Complete parts (a) through (d) for the sampling distribution of the sample mean shown in the accompanying graph.Click the icon to view the graph.Sampling distribution(a) What is the value of u?The value of pu, is 400b What is the value of o?The value of o, is 40(c) If the sample size is n=9, what is likely true about the shape of the population?A The shape of the population is skewed right.1.OB. The shape of the population is skewed left.360 400 440c. The shape of the population is approximately normal.The distribution is normal. The locations ofthe peak and inflection points are shown.OD The shape of the population cannot be determined.d If the sample size is n= 9, what is the standard deviation of the population from which the sample was drawn?The standard deviation of the population from which the sample was drawn isDama

Answered: C. The shape of the population is…

MATLAB: An Introduction with Applications

6th Edition

ISBN:9781119256830

Author:Amos Gilat

Publisher:Amos Gilat

Chapter1: Starting With Matlab

Section: Chapter Questions

Problem 1P

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The distribution is used when the population distribution is normal and Select one: O a. Both a and b are correct. O b. When the sample size is more than 30. O c. When sample size is less than 30 and the population standard deviation is not known. O d. The population standard deviation is also known.
Exhibit 11-3 The contents of a sample of 26 cans of apple juice showed a standard deviation of 0.06 ounce. We are interested in testing to determine whether the variance of the population is significantly more than .003. Refer to Exhibit 11-3. The p-value for this test is a) .05 b) greater than .10 c) less than .10 d) 1.96
An insurance company is looking over accident statistics. They want to model the population of all drivers for the population parameter of the standard deviation and variance of the age of the driver involved in an automobile accident. They have a sample of 100 accidents from around the country. The age of the driver in each of these accidents is provided below. Use Excel to calculate the sample standard deviation and the sample variance. Round your answers to one decimal place. Do not round until you've calculated your final answer "Age of people in accident"48643346436728189044472440202747683248472248217347302918487364454920205066654187873417203176493089672222455023481746382942254720463119214227226621236675744621461969202048238851284918204522313823284939 Standard deviation: Variance:
Question Help ▼ nual earnings of 12 randomly selected computer software engineers have a sample standard deviation of $3655. Assume the sample is from a normally distributed population. Construct a confidence interval for the population variance o and the ation standard deviation o. Use a 95% level of confidence. Interpret the results. is the confidence interval for the population variance o ? ) (Round to the nearest integer as needed.) erpret the results. Select the correct choice below and fill in the answer box(es) to complete your choice. ound to the nearest integer as needed.) O A. With 5% confidence, you can say that the population variance is between O B. With 95% confidence, you can say that the popúlation variance is between and and OC. With 95% confidence, you can say that the population variance is greater than O D. With 5% confidence, you can say that the population variance is less than What is the confidence interval for the population standard deviation o? ( ) (Round to…
A population of N = 5 scores has a mean of u = 20 and a standard deviation of o = 4. Which of the following is the correct Interpretation of the standard deviation? O The average distance of scores from the mean of p- 20 is 5 points. O The average distance of scores from the mean of u = 20 is 1 point. The average distance of scores from the mean of u = 20 is 4 points. O The average squared distance of scores from the mean of u = 20 is 4 points.
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Which of the statements below is true about the standard error of the sampling distribution of the sample mean. It measures the variabilty of the mean from sample to sample. It is less than the standard deviation of the population. All of the above. It decreases as the sample size increases.
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4000 B.C. A.D. 150 A study was done on skull sizes of humans during different time periods. The results are shown in the table. Assume that the two samples are independent simple random samples selected from normally distributed populations, and do not assume that the population standard deviations are equal. Complete parts (a) and (b) below. H2 27 27 131.05 mm 133.94 mm S 5.18 mm 5.27 mm a. Use a 0.05 significance level to test the claim that the mean skull breadth in 4000 B.C is less than the mean skull breadth in A.D 150. What are the null and alternative hypotheses? O B. Ho: H1 =H2 O A. Ho: H1 =H2 H:H1> H2 OC. Ho: H1 = H2 H1: H1 # H2 O D. Ho: H1 # H2 H: H1

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C. The shape of the population is approximately normal. O D. The shape of the population cannot be determined. (d) If the sample size is n=9, what is the standard deviation of the population from which the sample was drawn? The standard deviation of the population from which the sample was drawn is