2. It’s conventional wisdom that grad students drink 4 cups of coffee per day. A graduate student took a sample of 25 fellow graduate students in her statistics class, and in the sample produced a mean of 3.3 cups per day and a standard deviation of 1.75. Because of this, she believes that the average is actually less than what is commonly thought (4 cups per day). Do we believe the graduate student’s claim or the conventional wisdom? Use a significance level of .05. Show all the steps (4 steps) discussed in class.
2. It’s conventional wisdom that grad students drink 4 cups of coffee per day. A graduate...
If people drink between 0, 1, 2 or 3 cups of coffee per day, where the number of cups per day are equally likely? What is the expected number of cups that people drink per day?
A survey of college students was conducted during final exam week to assess the number of cups of coffee consumed each day. The mean number of cups was 5 with a standard deviation of 1.5 cups. The distribution was normal. A. What proportion of students drank 7 or more cups of coffee per day? B. What proportion of students drank 2 or more cups of coffee per day? C. What proportion of students drank between 2 and 7 cups of...
2. The average number of cups of coffee drunk each day by a randomly selected sample of 25 students was 4.4. Assume the population standard deviation is 0.5 cups of coffee. Does the sample provide enough statistical evidence to support a claim that students drink 4 cups of coffee per day on average? Test the hypothesis at a 1% level of significance. Perform a 1-sample Z-test of mean to assess the sample evidence. A. State the null and alternative hypotheses...
fee? 5) Amon g coffee drinkers, men drink a mean of 3.4 cups per day with a standard deviation of 0.8 cup. Assum distribution. e the number of cups per day follows a normal a. What proportion drinks 2 cups per day or more? b. What proportion drinks no more than 4 cups per day?
please round to 4 decimal places The amount of coffee that people drink per day is normally distributed with a mean of 16 ounces and a standard deviation of 5 ounces. 15 randomly selected people are surveyed. Round all answers to 4 decimal places where possible. What is the distribution of X? X N b. What is the distribution of 7 -N c. What is the probability that one randomly selected person drinks between 15.5 and 17 ounces of coffee...