You are conducting a study to see if the probability of a true negative on a test for a certain cancer is significantly more than 0.86. You use a significance level of = 0.01. a =
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A: Confidence interval is derived from the Sample stastics for the estimatation of population…
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A:
Q: If the estimated power of a significance test is 0.6, it means that
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A: mu = 24 n = 30
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A: Levene's test is an inferential measure used in statistics to determine the equality of variances…
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A: There are mainly two important things in any research. Practical significance and statistical…
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A: Given that Population mean μ =4.7 Null and alternative hypothesis is denoted by H0 and H1.
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A: How do you illustrate a normal random variable?
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A: We have given that If we increase the significance level α for a test from 0.05 to 0.1, we will…
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A: Here we have paired data so paired t test will be used.
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A: Given Information: Men: Sample size n1=60 Sample proportion p^1=0.45 Women: Sample size n2=40 Sample…
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A: Claim : The mean GPA of night students is larger than 2.8 Sample size n = 35 Sample mean M = 2.81…
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A: We have given that a statement related to null hypothesis in case of F test.
Q: Explain the tests of statistical significance?
A: It is asked to explain the tests of statistical significance.
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A: In this case, we need to identify the given statement is true or not.
Q: At the a Y 0.05 significance level, what is the most appropriate conclusion to draw from this test?
A: To make decisions about hypothesis, we make comparison of p-value and level of significance.
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A: Statistical significance: It consider that the observed results are unlikely under the assumption…
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A: The value of z score tells that how many standard deviations the data is spread away from mean. The…
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A: Meaning of statistically significant:In statistical analysis, the word “significance” essentially…
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A: It is an important part of statistics. It is widely used.
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A: See the handwritten solution
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A: Given : p = 0.42 n = 2400
Q: What is statistical significance?
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A: Statistical significance: In the study, when the result obtained is very unlikely to occur just by…
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A: Type I error:Probability of rejecting the null hypothesis when it is actually true.
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A: Solution:
Q: When do you consider a person to be statistically literate?
A: From the given information we find solution
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A: Statistical significance: If the chance of occurrence of an event is less than or equal to 5% then…
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- An ice-cream manufacturer asked you to determine if a person's choice of ice-cream flavour is dependent on age variability. To do this, you conduct a Chi-square hypothesis test with a calculated test statistic of 12.1812 and a critical value of 15.057 at a 5% significance level. Using the information provided, how would you advise the ice-cream manufacturer? Choosen one: A. Reject the null hypothesis, ice-cream choice does not depend on age variability. B. Do not reject the null hypothesis, ice-cream choice depends on age variability. C. Reject the null hypothesis, ice-cream choice depends on age variability. D. Do not reject the null hypothesis, ice-cream choice does not depend on age variabilityBased on information from a large insurance company, 67% of all damage liability claims are made by single people under the age of 25. A random sample of 53 claims showed that 42 were made by single people under the age of 25. Does this indicate that the insurance claims of single people under the age of 25 is higher than the national percent reported by the large insurance company? Give the test statistic and your conclusion. a) z = 1.896; reject Ho at the 5% significance level b) z = -1.896; reject Ho at the 5% significance level c) z = 1.896; fail to reject Ho at the 5% significance level d) z = -1.396; fail to reject Ho at the 5% significance level e) z = 1.396; reject Ho at the 5% significance levelA random sample of 170 donations at a certain blood bank reveals that 84 were Type A blood. Does this suggest that the actual percentage of Type A donations differs from 45%, of the population having Type A blood? A. State H0 and Ha B. Test the hypothesis using the P-Value approach at a significance level of 3%, and express your decision. C Based on the given data, determine the extreme value without rejecting the H0.
