race is different than 13 seconds. A random sample of 40 pit stop times has a sample mean of 12.9 seconds and a population standard deviation of 0.3 second. Let α = 1%. a) The parameter of interest is ["", "", "", ""] population of pit crwe, propotion of pit crew in auto races, population mean pit stop time, population auto races b) The null hypothesis : is ["", "", "", ""] and the alternative hypothesis : c) The observed value is ["", "", "", ""] . d) The researcher can reject the null for < ["", "", "", ""] and > ["", "", "", ""] . e) type I error ["", "", "", ""] f) The probability of observing a value more extreme than already observed in the direction of the alternative is ["", "", "", ""] g) Result: ["", "", "", ""] A pit crew claims that its mean pit stop time (for 4 new tires and fuel) during an auto race is different…
A random sample of 15 families representing three different Scandinavian countries has been observed for the number of weekend trips they take per year. Are the differences significant (use p=.05, F(critical) = 3.88)? Use the five step model as a guide and write a sentence or two of interpretation for your results. Sweden Norway Denmark 10 11 7 9 10 5 4 5 2 2 2 0
A physician wants to test two blood glucose meters to see if there is any differences in measurements. To do this, he measures the glucose in blood samples taken from several randomly selected patients with both meters. Find the test statistic and degrees of freedom for an appropriate hypothesis test using the data set below. Let the difference d for each trial be computed as d=Meter B−Meter A. Assume that the measurements are normally distributed. Round the test statistic to three decimal places. Meter A (mg/dl) Meter B (mg/dl) 86.1 85.6 87.3 88 85.1 84.2 92.6 93.4 100.4 102.7 121.6 120.4 109.7 112.3 147.2 149.2 130.4 128.3 104.1 105.6 t=, df=
5.28 Variable life insurance return rates. Refer to the THEMENTE International Journal of Statistical Distributions (Vol. 1, 2015) P study of a variable life insurance policy, Exercise 4.97 (p. 239). SE HANDE Recall that a ratio (x) of the rates of return on the investment for C SE two consecutive years was shown to have a normal distribution, D PENZI NIMEREN MERC with = 1.5 and o= .2. Consider a random sample of 100 P WWW FESTE! variable life insurance policies and let represent the mean COME ratio for the sample. a. Find E(T) and interpret its value. b. Find Var(z). c. Describe the shape of the sampling distribution of . d. Find the z-score for the value = 1.52. e. Find P(x > 1.52). f. Would your answers to parts a-e change if the rates (x) of return on the investment for two consecutive years was not normally distributed? Explain.
We compute a sample correlation coefficient of r=0.692 from a set of 12 data pairs. We are testing Ho:p=0 against H;:p#0 at a = 0.05. The value of the test statistic for this test is: O 3.18 O 3.64 O 3.03 3.94
Consider a random sample of size n from a normal distribution with unknown mean u and unknown variance o?. Suppose the sample mean is X and the sample variance is S?. n = 16, the observed sample mean i is 8.9. the observed sample variance s? is 25 and 4o : 10.5. Suppose we now want to test Ho : o? = of versus H1 : o? + of. Which of these test statistics should we use? Select one: (n-1)s? W = of a. O b. Z %3D O c. T= S/n Let o = 36. What is the (appropriate) observed test statistic? Give answer to three decimal places. What is the p-value of the (appropriate) observed test statistic for testing Ho : o? = of versus H1 : o? + of you just computed? Give answer to three decimal places.
Use the t-distribution and the given sample results to complete the test of the given hypotheses. Assume the results come from random samples, and if the sample sizes are small, assume the underlying distributions are relatively normal. Test Ho : HA = Ha VS H. : HA # Hg using the fact that Group A has 8 cases with a mean of 125 and a standard deviation of 18 while Group B has 15 cases with a mean of 118 and a standard deviation of 14. (a) Give the test statistic and thep-value. Round your answer for the test statistic to two decimal places and your answer for the p- value to three decimal places. test statistic = p-value = eTextbook and Media (b) What is the conclusion of the test? Test at a 10% level. O Reject Ho. O Do not reject Ho. eTextbook and Media
Sam works at the JJ Electronics Factory. JJ produces the A23 electronic component. The length, X, of an A23, is normally distributed with a meanu = 10 centimeters and a standard deviation o = 0.53 centimeters. Sam randomly selects 20 A23 components from the production line for quality control purposes and measures their lengths. Let M be the sample mean length of the measured A23 components. Let S be the total length of the measured A23 components. (i.e. sum of the 20 lengths. a) What is the probability that X 10.5? .3085 c) What is the probability that all of the 20 measurements are less than 11? .0171 d) What is the expected value of S? 200 e) What is the standard deviation of S? 2.37 f) What is the probability that S-200 >2? 1.99 g) What is the standard deviation of S-200 2.37 h) What is the expected value of M? 10 i) What is the standard deviation of M? .1187 j) What is the probability that M >10.1? .199 k) What is the standard deviation of 9M? 1.068 1) If the probability of X >k…
Executives of a supermarket chain are interested in the amount of time that customers spend in the stores during shopping trips. The executives hire a statistical consultant and ask her to determine the mean shopping time, u, of customers at the supermarkets. The consultant will collect a random sample of shopping times at the supermarkets and use the mean of these shopping times to estimate u. Assuming that the standard deviation of the population of shopping times at the supermarkets is 27 minutes, what is the minimum sample size she must collect in order for her to be 99% confident that her estimate is within 5 minutes of u? Carry your intermediate computations to at least three decimal places. Write your answer as a whole number (and make sure that it is the minimum whole number that satisfies the requirements). (If necessary, consult a list of formulas.) ?
The following data give the weights (in pounds) lost by 15 members of a health club at the end of 2 months after joining the club. 4 24 11 18 12 4 11 13 12 16 7 4 7 16 14 a. Compute the values of the three quartiles and the interquartile range. Q1= Enter you answer; Q1 Q2= Enter you answer; Q2 Q3= Enter you answer; Q3 IQR= Enter you answer; IQR b. Calculate the approximate value of the 82nd percentile.Enter an exact value.Enter you answer in accordance to the item b) of the question statement c. Find the percentile rank of 14.Round your answer to the nearest integer.Enter you answer in accordance to the item c) of the question statement %

