A recent drug survey showed an increase in the use of drugs and alcohol among local high school seniors as compared to the national percent. Suppose that a survey of 100 local seniors and 100 national seniors is conducted to see if the proportion of drug and alcohol use is higher locally than nationally. Locally, 66 seniors reported using drugs or alcohol within the past month, while 60 national seniors reported using them. Conduct a hypothesis test at the 5% level. a. State the distribution to use for the.test. (Round your answers to four decimal places.) P'local P'national - N (0,) ww w m

A recent drug survey showed an increase in the use of drugs and alcohol among local high school seniors as compared to the national percent. Suppose that a survey of 100 local seniors and 100 national seniors is conducted to see if the proportion of drug and alcohol use is higher locally than nationally. Locally, 66 seniors reported using drugs or alcohol within the past month, while 60 national seniors reported using them. Conduct a hypothesis test at the 5% level. a. State the distribution to use for the.test. (Round your answers to four decimal places.) P'local P'national - N (0,) ww w m

Name: A recent drug survey showed an increase in the use of drugs and alcoh
Uploaded: 2024-03-20T07:07:00.000Z
Channel: Bartleby
Description: A recent drug survey showed an increase in the use of drugs and alcoholamong local high school seniors as compared to the national percent.Suppose that a survey of 100 local seniors and 100 national seniors isconducted to see if the proportion of dr

MATLAB: An Introduction with Applications

6th Edition

ISBN:9781119256830

Author:Amos Gilat

Publisher:Amos Gilat

Chapter1: Starting With Matlab

Section: Chapter Questions

Problem 1P

See similar textbooks

Similar questions

What percent of the observations in a distribution are LESS than the third quartile? O a. 25% O b. 75% O c. 68% Od 50%
The USDA prepared a report indicating that a family of four spent on an average $890 per month on food. Assume the distribution of food expenses for a family of four follows a normal distribution with a SD of $90 per month. What percent of the families spend more than $430 but less than $890 per month? What percent of the families spend between $830 and $1000 per month?
In the class poll from the beginning of the year, you were asked what color car you drive. The results are summarized below. aqua 3 beige/tan/gold 39 black 80 blue 44 green 21 orange 3 pink 1 purple 3 red 45 silver 63 white 74 yellow 1 What is the mode for this data set?
Bottles of purified water are assumed to contain 250 milliliters of water. There is some variation from bottle to bottle because the filling machine is not perfectly precise. Usually, the distribution of the contents is approximately Normal. An inspector measures the contents of eight randomly selected bottles from one day of production. The results are 249.3, 250.2, 251.0, 248.4, 249.7, 247.3, 249.4, and 251.5 milliliters. Do these data provide convincing evidence at α = 0.05 that the mean amount of water in all the bottles filled that day differs from the target value of 250 milliliters?
The average house has 11 paintings on its walls. Is the mean larger for houses owned by teachers? The data show the results of a survey of 14 teachers who were asked how many paintings they have in their houses. Assume that the distribution of the population is normal. 12, 13, 12, 12, 12, 11, 13, 12, 13, 11, 10, 12, 11, 13 What can be concluded at the a = 0.05 level of significance? a. For this study, we should use Select an answer b. The null and alternative hypotheses would be: Но: Select an answer H1: Select an answer c. The test statistic ? ▼ (please show your answer to 3 decimal places.) d. The p-value = (Please show your answer to 4 decimal places.) e. The p-value is (? v f. Based on this, we should | Select an answer the null hypothesis. g. Thus, the final conclusion is that ... The data suggest the population mean is not significantly more than 11 at a = 0.05, so there is sufficient evidence to conclude that the population mean number of paintings that are in teachers' houses…
Three sample observations taken for two variables are shown below: X (In $) (In ounces) 2.78 0.60 1.79 1.47 0.80 2.34 When comparing X and Y, which varies the most? What is the value of this statistic (ornitting unit labels such as $, s2, ounces, ounces Ca. Y, 59.1837 Ob. X, 61.7026 CC. Y, 0.8700 Od. None of the answers is correct Ce. X, 0.9801
The correlation between midterm and final grades for 300 students is 0.620. If 5 points are added to each midterm grade, the new r will be: a. 0.124 b. 0.57 c. 0.62 d. 0.744
An immunologist wants to compare two rabies vaccines. People who had previously received the vaccine were divided into two groups. The first group received a booster dose of type I vaccine and the second group received a booster dose of type II vaccine. Two weeks later the antibody level was measured. The average number of antibodies in each group appears in the following table: Do these data indicate that there is a difference in the effectiveness of the two vaccines used for booster doses? Assume a normal distribution and equal population variances. What type of hypothesis test will allow us to reach a conclusion in the situation posed above? A. Variance test B. Unilateral for difference in proportions C. Bilateral for average difference D. Unilateral for change in effectiveness
Help, please.
Ten individuals went on a low-fat diet for 12 weeks to lower their cholesterol. The data are recorded in the table below. Do you think that their cholesterol levels were significantly lowered? Conduct a hypothesis test at the 5% level. Starting cholesterol level Ending cholesterol level 170 170 220 230 110 120 240 220 200 190 180 150 190 200 360 300 280 300 260 240 i. State the distribution to use for the test. (Enter your answer in the form z or ta where df is the degrees of freedom.) What is the test statistic? (If using the z distribution round your answer to two decimal places, and if using the t distribution round your answer to three decimal places.) iil. ii. What is the p-value? (Round your answer to four decimal places.)
A factory owner has taken a sample (n = 20) of workers to see how many broken widgets each employee produces per day. For the following data, construct a frequency distribution table. Include columns for observed value (Xcat), frequency, proportion, and percent. 2 1 0 2 1 0 7 3 8 0 1 5 0 0 9 2 0 1 3 0
A survey was conducted on unauthorized use of computer systems. One of the survey questions asked respondents to indicate the percentage of monetary losses attributable to malicious actions by individuals within the organization. The histogram below summarizes the data for the 121 firms who experienced some monetary loss due to malicious insider actions. a. Which measurement class contains the highest proportion of respondents? Answer 5 Question 1 b. What is the approximate proportion of the 121 organizations that reported a monetary loss (%) from malicious inside actions less than 20%? Answer 6 Question 1 c. What is the approximate proportion of the 121 organizations that reported a percentage monetary loss from malicious inside actions greater than 60%? Answer 7 Question 1