Blog

You are a business analyst working for a tech company in Seoul. The company is planning a report on smartphone usage among different age groups, with a focus on the younger generation. To provide accurate information to your clients, your supervisor has asked you to estimate the proportion of young adults (aged 18-24) who use their smartphones for more than 5 hours a day. You have collected a sample data set from various young adults in Seoul. Using this data, estimate the proportion of young adults who use their smartphones for more than 5 hours a day. Use a 90% confidence level for your estimate and round your answers to four decimal places.   Here is the sample data you collected (hours per day of smartphone usage):   4, 8, 3, 7, 3, 3, 3, 1, 2, 3, 6, 3, 9, 10, 3, 1, 8, 4, 1, 8, 2, 4, 1, 9, 4, 2, 9, 1, 2, 10, 4, 6, 7, 4, 7, 9, 8, 4, 2, 6 HELPFUL NOTE: Copy and paste the data into an Excel workbook. If it jams it all into a single cell, use the “text to columns” function in the Data ribbon to tell it to split it into individual cells using a comma delimiter. Left bound = [leftbound] Right bound = [rightbound]

A(n) ____________________  is best described as the blueprint for a speech.

A client voices concerns about preventing neural tube defects during pregnancy. Which supplement will the nurse recommend to prevent the problem?

How many main points should be in the body? 

Which of the following is a common cause of fluency hiccups?

How does a smaller sample size affect the width of the confidence interval?

The processing time for a batch of products in a factory follows a normal distribution with a mean of 30 minutes and a standard deviation of 5 minutes. What is the probability that the processing time will be between 26 minutes and 38 minutes? Select the correct Excel function statements to calculate this probability.

Feedback tells the speaker what effect she or he is having on the listener(s).

This is an original exam question by Prof Kay Han. It is forbidden to photograph, upload, download, copy, or share this problem with anyone, or to post it to any website.   In the picture below, there are three forces pulling a box.  The mass M of the box is [m] kg.  Calculate the acceleration of the box with the following information: F1 = [f1] N F2 = [f2] N F3 = [f3] N

Patti presents a wonderful speech to the class. Her speech is easy to follow and understand. She uses phrases like, “to begin with,” “for example,” and “let’s move on to something even more exciting..” She is using: