Amber is an archeologist and is trying to date some furniture that was made of wood. Other experts put the date of the site at 1119 ce, but she thinks it is much earlier than that and wishes to perform her test a an alpha level of 0.01. Consider the following Conclusion and Confidence Interval statement: Conclusion: Amber collected sufficient evidence to reject the claim that the true proportion is 1119 and conclude that the true population proportion is greater than 1119. There are several issues with this statement. Select the problems applicable here:
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- According to a University Center for Logistics Management, 8% of all merchandise sold in the United States gets returned. Seattle department store sampled 88 items sold in January and found that 8 of the items were returned. If you have the following null and alternative hypotheses for a test you are running: Ho:p = 0.08 Ha:p < 0.08 Calculate the test statistic, rounded to 3 decimal places. Submit Question Ce %23 24 % 4. 7 80 e r u SI d b. 60 65A 95% confidence interval for the mean body mass index (BMI) of young American women is 26.8±0.626.8±0.6. One of your classmates interprets this interval in the following way: “The mean BMI of young American women cannot be 28.” Is your classmate’s interpretation correct? If not, what is the correct interpretation of the confidence interval? Incorrect. We are 95% confident that future samples of young women will have mean BMI between 26.2 and 27.4. Incorrect. We are 95% confident that the interval from 26.2 and 27.4 captures the BMI of all young American women. Correct. The interval states that the mean BMI of young American women is between 26.2 and 27.4, so the mean cannot be 28. Incorrect. We are 95% confident that the interval from 26.2 and 27.4 captures the true mean BMI of all young American women. Incorrect. If we take many samples, the population mean BMI will be between 26.2 and 27.4 in about 95% of those samples.Next Question Assume a significance level of a = 0.05 and use the given information to cd d (b) below. Original claim: More than 43% of adults would erase all of their personal information online if they could. The hypothesis test results in a P-value of 0.0443. ..... a. State a conclusion about the null hypothesis. (Reject Ho or fail to reject Ho.) Choose the correct answer below. A. Fail to reject Ho because the P-value is greater than x. B. Reject H, because the P-value is less than or equal to a. C. Fail to reject H, because the P-value is less than or equal to a. O D. Reject Ho because the P-value is greater than a. b. Without using technical terms, state a final conclusion that addresses the original claim. Which of the following is the correct conclusion? A. There is sufficient evidence to support the claim that the percentage of adults that would erase all of their personal information online if they could is more than 43%. B. There is not sufficient evidence to support the…
- ssume that your sample(s) comes from a normally distributed population. Please show all work. State the null hypothesis and alternative hypothesis. State your decision in terms of the null hypothesis and the alpha level. State your results in standard APA format. What, if any relationship, exists between self-reported height for females and self-reported weight for the same female participants? Write a null and an alternative hypothesis for this research question (you may want to review Example 15.7 and Example 15.8 on page 508). Determine the relationship between the two measures for this sample (calculate r). Discuss and interpret the relation strength and direction indicated by this statistic. Test your hypothesis. Report your decision. Then, report your results using standard APA format (see page 509 in your text). Please only solve the last 3 bulletsA study shows that the 90% confidence interval of the mean butterfly wing area (cm2 ) is 32.81 ± 1.71. The sample size of the study is 20. Which of the following is the correct interpretation for this confidence interval? A. 90% of population means will fall between 31.1 and 34.52 cm2 . B. There is a 95% probability that a butterfly selected from the sample has a wing area between 31.1 and 34.52 cm2 . C. If we take many, many additional random samples of size 20, and from each computed a 90% confidence interval for µ, approximately 90% of these intervals would contain µ. If our confidence interval is one of these 90% intervals, then our estimate that µ lies between 31.1 and 34.52 cm2 will be correct. D. Both A and C.Multiparty problem....need help on last two problems g and h.
- A random sample of size 49 from normal population yields, mean = 7.4 and standard deviation = 5.4. The lower bound of a 99 percent confidence interval for population mean is O a. 6.11 O b. 5.33 O c. 5.85 O d. 6.40 For the following hypothesis test: HO: ma 26 HA: m < 26 a: 0.025 with n = 50, a 16, and 43, which of the following is TRUE? Select one: O a. reject null hypothesis and conclude that the mean is less than 26 O b. fail to reject null hypothesis and conclude that the mean is equal to or greater than 26 O c. reject null hypothesis and conclude that the mean is equal to or greater than 26 O d. fail to reject null hypothesis and conclude that the is less than 26(e) The means of all three data sets are to be compared by ANOVA. State the null hypothesis. Determine whether the means differ at the 95% confidence level.Please answer questions a,b & c. Thank you!
- Suppose that you are testing the following hypotheses: Ho: p = .80 and Ha: p # .80. You calculate a test statistic value of z = -6.08. True or False: At a 95% confidence level, which is alpha = .05, you should reject the null hypothesis. True FalseA sample of 23 plants was taken and the mean height was 27 cm. A 95% confidence interval for the true mean height of plants of that particular species is (23.2 cm, 30.8 cm). Four students gave the following interpretations of the confidence interval. Which of the following is correct? 1. We are 95% confident that the true mean height is 27 cm since that value lies in the confidence interval 2. We can be fairly confident that 95% of all plants of that species have a height between 23.2 cm and 30.8 cm. 3. The probability is 0.95 that the mean height lies in the interval (23.2 , 30.8). 4. We are 95% confident that the true mean height for all plants of that species will lie in the interval (23.2, 30.8)Identify the type I error and the type II error that corresponds to the given hypothesis. The proportion of people who write with their left hand is equal to 0.17. Which of the following is a type I error? A. Fail to reject the claim that the proportion of people who write with their left hand is 0.17 when the proportion is actually 0.17. B. Reject the claim that the proportion of people who write with their left hand is 0.17 when the proportion is actually 0.17. C. Reject the claim that the proportion of people who write with their left hand is 0.17 when the proportion is actually different from 0.17. D. Fail to reject the claim that the proportion of people who write with their left hand is 0.17 when the proportion is actually different from 0.17. Which of the following is a type II error? A. Reject the claim that the proportion of people who write with their left hand is 0.17 when the proportion is actually 0.17. B. Reject the claim that the proportion of people who write with their…

