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In the upcoming govenor's election, the most recent poll based on 900 respondants predicts that the incumbant will be reelected with 55% of the votes. For the sake of argument, assume that 51% of the actual voters in the state support the incumbent govenor (p=0.51).
Calculated the probability of observing a sample proportion of voters 0.55 or higher supporting the incumbent governor.
Calculate the value of the chi-square statistic and test whether all regions are statistically the same at 5% and 1% level tests.
What is the appropriate inferential statistical test for the case scenario? Why?
How many cans of paint should the sample contain if the researcher wants to be 98% certain of being within one percentage point of the true proportion of this chemical?
Add line-of-best fit (trend line/linear regression line) to your scatterplot. Write down the equation of the trend line below.
Conduct a two-sample test of means. A study by a bank compared the average savings of customers who were depositors for three years or less with those who had been depositors for more than three years.
If the packets are sold in multi-packs containing six packets, what is the distribution of the number of prizes in a randomly chosen multi-pack?
A well-established power-drink dispensing machine is programmed to dispense an average of 2.02 liters into a container labled"2 liters". Actual quantities are known to be normally distributed with a standard deviation of 0.015 liters. What is the ..
An accounting firm is planning for the next tax preparation season. From last year's returns, the firm collects a systematic random sample of 100 filings.
Determine the variance of firm's profit for the month.
Is your sample of MSU students significantly different from the population of MSU students in terms of the number of classes they take per semester (use alpha level .05)? To answer this question, follow all of your steps for hypothesis testing.
Draw a scatter diagram of the following bivariate data.
What is the percentage of variation in the dependent variable explained by the variation in the independent variable.
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