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Suppose the scores for a college entrance exam follow a normal distribution with mean 480. You are told that 95% of the scores range between 300 and 660. Using the 68, 95,99.7 rule, what is the standard deviation of exam scores?
Develop a hypothesis, label the independent and dependent variables, discuss what the experimental and control groups are doing in this study, and decide who (and how many) participants are needed. Be sure to discuss random sampling and random ass..
Standard deviation of 100. The top 3% of students receieve $500. What is the minimum score you would need to receive this money? Calculate the z-score.
Please identify a research question that can be addressed with a hypothesis test. An example might be to identify the presence of bacteria in a batch of milk.
State one referenced hypothesis including the three variables (FA as an IV, age as the covariate and RS as the DV)
Perform a posthoc test that is suitable if we assume that group 7 is a control group and that the other are different treatment groups and that we are only interested in finding significant treatments, not to compare them.
The cost of an e-commerce website can vary a great deal. A market research team hypothesized that the cost of an average website is $3500.
What is the likelihood that the mean annual precipitation during 25 randomly picked years will be less than 90.8 inches?
Attended a religious service at least once a month, 20 stopped to help a person with car trouble. At the 0.05 significance level, test the claim that the two proportions are equal.
Suppose a fast food restaurant wishes to estimate average sales volume for a new menu item. The restaurant has analyzed the sales of the item at a similar outlet and observed the following results:
Given this information, what would sampling error be if sample including seven values in top row were used to calculate sample mean?
The random variable X is the distribution of siblings of a student selected at random from a particular secondary school. Its probability distribution is given in the table.
Determine the likelihood of accepting a lot which is 1% defective?
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