The Central Intelligence Agency has specialists who analyze the frequecnies of letters of the alphabet in an attempt to decipher intercepted messages. In standard English text, the letter e is used most often at a rate of 12.702%. In an intercepted message sent to Iraq, a page of 1516 characters is found to have the letter e occurring 175 times. Is this unusual?

Which of the following is the most appropriate type of chart for determining the number of observations at or below a specific value? Select one: a. A histogram. b. A pie chart. c. A time-series chart. d. A cumulative frequency ogive.

in the table below, what data is inputted in spss for a chi-square analysis?    Irregular Seat Belt Use?   Yes No Texted While Driving 1737 2048 Did not Text While Driving 1945 2775

If age were held fixed, but a person put on 15 pounds, what would you expect for the corresponding change in systolic blood pressure? (Use 2 decimal places.)If a person kept the same weight but got 15 years older, what would you expect for the corresponding change in systolic blood pressure? (Use 2 decimal places.)(e) Test each coefficient to determine if it is zero or not zero. Use level of significance 5%. (Use 2 decimal places for t and 3 decimal places for the P-value.)   t P value β2     β3

Question 9 How could the survey question "Have you ever had a drink of alcohol?" be revised to obtain a valid inference about the percent of drinkers in the population? o Do your parents drink? O Do you like the taste of wine? How often do you have an alcoholic beverage? O What do you think of alcohol use? Question 10

True or false: In order to use chi-square tests, each OBSERVED FREQUENCY must be at least 5

Question 7 Find the standard deviation of the data set: 15, 42, 53, 7, 9, 12,14, 28,47. 16.78

If age were held fixed, but a person put on 15 pounds, what would you expect for the corresponding change in systolic blood pressure? (Use 2 decimal places.)If a person kept the same weight but got 15 years older, what would you expect for the corresponding change in systolic blood pressure? (Use 2 decimal places.)(e) Test each coefficient to determine if it is zero or not zero. Use level of significance 5%. (Use 2 decimal places for t and 3 decimal places for the P-value.)   t P value β2     β3