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A skeptical paranormal researcher claims that the proportion of Americans that have seen a UFO is less than 1 in every one thousand. State the null hypothesis and the alternative hypothesis for a test of significance.
To sketch the 3-sigma X-bar chart and R-chart parameters. A candy bar manufacturer desires to set up a variables control chart for the net weight of its candy bars.
Use this information to construct a probability table, and then calculate each of the following probabilities:
Recent crime reports indicate that 5.2 motor vehicle thefts occur each minute in the United States. Assume that the distribution of thefts per minute can be approximated by the Poisson probability distribution.
The American Sugar Producers Association wants to estimate the mean yearly sugar consumption. A sample of 16 people reveals the mean yearly consumption to be 60 pounds with a standard deviation of 20 pounds.
Perform a study to compare the characteristics of patients discharged against medical advice from the institution
Compose a 350 to 700-word summary report of your findings to the researcher and owner of the restaurant in which you Identify evidence, if any, of the researcher's claim. Perform a one- or two-tail test on the data provided,
What conclusions can you draw about the nature of the relationship between anxiety and exam performance?
Use the relative frequency approach to construct a probability distribution for the number of tests taken.
What percentage of the averages or medians of the sample will be greater than 140 seconds?
What is the probability of the person is 20 to 24 years old.What is the probability of the person is 20 to 34 years old.
The management of a regional bus line thought its cost of gas might be correlated with its passenger/mile ratio. Comment on the data and correlation matrix below.
Compute mean absolute percentage error (MAPE) of the forecasts.
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