Katy Perry is currently the most popular account on Twitter® with about 100 million followers. Mrs. Zane wondered what proportion of Katy Perry’s Twitter followers are female, so she selected a random sample of 500 of Katy Perry’s followers. In the sample, 308 are female. Construct a 90% confidence interval for the proportion of all of Katy Perry’s Twitter followers who are female. Follow the four-step process and upload a scan/picture of your work.

Logan and Brian began arguing about who did better on their tests, but they couldn't decide who did better given that they took different tests. Logan took a test in Art History and earned a 76.8, and Brian took a test in English and earned a 68.9. Use the fact that all the students' test grades in the Art History class had a mean of 71.9 and a standard deviation of 11.6, and all the students' test grades in English had a mean of 61 and a standard deviation of 9.4 to answer the following questions.a) Calculate the z-score for Logan's test grade.z=z= [Round your answer to two decimal places.] b) Calculate the z-score for Brian's test grade.z=z= [Round your answer to two decimal places.]c) Which person did relatively better? Logan Brian They did equally well.

The national profession exam for registered nurses, the NCLEX, has pass a rate of 85% for the first time exam takers. If 260 first time RN candidates were to take the exam, What is the mean for the number of people who pass?

Please answer all of the question in the pictures, Please. THank you.

A psychologist wanted to know if students in her class were more likely to cheat if they were low achievers. She divided her 60 students into three groups (low, middle, and high) based on their mean exam score on the previous three tests. She then asked them to rate how likely they were to cheat on an exam if the opportunity presented itself with a very limited chance for consequences. The students rated their desire to cheat on a scale ranging from 1-100, with lower numbers indicating less desire to cheat. The data: Achievement_Group Cheat 1 20 1 40 1 49 1 50 1 51 1 51 1 52 1 53 1 58 1 42 1 48 1 48 1 52 1 55 1 55 1 56 1 59 1 67 1 80 1 79 2 19 2 25 2 20 2 29 2 24 2 32 2 25 2 27 2 30 2 55 2 40 2 25 2 27 2 35 2 42 2 30 2 30 2 34 2 40 2 27 3 60 3 65 3 69 3 78 3 79 3 80 3 80 3 90 3 95 3 50 3 55 3 55 3 60 3 69 3 70 3 70 3 88 3 90 3 90 3 91   Before opening the data,…

A psychologist wanted to know if students in her class were more likely to cheat if they were low achievers. She divided her 60 students into three groups (low, middle, and high) based on their mean exam score on the previous three tests. She then asked them to rate how likely they were to cheat on an exam if the opportunity presented itself with a very limited chance for consequences. The students rated their desire to cheat on a scale ranging from 1-100, with lower numbers indicating less desire to cheat.    Before opening the data, what would you hypothesize about this research question?

A business school dean in Ohio wants to know if graduates who completed an internship during their undergraduate years earn more than business undergraduates who do not complete an internship while in college.  Based on national survey from 1,500 business alumni with less than six years of work experience, they earn on average $50,970 with a standard deviation of $12,976.  Business alumni from the Ohio  school who completed internships on average earned $53,497.  The dean wants you to be 96% confident in your results. a. State in statistical terms the null and alternative hypotheses. b. Determine the appropriate test statistic (z or t). c. Determine the critical value(s). d. Compute the test statistic. e. Make a decision on the hypotheses. (which hypothesis is correct?) f. Determine the p-value for the test statistic.

find 3rd percentile for given data  12,15,30,32,16,17,9,24,29,35,18,15,24,16,25,

find first and third quartile of data   12,45,85,6,45,12,58,95,3,5,45,12,58,62,73,91,58,12.

Use the data set {13, 16, 17, 18, 19, 19, 20, 25, 27, 30, 35, 42} The data represent the ages of a random sample of people in line ride a roller coaster.  Find the interquartile range (IQR).