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The following data are collected as part of a study of coffee consumption among undergraduate students. The following values reflect cups per day consumed:
3 4 6 8 2 1 0 2
a. Compute the sample mean.
b. Compute the sample standard deviation.
c. Construct a 95% CI for the mean number of cups of coffee consumed among all undergraduates.
For the past 20 years, the high temperature on April 15th has averaged (j = 62 degrees with a standard deviation of a = 8. Last year, the high temperature was 66 degrees.
Construct a probability for the number of students in the sample who watch soap operas.
For the following ANOVA experiments, determine the critical region(s) and critical value(s) that are used in the classical approach for testing the null hypothesis
What is the calculation if facebook reports that the average number of facebook friends worldwide is 175.5 with a standard deviation of 90.57 . If i was to take a sample of 25 students, what is the probability that the mean number of facebook frie..
Philadelphia is conducting a study on the characteristics of tourists who drive to Eagles football games. Previous studies indicate that approximately 70% of all game attendees are people who decided to drive from out of town
For the binomial sample information summarized below, indicate whether the sample size is large enough to use the large sample approximation to construct a confidence interval for p.
Determine the 95% confidence interval for true percent of car owners in this city who received the speeding ticket this year. Explain your results to nearest hundredth of percent.
Assume the distribution of ages of homes follow an approximately normal distribution. Show all the seven steps and include the p-value.
Discuss why sampling is essential to many research designs, and why, if done correctly may be more accurate than attempting census measurement.
The publisher of Celebrity Living claims that the mean sales for personality magazines that feature people such as Angelina Jolie or Paris Hilton are 1.5 million copies per week.
Quality Control A quality inspector checked for imperfections in rolls of fabric for one week. The random variable x represents the number of imperfections found.
a social psychologist was interested in examining the effect of being observed on sports performance and if competition
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