Which of the following is correct about sample size? a. A sample size of 1,000 has the optimal balance of externalvalidity and statistical accuracy. b. A large sample size still needs to be a random sample in order to be generalizable. c.A sample size of 1,000 allows for the most statistically accurate conclusions. d. A large sample size is morerepresentative of the population than a small

Which of the following is correct about sample size.. a. A sample size of 1,000 has the optimal…

Answered: Which of the following is correct about…

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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14.) Using a sample to compute a __________ as a proxy for a parameter is generally called point estimation and is a form of statistical inference.
Simple Random Sampling
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In the independent measures t-test, what is assumed by the homogeneity of variance assumption? a. The two samples have equal variances. b. The two sample variances are not equal. c. The two populations have equal variances. d. The two population variances are not equal.
In a two-sample test of means for independent samples, the equal sign always appears in a. null hypothesis b. alternate hypothesis c. the upper tail of the test statistic d. the lower tail of the test statistic
Which of the following decrease(s) power in hypothesis testing? A. Increasing the sample size. B. Decreasing αα level. C. Increasing the population variance. D. Increasing the difference in the means of the two conditions in an independent-samples design. E. A and D F. B and C G. B and D H. C and D
The symbol x¯ represents the population mean of all possible sample means of size n. False True
Test whether , P2 at the a=0.02 level of significance for the sample data shown in the accompanying table. Assume that the populations are normally distrboted. Click the icon to view the data table. Determine the null and alternative hypothesis for this test - X Sample data OA Ho OR H, Population 1 Population 2 H, 32 25 100 4 114.5 OC H H, COD. H 122 133 Print Done Detemine the Pvalue for this hypothesis test P=(Round to three decimal places as needed) State the appropriate conclusion, Choose the corred answer below O A. Reject H, There is not suficient evidence at the a0 02 level of signiticance to conclude that H, OB. Do not reject H, There is sufficient evidence at the a0.02 level of significance to conclude that , O C. Do not reject Ho There is not sufficient evidence at the a 0.02 level of signiticance to conclude that OD. Reject Ho There is suficient evidence at the 0.02 level of significance to conclude that p,
Samples of airline departure times are obtained and compared to the scheduled departure times. Six major airlines are compared and their mean delay times are recorded. Identify the null and alternative hypotheses for applying an analysis of variance. Choose the correct answer below. OA. Ho: H₁ H₂ H3 H4 H5 H6 H₂: At least two of the means are equal. O B. Ho: At least one of the means is different from the others. Ha: H1 H2 H3 H4 H5=H6 OC. Ho: At least two of the means are equal. Ha: H1 H₂ H3 H4 H5 H6 O D. Ho: H₁ Ha: H1 O E. Ho: H₁ Ha: H1 OF. Ho: H₁ H₂ H3 H4 H5=H6 H₂ H3 H4 H5 H6 H₂ H3 H4 H5 H6 H2 H3 H4 H5=H6 H₂ H3 H4 H5=H6 Ha: At least one of the means is different from the others.
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Provide an appropriate response. 1) A local supermarket claims that the waiting time for its customers to be served is the lowest in the area. A competitor's supermarket checks the waiting times at both supermarkets. The sample statistics are listed below. Test the local supermarket's hypothesis. Use a = 0.05. Local Supermarket n1 = 15 Competitor Supermarket n2 = 16 x2 = 5.6 minutes s2 = 1.0 minutes x1 = 5.3 minutes s1 = 1.1 minutes
A state-by-state survey found that the proportions of adults who are smokers in state A and state B were 22.9% and 19.3%, respectively. (Suppose the number of respondents from each state was 3000.) At a = 0.05, can you support the claim that the proportion of adults who are smokers is lower in state A than in state B? Assume the random samples are independent. Complete parts (a) through (e). (a) Identify the claim and state Ho and Ha. The claim is "the proportion of adults who are smokers in state A is the proportion of adults who are smokers in state B." Let p, and p2 be the two population proportions. State H, and Ha. Choose the correct answer below. O A. Ho: P1 = P2 Hạ: P1 # P2 O B. Ho: P1 P2 Ha: P1 SP2 D. Ho: P1 sP2 F. Ho: P1 2 P2 Ha: P1 > P2 Ha: P1 1.96 ОС. z2 -1.64 D. z 1.64 E. z - 1.96 (c) Find the standardized test statistic.

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