How much time per week do students spend on their assignments and review at home? A random sample of 36 USC (University of Southern California) students indicates that the mean time spent on studying at home is equal to 15.3 hours per week, with a population standard deviation equals to 3.8 hours. 1) Form a 95% CI estimate for the population mean time spent on studying at home. 2) What sample size is needed to be 90 % confident of being within only one third of the margin of error in 1).

A group of students estimated the length of one minute without reference to a watch or clock, and the times (seconds) are listed below. Use a 0.01 significance level to test the claim that these times are from a population with a mean equal to 60 seconds. Does it appear that students are reasonably good at estimating one minute? 
66 83 37 68 45 25 63 64 64 47 65 72 93 88 65 What are the null and alternative hypotheses?

What is the test statistic?

Identify the P value

Conclusion

The following are final exam scores for 30 students in an elementary statistics class.

91            59            82            91            79            76            90            69            77            83

59            88            95            72            88            81            77            52            80            96

62            97            76            75            75            89            61            72            90            85

a.              Find the quartiles for this data______________________________.

b.             What is the Interquartile Range (IQR)_________________________?

c.              What percent of students got at least a 72 on their final exam______________?

d.              Build a boxplot using the graphing calculator.

62% of all students at a college still need to take another math class. If 4 students are randomly selected, find the probability that

a. Exactly 2 of them need to take another math class.
b. At most 2 of them need to take another math class.
c. At least 2 of them need to take another math class.
d. Between 2 and 3 (including 2 and 3) of them need to take another math class.

Round all answers to 4 decimal places.

Design a lesson plan for your school (or workplace) that teaches students (or employees) about different cultures. At a minimum, include the following categories in your lesson plan: Objectives, Procedures, Reading Assignments, Materials, and Assessment. In addition, attach an assessment that you will use to determine if the students (or employees) learned from your lesson. There is a lesson plan template you may use located in course resources. Your lesson plan must be entirely original. Please provide title page, citations, and reference page for this assignment.

Determine whether the following should be classified as simple random, systematic, convenience, stratified, or cluster sampling.

1. Church members are each assigned a number and then a random-number table is used to select the members who will complete the survey

2. Ten students from every 8:00 MWF math class at Tech are selected to complete a survey

3. Every 15th person who enters a local store is selected and asked questions regarding the cleanliness of the store

4. Five students from every dorm on campus are selected

Creating a Database Design

Lab 1: Creating a Database Design (Wk 3) - OR - Draw with pencil and paper diagram (take photo of it and submit) along with a summary of the diagram you prepared in a Word document.

Use the scenario from Assignment 1: Business Rules and Data Models to complete the lab:

Suppose a local college has tasked you to develop a database that will keep track of students and the courses that they have taken. In addition to tracking the students and courses, the client wants the database to keep track of the instructors teaching each of the courses.

Statistics students believe that the mean score on a first statistics test is 65. The instructor thinks that the mean score is higher. She samples 10 statistics students and obtains the scores:

Test grades are believed to be normally distributed.

Use a significance level of 5%.

1. State the standard error of the sample means:  (Round to four decimal places.)
2. State the test statistic: t=t=  (Round to four decimal places.)
3. State the p-value