An article in the San Jose Mercury News stated that students in the California state university system take an average of 4.5 years to finish their undergraduate degrees. Suppose you believe that the average time is longer. You conduct a survey of 47 students and obtain a sample mean of 5.1 with a sample standard deviation of 1.2. Do the data support your claim at the 1% level?State the distribution to use for the test. What is the test statistic? Construct a 95% confidence interval for the true mean. Sketch the graph of the situation.

An article in the San Jose Mercury News stated that students in the California state university system take an average of 4.5 years to finish their undergraduate degrees. Suppose you believe that the average time is longer. You conduct a survey of 47 students and obtain a sample mean of 5.1 with a sample standard deviation of 1.2. Do the data support your claim at the 1% level?State the distribution to use for the test. What is the test statistic? Construct a 95% confidence interval for the true mean. Sketch the graph of the situation.

Name: An article in the San Jose Mercury News stated that students in the Ca
Uploaded: 2024-03-20T07:07:12.000Z
Channel: Bartleby
Description: An article in the San Jose Mercury News stated that students in the California state university system take an average of 4.5 years to finish their undergraduate degrees. Suppose you believe that the average time is longer. You conduct a survey of 47

A First Course in Probability (10th Edition)

10th Edition

ISBN:9780134753119

Author:Sheldon Ross

Publisher:Sheldon Ross

Chapter1: Combinatorial Analysis

Section: Chapter Questions

Problem 1.1P: a. How many different 7-place license plates are possible if the first 2 places are for letters and...

See similar textbooks

Similar questions

Medicare spending per patient in different U.S. metropolitan areas may differ. Based on the sample data below, answer the questions that follow to determine whether the average spending in the northern region is significantly less than the average spending in the southern region at the 1 percent level. Medicare Spending per Patient (adjusted for age, sex, and race) Statistic Northern Region Southern Region Sample mean $3,978 $7,158 Sample standard deviation $1,420 $3,679 Sample size 13 patients 19 patients (a-1) Choose the appropriate hypotheses. Assume μN is the average spending in the northern region and μS is the average spending in the southern region. a. H0: μN − μS ≤ 0 versus H1: μN – μS >0b. H0: μN − μS ≥ 0 versus H1: μN – μS < 0 multiple choice 1 a b (a-2) Specify the decision rule. (Use the quick rule to determine degrees of freedom. Round your answer to 3 decimal places. A negative value should be indicated by a minus sign.) Reject the null…
Use MSExcel file for this item. Insert sceenshots of Descriptive Statistics pop-up menu for your solutions. Use confidence level of 90%. A. What is the standard deviation and sample variance? separate answers with a comma (i.e. 3.000,9.000) B. What is the mean, median and mode? C. What is the largest value, smallest value and the sum of values?
For the following sample data, answer the following:Remember you can copy and "paste special" the table into the Excel sheet. 85 65 83 14 66 76 10 57 67 2 98 17 What is ¯xx¯ ? What is the median? What is the standard deviation? What is the Q1? What is the range?
The data below are the monthly average high temperatures for November, December, January, and February in New York City from the Country Studies/Area Handbook Series sponsored by the U.S. Department of the Army between 1986 and 1998. What is the sample standard deviation? 54, 42, 40, 40
What is the age distribution of adult shoplifters (21 years of age or older) in supermarkets? The following is based on information taken from the National Retail Federation. A random sample of 895 incidents of shoplifting gave the following age distribution. Estimate the mean age, sample variance, and sample standard deviation for the shoplifters. For the class 41 and over, use 45.5 as the class midpoint. (Round your answers to one decimal place.) Age range (years) 21-30 31-40 41 and over Number of shoplifters 253 369 273 x = s2 = s =
What was the age distribution of prehistoric Native Americans? Extensive anthropological studies in the southwestern United States gave the following information about a prehistoric extended family group of 82 members on what is now a Native American reservation. For this community, estimate the mean age expressed in years, the sample variance, and the sample standard deviation. For the class 31 and over, use 35.5 as the class midpoint. (Round your answers to one decimal place.) Age range (years) Number of individuals 1-10 30 11-20 19 21-30 20 31 and over 13 Need Help? Read
Head Start is an enrichment program for young children. The program’s administrators would like to know if this program is successful in increasing the intelligence (IQ) of its participants. They know that the IQs of children who enter the program have a mean of 88 and a standard deviation of 15 points. A sample of eighty students has an average IQ of 88.8. Has the program increased the students’ IQs?
For the following sample data, answer the following:Remember you can copy and "paste special" the table into the Excel sheet. 100 57 58 94 65 32 42 19 87 70 16 56 14 What is ¯xx¯ ? What is the median? What is the standard deviation? What is the Q1? What is the range?
Calculate the range, variance and standard deviation for the following sample data. Scores: 10, 7, 9, 1, 2, 0, 6
If you periodically collect samples of 25 undergraduates, how much will the sample mean vary from one sample to the next?
IQ, or intelligence quotient, is one way to measure a person’s ability to reason and problem solve. The IQ population standard deviation 15 points. A statistics teacher claims that students in his classes have an IQ greater than 100. He samples 20 students, and the IQ scores are listed below:86; 90; 110; 115; 100; 95; 91; 103; 98; 87;105; 95; 103; 114; 102; 99; 120; 120; 93; 101505At the α = 0.05 level, is there evidence to support the teacher’s claim?
A. Create a Histogram B. What is the sample mean of the data C. What is the sample standard deviation of the data