Classify each of the following quantitative variables as either continuous or discrete.  a. Number of letters in a word  [a] b. Length of a piece of rope [b]

Find the area under the standard normal curve to the right of z = 1.25.

A random sample of 400 SMC students indicated that 271 of them said they drink coffee daily  Find the 95% confidence interval for the true proportion of SMC students that drink coffee daily.  Round the endpoints of the interval to three decimal places.  Assume that the conditions to find the confidence interval are met. 

Identify the level of measurement (nominal, ordinal, interval, ratio) for each of the following variables.  a. meal being eaten: breakfast, lunch, dinner [a] b. number of pets in a household [b] c. temperature of a lake [c] d. type of bread used in a sandwich [d]

Suppose you want to find the confidence interval at a confidence level of 93%.  What is the corresponding critical value, 

A poll of 2084 Santa Monica residents asked their age, how long they had lived in Santa Monica and whether they supported raising the minimum wage in the city.   Answer each of the following. a) What is the population in this study?  [pop] b) What is the sample in this study? [sam] c) List the variable(s) of interest in this study.  [var]

The probability that an airline flight is delayed is [x].  What is the probability that an airline flight is not delayed? Enter your response rounded to three decimal places in the format 0.XXX.  If you do not use the correct format your response will be considered incorrect. 

Suppose you want to test the claim that μ < 35.7. Given a sample size of n = 31 and a level of significance ofα = 0.10, when should you reject the null hypothesis ?

A marketing firm wants to compare the proportion of those who say they are regular viewers of reality TV in the 20-29 year and 30-39 year age groups.  In a random sample of 150 people aged 20-29, 52 said they are regular viewers of reality TV.  In a random sample of 200 people aged 30-39, 53 said they are regular viewers of reality TV.  At the 0.05 level of significance test to determine if the proportion is the same in the two age groups.  Assume that the conditions to complete the hypothesis test are met.  1) What is the correct null and alternative hypothesis?  Choose from the options below.  [answer1]                                   a.     H0: 

A random sample of SMC math students are asked how much time (in minutes) they spend on math homework per day.  The responses are listed below.  Calculate the 95% confidence interval for the mean time an SMC math students spend on homework per day.  Assume that the conditions are met to calculate the interval.  Round the end points of the interval to one decimal place.  The units of the interval are minutes.  54     62     42     49     39     53     41     39     29     71