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According to the school board 48% of all the voters in the district support the refeendum. Suppose a principal is interested in the proportion who supported the referendum in a group of 38 parents.
What is the probability that the portion of the group who support the referendum is at least two thirds?
What is the probabilty that the proportion of the group who support the refendum is no more than 30%?
A food snack manufacturer samples 7 bags of pretzels off the assembly line and weighs their contents. If the sample mean is 12.7 oz. and the sample standard deviation is 0.40 oz., find the 95% confidence interval of the true mean.
The average 1-ounce chocolate chip cookie contains 110 calories. A random sample of 15 different brands of 1-ounce chocolate chip cookies results in the following calorie amounts. At a=0.01 level
a random sample of 225 sat scores has a mean of 1500. assume that sat scores have a population standard deviation of
Students given exam with 300 multiple questions, distribution was normal and mean 195 with a standard deviation of 30. What were the scores of the students who are within one standard deviation of the mean?
answer the followinga- if the correlation coefficient is -0.15 what is the sign of the slope of the regression line?b-
james w. has a portfolio that includes 20 shares of disney and 30 shares of amazon. the price of disney stock is
Assume a normal distribution for pH values. If a random sample of 10 readings in a vat is taken and the mean pH is computed, find each of the following?
Multiple choices based on regression analysis - how much or how many but instead is assigned values to represent categories
What is the probability that only the first child will have cystic fibrosis? What is the probability that they will have 2 normal sons and 1 daughter with cystic fibrosis?
Calculate a sample mean and standard deviation and then reject shipment if the sample average falls below some agree-upon value.
Normally distributed with a mean of 852 and a standard deviation of 143. The proportion of days when at least 800 cars pass through the intersection is about?
What critical values should replace 1.645 and 2.326 in order to apply a Bonferroni correction to this multiple testing situation? What would the result of the Bonferroni correction be in terms of stars?
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