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Are the companies equal from point of view of fat amount? Test at .02 significance level
Company A: ?Average amount of fat = 10.6 milligrams; standard deviation = 2.6 milligrams; n = 13
Company B: ?Average amount of fat = 10.2 milligrams; standard deviation = 2.4 milligrams; n = 10
According to a report by Scarborough Research, the average monthly household cellular phone bill is $73. Suppose local monthly household cell phone bills are normally distributed with a standard deviation of $11.35.
Find the z-score for each score in the population. Transfer the original population into a new population of N=5 scores with a mean of μ=60 and a standard deviation of σ=8
Claculate the exponential also adjusted exponential smoothing forecast and linear trend forecasting. The hotel has experienced the following occupancy rates for the past 9 years.
In a random sample of 10 adults from a nearby county, the mean waste generated per person per day was 4.35 pounds and the standard deviation was 1.88 pounds.
What is the probability of making a Type II error if the population mean is 24,000 miles?
Explain why one would expect to find a positive correlation between the number of fire engines that respond to a fire and the amount of damage done in the fire. Does this mean that the damage would be less extensive if fewer fire engines were disp..
To test whether there is significant mean difference between two groups using independent sample t test.
Psychologists once measured 77 variables on a sample of schizophrenic people and a sample of people who were not schizophrenic. They compared the two samples using 77 separate significance tests.
Bicycle helmet use. Table lists data from a cross-sectional survey of bicycle safety. The explanatory variable is a measure of neighbourhood socioeconomic status (variable_RFM). The response variable is "percent of bicycle riders wearing a helmet"..
Explain the ANOVA output table values:
The lifetimes of light bulbs of a particular type are normally distributed with a mean of 370 hours and a standard deviation of 5 hours. What percentage of bulbs has lifetimes that lie within 1 standard deviation of the mean on either side?
What is the probability that all three students pick exactly the same card?
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