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What is the z score for Indiana University? What is the z score for the University of Evansville? Which school was more expensive to attend in 1995, relative to the cost of education in its own catego
What is the z score for Indiana University? What is the z score for the University of Evansville?
What is the z score for the University of Evansville? Which school was more expensive to attend in 1995, relative to the cost of education in its own category?
The second sample of 40 items were chosen and measured. This second sample had an average response of 132 with a sample variance of 16. What is the pooled standard deviation for this problem? (round
Using past years' data, the population standard deviation can be assumed known as 0.30. What is the 95% confidence interval estimate of the mean undergraduate GPA for students admitted to the top gr
The lengths (in minutes) of a random selection of popular children's animated films are listed below. Estimate the true mean length of all children's animate films with 95% confidence. Assume the va
Compute the Pearson correlation. Do these data provide sufficient evidence for a real relationship in the population? Test at the .05 level, two tails.
Determine the sample size needed to reject Ho if the ratio is 3 times the hypothesized value of 2 variances, alpha = 0.05, beta = 0.10, R=3.
The mean commute time in the US seems to be increasing. The current mean is 25.1 minutes and suppose you know ? = 12. If you are testing at the 1% level of significance, Find the power to find an in
Prior to installing the new system, company analysts determined that the incoming calls to the system are Poisson distributed with a mean equal to two every 10 minute. If this incoming call distribu
An ANOVA table for multiple regression has the required information to compute the coefficient of multiple determination.
To find the sample size needed for a hypothesis test, if Ho: mu=10, Ha: mu<10, sigma is unknown, alpha = 0.01, beta = 0.05 and E = 0.80(sigma), find:
In an experiment on magazine advertisements, a researcher is examining visual displays to determine if one is more memorable. Only a small number of subjects will be avaliable for study. Should the
When conducting a hypothesis test with chi-square analysis, the null hypothesis is rejected when the differences between the expected and observed frequencies are relatively large.
Do you have sufficient evidence to conclude that the mean amount of caffeine consumed dsily by college students is less than 250mg? (Enter yes or no)
It is estimated that there are 30 depths for every 10 million people who use airplanes. a company that sells fight insurance provides $100000 in case of depth in a plane crash. a policy can be purch
A sample of 850 people resulted in a confidence interval estimate for the proportion of people who believe that the Fed. Gov.'s proposed tex increse is justified is between .14 and .20. Based on t
A fair coin is tossed 500 times. Find the probability of obtaining more than 300 heads.
A multiple-choice test consists of 77 questions with possible answers of a, b, c, d, e. Estimate the probability that with random quessing, the number of correct answers is at least 33.
An airline company is considering a new policy of booking as many as 178 persons on an airplane that can seat only 170. Past studies have revealed that only 84% of the booked passengers actually arr
About 34% of Americans have type A+ blood. A blood drive gets 140 donors. What is the probability that at least 40 of them are A+ blood donors?
It is estimated that 56% of the children between the ages of 3 and 5 years are already enrolled in school. In a sample of 150 children what is the probability that exactly 100 are enrolled in school