Solve each of the following problems completely. Show all your solutions. 1. Given a standard normal distribution, find the value of k such that a) P(Z> k) = 0.2946 %3D b) P(Z< k) = 0.0427 %3D c) P(-0.93
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- Why might the range not be the best estimate of variablitiy?Describe about Tukey’s HSD Test.In the past lessons, you have collected real data set to be described using statistical values. Using the same or similar data set, formulate a problem which you will solve using the normal curve concepts. Discuss your procedure with your classmates.
- Please give solution in correct and step by step format thankuThe average number of cavities that thirty-year-old Americans have had in their lifetimes is 5. Do twenty year-olds have fewer cavities? The data show the results of a survey of 15 twenty-year-olds who were asked how many cavities they have had. Assume that the distribution of the population is normal. 3, 4, 4, 4, 5, 5, 6, 4, 5, 4, 3, 5, 6, 5, 3 What can be concluded at the a = 0.05 level of significance? a. For this study, we should use Select an answer b. The null and alternative hypotheses would be: Ho: ? v|| Select an answer H: ?v Select an answer v c. The test statistic ? (please show your answer to 3 decimal places.) d. The p-value = (Please show your answer to 4 decimal places.) e. The p-value is ? va f. Based on this, we should Select an answer v the null hypothesis. g. Thus, the final conclusion is that ... O The data suggest the populaton mean is significantly less than 5 at o =- 0.05, so there is sufficient evidence to conclude that the population mean number of cavities for…Explain the t-test as it relates to its application to one samples
- What are two tools which test how close the dispersion of data matches the distribution shape of a normal curve?Researcher wanted to determine if carpeted rooms containe more bacteria than uncarpted rooms. Colonies of bacteria were allowed to form in the 16 Petri dishes. A normal probality plot and boxplot indicate that the data are aproximately normally distributed with no outliers. Do carpted rooms have more bacteria than uncarpted roomz at the a= 0.05 level of signicance? carpeted rooms (bacteria/cubic foot) 11.8, 8.2, 7.1, 13, 10.8, 10.1 14.6, 14 uncarpted room( bacteria/cubic foot) 12.1, 8.3, 3.8, 7.2, 12, 11.1 10.1 13.7 a) Is this independent or dependent sampling? b) State the null and alternative hypotheses c) P-value: d) state your conclusion in the langauage of the problem.Where are most of the data gathered in a negatively skewed distribution? Which value is largerthe mean or the median?