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According to admissions at Blank Slate University, the average ACT score of the incoming freshman class is 23. An intrigued incoming freshman has reason to believe that the actual average ACT score at Blank Slate University is higher than 23. This student takes a simple random sample of 80 incoming freshman and computes an average ACT score of 24.2. Assume that we know the standard deviation of ACT scores of the incoming freshman class at Blank Slate University is 4.8. Consider the question: Does this survey indicate that the mean ACT score at BSU is higher than 23?
a) State the null and alternative hypotheses relative to this question.
b) Find the test statistic.
c) What is the P-value?
d) Can we reject the null hypothesis? Explain why or why not.
Many people believe that abnormal behavior is more likely to occur during a full moon. As a test for empirical evidence to support this belief, a study was conducted based on admission of new clients over a one year period by lunar phases:
Chi-square test for independent attributes - Are the opinions on the tax cut proposal independent of party affiliation? Use a = 0.01
the number of misprints per page of text is commonly modeled by a poisson distribution. it is given that the parameter
The average age of the women was 36.97 with a standard deviation of 8.893. If a 95% confidence interval is calculated to estimate the difference between the two average ages, what is the margin of error? Assume both population standard deviations ..
1.an experiment was conducted to determine the effects of three different pesticides p1p2p3 on the yield of three
Calculate the test statistics
a box contains 3 marbles 1 red 1 green 1 blue. consider an experiment that consists of taking 1 marble from the box
The grades on the exam have a mean score of 80 with a standard deviation of 6. Describe as completely as possible the distribution of grades.
If we know that the length of time it takes an MBA student to find a parking spot near the DePaul Center follows a normal distribution with a mean of 3.5 minutes and a standard deviation of 1 minute, find the probability that a randomly selected MBA ..
Suppose that the distribution of calories is approximately normal with o = 10. Find the probability that a randomly selected chocolate bar will have a) Between 200 and 220 caloies.
The least squares method minimizes and identifies the range for a correlation coefficient - statements is least accurate concerning correlation analysis?
if when measured in degrees celsius temperature is normally distributed with mean 115 and standard deviation 2 what can
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