Probability and Statistics  – From a Z-table, a Z-value (or Z-statistic) of -1.05 shows an alpha of 0.14686. Explain what this 0.14686 means

When the Titanic sank, passenger survival rates were recorded along with additional information like their name, what class ticket they had, their age, and whether or not they had children. Some of these factors may predict whether or not a passenger was likely to survive the accident. The data set "Titanic survival.jasp" contains actual recorded data from the event. Using the variables "Class" and "Survived", conduct a Chi-Square Test for Independence, at alpha = 0.05, to see if a passengers ticket class (first, second, or third class) is significantly associated with their survival rates. Identify the correct value for df.   A. 2 B. 1309 C. 4 D. 127

The working life time, in years, of a particular model of electric oven is exponentially distributed with mean of 8. Find the 22th percentile of the working lifetime, in years.

A population of values has a mean of 59.6 and standard deviation of 35.4. Find the probability that a sample of 58 values from this population will have a mean between 52.6 and 63.8.Enter your answers as numbers accurate to 4 decimal places.

Please see attached image, I need to create a table showing an exponential smoothing average using the alpha as 0.2 and an assumed forecast for Janaury of year one of 35,000.

Suppose that a recent article by a historian stated that the mean time spent in jail by a first–timeconvicted burglar in the 20th century was 2.5 years. A study was then done to see if the mean time has increasedin the new century. A random sample of 26 first-time convicted burglars in a recent year was picked. The meanlength of time in jail from the survey was 3 years. Suppose that it is somehow known that the population standarddeviation is 1.8 years and that the population is normally distributed.The hypotheses can then be framed as:H0 : μ = 2.5 vs. Ha : μ > 2.5(a) Which of the following figures (next page) best describes the p-value for this hypothesis testingproblem. Explain your reasoning. (numbers above red shaded area represent the corresponding probabilities). (b) Write the decision and conclusion for this hypothesis testing problem if the significance level, α,is 0.1.

Calculate the X² statistic, degree of freedom and critical value.

The value of Beta with hat on top =2.8 is a statistic. True or false. Explain.

A researcher wants to test the association between 4 stress levels and 8 choices of favorite color in mature adults. The Chi-square value coputed was 30.72. At the 0.5 level what should the researcher conclue. Show work.