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1. Below is a normal plot of residuals from a regression. Does the plot indicate any problems with the assumption that the residuals are Normally distributed?
A. There are no problems evident in the plot.B. The residuals show some high outliers.C. The residuals are not Normally distributed.
2. A regression was performed on a data set with 22 data points where we were investigating the relationship between a midterm score and the grade on the final exam. We obtained a correlation of 0.30. The t statistic for determining if the relationship is significant isA. t = 1.48.B. t = 1.41.C. t = 1.60.
3. Confidence intervals for a mean response are narrowest where?A. near the ends of the dataB. near the middle of the dataC. They are the same width throughout a data set.
Using the following data, test the question that an equal number of Democrats, Republicans, and Independents voted during the election. Test the hypothesis at the .05 level of significance.
Use a 95% confidence interval for multiple comparisons. Show your calculation by hand between Monday and Tuesday. Match your answer with Minitab output. Attach Minitab output.
Fill in the P (X=x) values in the table to give legitimate probability distribution for the discrete random variable X, whose possible values are -4, 1,2,3 and 6.
If the production process is in control, the mean number of chips per cookie is 6.0 What is the probability that in any particular cookie being inspected. What is probability that in any partcular cookie being inspected, there are less than 4 choco..
The measure of forecast accuracy that is not influenced by the measurement scale of the time series data is:
Identify the significance level, the test statistic, and the critical value, state whether you are rejecting or failing to reject the null hypothesis statement and explain how the results could be used by the manager of the company.
which is a value often used for the upper limit of the range of normal values. What do the results suggest about the sample group?
An automobile manufacturer advertises that the mean petrol consumption of its new hybrid car does not exceed 4.6 litres per 100 km. An independent company decides to test the manufacturer's claim by selecting a random sample of 16 vehicles and mea..
Write three quadratic equations within a, b, c (coefficients of x^2, x and the constant as 1 integers, 2 rational, 3 irrational numbers).
What is the probability that a cereal would be high calorie, given that is low fiber? In other words, what is P (high calorie, given low fiber)?
What is the minimum sample size needed if the total width of the confidence interval must be less than 5 percentage points?
Find the probability that the mean weight of those loads is less than 44.24 tons. Assume that the variable si normally distributed.
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