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Computing the probability values using normal distribution.
Laboratory rats commit an average of µ = 40 errors before they solve a standardized maze problem. The distribution of error scores is approximately normal with a standard deviation of σ = 8. A research is testing the effect of a new dietary supplement on intelligence. A newborn rat is selected and is given the supplement daily until it reaches maturity. The rat is then tested on the maze and finishes with a total of X = 24 errors.
1. What is the probability that a regular rat (without the supplement) would solve the maze with a score less than or equal to X = 24 errors? 2. Is it reasonable to conclude that the rat with the supplement is smarter than the vast majority of regular rats? 3. Does it appear that the supplement has an effect on intelligence? Explain your answer.
When the p-value is used for hypothesis testing, the null hypothesis is rejected if
Determine the probability of choosing the area code at random which ends in the odd number if first digit cannot be 1 or 0?
Does this sample indicate a smaller average? Use α = 0.05 and assume a normally distributed population.
Confirm that these statements are accurate by finding the geometric mean rate of increase.
Define the rejection region. State the statistical decision.
Let independent variable x represent years since 1950. Determine quadratic regression model for per capita cigarette consumption.
Plot the control limits for the mean outside diameter and the range.
Fast Service Truck Lines uses the Ford Super Duty F-750 exclusively. Management made a study of the maintenance costs and determined the number of miles traveled during the year followed the normal distribution. The mean of the distribution was 60..
What is the equation for this regression model?
Paired samples t-test for the given data - financial advice from the voluntary organization - A local voluntary organization affiliated to the Citizens Advice Bureau offers free financial advice to residents in the area who are registered debtors
A Correlation matrix (correlation, coefficients and probability level under the hypothesis rho= 0) for a company's sales force (age, years of service, and current sales) is given below. Comment.
A student team examined parked cars in four different suburban shopping malls. One hundred vehicles were examined in each location.
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