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1. In its standardized form, the normal distribution
a) has a mean of 0 and a standard deviation of 1.
b) has a mean of 1 and a variance of 0.
c) has an area equal to 0.5.
d) cannot be used to approximate discrete probability distributions.
2. For some positive value of Z, the probability that a standard normal variable is between 0 and Z is 0.3770. Find value of Z?
3. For some value of Z, the probability that a standard normal variable is below Z is 0.2090. Find value of Z?
4. For some positive value of X, the probability that a standard normal variable is between 0 and +2X is 0.1255. Find value of X?
What is the probability the average of the sample is more than $38000 and What is the standard deviation of the sample mean
The study does not give sufficient evidence to support the claim that less than 75% of college students spend less than $250 per semester on textbooks.
Use the mean, median, and mode to make a statement about the difference in performance for city and highway driving.
Fit a linear regression model for bp against sodium. Do you think this is a model with a good fit? Why?
Find a 99% confidence interval for the population mean number of weekly miles.
Dunn Poitiac has compiled the following sales data regarding the number of cars sold over the past 60n selling days. Answer the following questions for the sales data shown.
Sample of 36 packages reveals mean weight to be 3.01 pounds, with standard deviation of 0.03 pounds. What is the estimated population mean?
The lengths of pins produced by a machine follow a normal distribution with mean 2.54 cm and standard derivation 0.04 cm.
What is the value of the sample test statistic? (Round your answer to two decimal places.) Find the P-value of the test statistic. (Round your answer to four decimal places.)
British scientists have developed a 15 minute brain scan they hope could be used to detect autism in children. Autism and related disorders affect up to 7 out of every 1000 individuals.
In which category is ANOVA properly classified?
Assume that demand for the upcoming weekend is normally distributed with a standard deviation of 30.
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