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Based on the analysis of the regression model in Question 2, and by making reference to the assumptions of the model where appropriate, discuss your observations and highlight three (3) possible st
To gain a better insight into the price of properties in the US, fit a multiple regression using ‘Price' as the dependent variable ‘Price'. Your submission should include the following:
If the probability of success is 1/100, how many trials are necessary in order that probability of at least one success is greater than 1/2?
Given that 10% of all people are left-handed, what is the probability that there will be at least 3 left-handed students in a class of 15?
Conduct a hypothesis test to determine whether the whisper number justifies a conclusion of a statistically significant increase in the consensus estimate of economists. Use a = .01 as the level of
A researcher uses a repeated-measures study to compare two treatment conditions with a set of 20 scores in each treatment. What would be the value of df for the repeated-measures t statistic?
a) What kind of statistic should you use to test this hypothesis? b) Write the set of hypotheses you would use to test this hypothesis.
Calculate the correlation coefficient. Perform a hypothesis test to determine if there is a significant correlation (α =0.05) between number of hours of overtime worked and hours of sleep.
A professor used data from last semester's statistics class to create a regression that predicts how students will do on the final exam. The equation is yˆ = 70.2 + 3.2 (X1) - 6(X2), where X1
A hospital administrator counted the number of nurses by gender in three different nursing specialties within her health system. Perform the appropriate hypothesis test to answer this question (at
Randomly pick up 5 cards from a deck of 52 cards. Find the probability that the third card is red if the first card is ace and the fourth car is red.
a) Create a scatterplot for these data. b) Calculate the correlation coefficient.
One of your company's products, a flux capacitor, is known to have an exponential failure time distribution with a mean of 5 years. What is the reliability at 6 years?
The following data are from an independent-measures experiment comparing two treatment conditions. Do these data indicate a significant difference between the treatments at the .05 level of signif
One sample has n = 8 and SS = 21 and a second sample has n = 8 and SS = 35. What is the pooled variance for the two samples?
What is the estimated standard error for the independent-measures t statistic for the following two samples? Sample 1: n = 4 with SS = 100.
Given that 10% if all people are left-handed, what is the mean and variance for this random variable?
Given that f(z) = (1/√(2π))*e^(-z2/2), -∞ < z < ∞ , is the probability density function for the standard normal random variable, verify that the mean for the distributi
If the random Q has a continuous uniform distribution with parameters a=0 and b=3, find the probability that the roots of the equation g(t) = 0 are real, where g(t)=4t^2+4Qt+Q+2.
A sample of 12 clock radios is randomly selected without replacement from the 8,000 and tested. The entire batch will be rejected if at least one of those tested is defective. What is the probabi
What hypothesis test would be used to analyze these data? Justify your answer. Conduct the six steps of hypothesis testing for this example, using the above data.
Find the standard error of estimate, se, for the data below, given the predicted value of y = -0.206x + 2.097.
Use this calculation table for the chi-square test for goodness-of-fit to complete this exercise.
Question: For each of the following, identify the independent variable(s), dependent variable(s), and the level of measurement (nominal, ordinal, scale).
Determine the named distribution that would best used to find situations and explanation why. A person draws 5 cards, without replacement, from a normal deck of cards and counts the number of hearts.