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For the following investigative scenarios, state the null hypothesis, and the alternative hypothesis. Also identify the Type 1 and Type 2 errors
Testing Hypothesis. Identify the null hypothesis, alternative hypothesis, test statistics, P-value or critical value (s), conclusion about the null hypothesis
Accounting procedures allow a business to evaluate their inventory at LIFO (Last In First Out) or FIFO (First In First Out)
You are visiting Dad's Root Beer Plant in Oakland. You are asked by the plant supervisor to determine if the Dad's Brand soda machines are correctly dispensing
Statistics and its role in psychological research
For each of the following hypotheses, decide whether a one-tailed or two-tailed test would be performed:
A researcher is looking at the relationship between home-schooling and achievement. She is hypothesizing that the home-schooled children will score higher
You are working with a piece of manufacturing machinery that fills pouches; the pouch weight is supposed to be 8.8 ounces after being filled
Describing a new hypothesis test using a different statistic (large sample size,small sample, means and /or proportions, one and two-tailed tests)
If two independent samples are used in a hypothesis test concerning the difference between population means for which the combined degrees of freedom is 20
The city of Denver wishes to see if there is a linear relationship between temperature and the amount of electricity used
The data presented in the table below resulted from an experiment in which seeds of 5 different types were planted and the number of seeds
A manufacturer of flashlight batteries took a sample of 13 batteries from a day's production and used them continuously until they failed to work
An environmentalist estimates that the more waste recycled by adults in the country is more than 1 pound per person per day. You want to test this claim.
A local chess club claims that the length of time to play a game has a mean of 49 minutes or more. Write sentences describing type I and type II errors
Write the null and alternative hypotheses. Identify which is the claim.
Considering that a researcher can test at the
A random group of students was selected from a large student conference to analyze their class in school. Is there evidence to reject the hypothesis
A statistician believes that the SD of the weights of firemen is less tha 25 pounds. A sample of 20 firemen had a SD of 23.2 pounds.
Task: Use a P-value to test the claim about the population mean using the given sample statistics. State your decision for a=0.05
In Meijer supermarket, the customer's waiting time to check out is approximately normally distributed with a standard deviation of 2.5 minutes.
A flash drive manufacturer has set a standard on their production process. When defects exceed 3%, the production process is unacceptable.
A sample of 25 concession stand purchases at the October 22 matinee of Bride of Chucky showed a mean purchase of $5.29 with a standard deviation of $3.02
What are the elements of a study plan? Where might a beginning researcher lose logical flow among elements in a study plan? Why might that happen?
Describe a 5-step hypothesis test for two variances for a particular claim related to a real life experience.