SEE MORE QUESTIONS

Recommended textbooks for you

MATLAB: An Introduction with Applications

Statistics

ISBN:

9781119256830

Author:

Amos Gilat

Publisher:

John Wiley & Sons Inc

Probability and Statistics for Engineering and th…

Statistics

ISBN:

9781305251809

Author:

Jay L. Devore

Publisher:

Cengage Learning

Statistics for The Behavioral Sciences (MindTap C…

Statistics

ISBN:

9781305504912

Author:

Frederick J Gravetter, Larry B. Wallnau

Publisher:

Cengage Learning

MATLAB: An Introduction with Applications

Statistics

ISBN:

9781119256830

Author:

Amos Gilat

Publisher:

John Wiley & Sons Inc

Probability and Statistics for Engineering and th…

Statistics

ISBN:

9781305251809

Author:

Jay L. Devore

Publisher:

Cengage Learning

Statistics for The Behavioral Sciences (MindTap C…

Statistics

ISBN:

9781305504912

Author:

Frederick J Gravetter, Larry B. Wallnau

Publisher:

Cengage Learning

Elementary Statistics: Picturing the World (7th E…

Statistics

ISBN:

9780134683416

Author:

Ron Larson, Betsy Farber

Publisher:

PEARSON

The Basic Practice of Statistics

Statistics

ISBN:

9781319042578

Author:

David S. Moore, William I. Notz, Michael A. Fligner

Publisher:

W. H. Freeman

Introduction to the Practice of Statistics

Statistics

ISBN:

9781319013387

Author:

David S. Moore, George P. McCabe, Bruce A. Craig

Publisher:

W. H. Freeman

SEE MORE TEXTBOOKS