- For a sample of 400 correctional officers at Lucasville State Prison, a researcher believes there is a relationship between “years on the job” and “willingness to help raise money for adult charities.” Using the following data, test the null hypothesis at the .01 level of significance that willingness to help raise donations does not differ by length of service as a correctional officer. In so doing, identify: (1) the research and null hypothesis, (2) the critical value needed to reject the null, (3) the decision that you made upon analyzing the data, and (4) the conclusion you have drawn based on the decision you have made.The NAEP considers that a national average of 283 is an acceptable performance. Using α = .05, run a two-tail t-test for one sample to test Ho: µ=283 for the 2019 scores. Report the t-obt, df, and p-values. Would you reject the null hypothesis that the 2019 scores come from a population with average 283? If this is the case, does it come from a population from larger or smaller average?Is the proportion of wildfires caused by humans in the south different from the proportion of wildfires caused by humans in the west? 394 of the 533 randomly selected wildfires looked at in the south were caused by humans while 388 of the 554 randomly selected wildfires looked at the west were caused by humans. What can be concluded at the = 0.01 level of significance? For this study, we should use Select an answer z-test for the difference between two population proportions t-test for the difference between two dependent population means z-test for a population proportion t-test for the difference between two independent population means t-test for a population mean The null and alternative hypotheses would be: Select an answer p1 μ1 Select an answer > ≠ < = Select an answer μ2 p2 (please enter a decimal) Select an answer p1 μ1 Select an answer > = < ≠ Select an answer p2 μ2 (Please enter a decimal) The test statistic ? z t = (please show your…
- A medical researcher conducts a hypothesis test to test the claim that U.S. adult males have gained weight over the past 15 years. Assume that all the conditions for proceeding with a one-sample test on proportions have been met. The calculated test statistic is approximately 1.71 with an associated p-value of approximately 0.0436. Choose the conclusion that provides the best interpretation for the p-value at a significance level of a=0.05in a Gallup poll of 1003 randomly selected subjects, 370 said they have a gun in their home. The accompanying Minitab display shows the results from a test at the 0.05 significance level of the claim that 40% of homes have guns in them. b. Explain the meaning of the z-statistic in the context of the problem.A humane society claims that less than 71% of households in a certain country own a pet. In a random sample of 400 households in that country, 276 say they own a pet. At alpha = 0.01, is there enough evidence to support the society's claim? What is the standardized test statistic z? What is the p-value? Do you reject or fail to reject the null hypothesis? Why? How do you enter this problem into a ti84 calculator?
- Independent random samples of 32 people living on the west side of a city and 30 people living on the east side of a city were taken to determine if the income levels of west side residents are significantly different from the income levels of east side residents. Given the testing statistics below, determine if the data provides sufficient evidence to conclude that the income levels of west side residents are significantly different from the income levels of east side residents, at the 2% significance level. H0:μw=μeHa:μw≠μe t0=2.364 t0.01=±2.099 Select the correct answer below: No; the test statistic is not between the critical values. No; the test statistic is between the critical values. Yes; the test statistic is not between the critical values. Yes; the test statistic is between the critical values.According to a recent poll, the percentage of Americans who would vote for the incumbent president is 53%. If a random sample of 100 people in New York results in 45% who would vote for the incumbent, test the claim that the percentage of people in New York who would vote for the incumbent president is different from 53%. Use the following results and a 0.10 significance level to state your decision about H0. H0 : p=0.53 H1 : p≠0.53 test statistic: z = -1.6 p value = 0.1090A study of color in tiger beetles is conducted to support the contention that the proportion of black beetles may vary from locality to locality (alpha=0.05). A sample of 500 beetles caught in one season near Providence, Rhode Island, yielded 95 black beetles. A catch of 112 beetles from Aqueduct, New York, contained 17 black individuals. 1. What is null and alternative hypothesis? 2. What proportions did you observe in the two localities? 3. What is the null standard error for the difference? 4. Calculate the appropriate test statistic. 5. What p-value do you associate with that statistic? 6. What do you conclude about the proportion of black beetles in the two locations?