Which is a negatively skewed distribution?
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Q: n average, a banana will last 6.8 days from the time it is purchased in the store to the time it is…
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Q: On average, a banana will last 6.8 days from the time it is purchased in the store to the time it is…
A: 1. Assume that μ is the population mean time to spoil if the banana is hung from the ceiling.
Which is a negatively skewed distribution?
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- A construction company that installs drywall wanted to investigate how a person’s age affects how much dry wall they can install in a week. On one hand, it would seem that the younger workers would be able to install more, but it seems that experience would also play a role. Two random samples were taken. Assume the distributions are normal.Dry Wall Results by Age Age 18-21(sheets/week) Age 25-28(sheets/week) 92 104 109 116 93 96 81 104 115 108 109 108 84 116 121 112 94 120 116 108 a) Set up the null and alternative hypotheses to see if there is a difference in the average number of sheets of dry wall that a person can install per week based on age. b) Check the conditions. c) Calculate the test statistic. d) Find the p-value. e) Using α = 0.05, state your conclusion in the context of the problem.You are given the following parameters/numerical descriptions for a distribution: mean = 51, median = 51, standard deviation = 13, and coefficient of variation = 0.26. Which of the following is true about the distribution? a. This distribution is uniform. b. This distribution is right-skewed. c. This distribution is symmetric. d. This distribution is left-skewed. e. None of theseIndicate whether the five number summary corresponds most likely to a distribution that is skewed to the left, right or symmetric (100, 110, 115, 160, 220)
- On average, a banana will last 6.6 days from the time it is purchased in the store to the time it is too rotten to eat. Is the mean time to spoil different if the banana is hung from the ceiling? The data show results of an experiment with 14 bananas that are hung from the ceiling. Assume that that distribution of the population is normal. 7.9, 6, 5.5, 8.1, 7.9, 8.8, 6.6, 8.7, 6.2, 6.3, 8.6, 6.7, 8.5, 9.3 What can be concluded at the the α = 0.01 level of significance level of significance? a. For this study, we should use [t-test for a population mean b. The alternative hypothesis would be: H₁: Hv c. The test statistic d. Based on this, we should Select an answer e. Thus, the final conclusion is that ... Select an answer (please show your answer to 3 decimal places.) the null hypothesis.Two hundred patients with symptoms of asthma have received some treatment. the table below presents the distribution of self-reported reduction of the symptoms after receiving the treatments. The researcher wants to know whether the distribution after receiving treatments follows the hypothesized distribution, ie, 7.5% much worse, 22.5% worse, 40% no change, 22.5 better, and 7.5% much better (keep 2 decimal points) observation distribution of change in symptoms after receiving treatments Total Much worse Worse. No change. Better. Much Better 200. 22. 42. 77. 40. 19 a. The expected frequencies for much worse, worse, no change, better, and much better are____,___,____,___, and ____, respectively b. The calculated x^2 values for these changes in symptoms are___,___,___,___,___ c. The degree of freedom for this analysis is ____, and the critical x^2 at a=0.05 level is _____ d. If A= reject the null hypothesis that the distribution of change in symptoms after receiving treatments is…A college football coach was interested in whether the college's strength development class increased his players' maximum lift (in pounds) on the bench press exercise. He asked four of his players to participate in a study. The amount of weight they could each lift was recorded before they took the strength development class. After completing the class, the amount of weight they could each lift was again measured. What is being tested in this situation and what distribution will be used to conduct the test? Group of answer choices a.Two independent means, normal distribution. b.Single population mean, use the t-distribution. c.Single population mean, use the normal distribution. d.Two independent proportions, use the normal distribution. e.Two independent means, use the Student’s-t distribution.
- After conducting a literacy test on inmates, the evaluator realizes that the test was much more difficult than expected. The shape of the distribution would be? (normal, positively skewed, negatively skewed, or bell-shaped?) How do I recognize which one it is?A researcher asks a sample of people about their attitudes toward marijuana legalization and concludes people have a wide variety of opinions, and are equally likely to be anywhere between strongly in favor of it to strongly opposed to it. She reaches this conclusion because the shape of the distribution isAn amusement park keeps track of the percentage of individuals with season passes according to age category. An independent tourist company would like to show that this distribution of age category for individuals buying season passes is different from what the amusement park claims. The tourist company randomly sampled 200 individuals entering the park with a season pass and recorded the number of individuals within each age category. Age Category Child (under 13 years old) Teen (13 to 19 years old) Adult (20 to 55 years old) Senior (56 years old and over) Number of Individuals 56 86 44 14 The tourist company will use the data to test the amusement park’s claim, which is reflected in the following null hypothesis. H0:pchild=0.23H0:pchild=0.23, pteen=0.45pteen=0.45, padult=0.20padult=0.20, and psenior=0.12psenior=0.12. What inference procedure will the company use to investigate whether or not the distribution of age category for individuals with season passes is…
- Identify and sketch three distribution shapes that are symmetric.On average, a banana will last 6.1 days from the time it is purchased in the store to the time it is too rotten to eat. Is the mean time to spoil greater if the banana is hung from the ceiling? The data show results of an experiment with 13 bananas that are hung from the ceiling. Assume that that distribution of the population is normal. 7.4, 7.5, 7.9, 5.7, 5.9, 8.1, 4.8, 8.7, 6.8, 5.9, 8.2, 5.1, 5.1 What can be concluded at the the αα = 0.10 level of significance level of significance? For this study, we should use Correct The alternative hypothesis would be: H1:H1: Correct Correct Correct The test statistic Correct = (please show your answer to 3 decimal places.) Based on this, we should Correct the null hypothesis. Thus, the final conclusion is that ...On average, a banana will last 6.1 days from the time it is purchased in the store to the time it is too rotten to eat. Is the mean time to spoil greater if the banana is hung from the ceiling? The data show results of an experiment with 12 bananas that are hung from the ceiling. Assume that that distribution of the population is normal. 5.5, 6.6, 5.1, 8.4, 7.1, 5.1, 4.8, 5.1, 8.1, 5.4, 7, 7.8 What can be concluded at the the a = 0.05 level of significance level of significance? a. For this study, we should use Select an answer b. The null and alternative hypotheses would be: Ho: ? Select an answer ✓ H₁: ? Select an answer ✓ 4 c. The test statistic?v= (please show your answer to 3 decimal places.) (Please show your answer to 4 decimal places.) d. The p-value =
