In a survey, 38% of the respondents stated that they talk to their pets on the telephone. A veterinarian believed this result to be too high, so he randomly selected 160 pet owners and discovered that 56 of them spoke to their pet on the telephone. Does the veterinarian have a rightto be skeptical? Use the x = 0.01 level of significance.Click here to view the standard normal distribution table (page 1).Click here to view the standard normal distribution table (page 2).Because npo (1-Po):10, the sample size is(Round to one decimal place as needed.)=5% of the population size, and the samplethe requirements for testing the hypothesissatisfied.

Answered: In a survey, 38% of the respondents…

MATLAB: An Introduction with Applications

6th Edition

ISBN:9781119256830

Author:Amos Gilat

Publisher:Amos Gilat

Chapter1: Starting With Matlab

Section: Chapter Questions

Problem 1P

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A vending machine is designed to dispense a mean of 7.7 oz of coffee into an 8-oz cup. If the standard deviation of the amount of coffee dispensed is 0.2 oz and the amount is normally distributed, determine the percent of times the machine will dispense more than 7.3 oz. Click here to view page 1 of the standard normal distribution table. Click here to view page 2 of the standard normal distribution table. % of the time the machine will dispense more than 7.3 oz. (Type an integer or decimal rounded to two decimal places as needed.) Q hp SAVE NU O I Next Show D 8/
According to the Carnegie unit system, the recommended number of hours students should study per unit is 2. Are statistics students' study hours less than the recommended number of hours per unit? The data show the results of a survey of 11 statistics students who were asked how many hours per unit they studied. Assume a normal distribution for the population. 1, 0.3, 2.7, 0.5, 1.8, 2.2, 2.5, 0, 0.9, 0.2, 2 What can be concluded at the � = 0.01 level of significance? For this study, we should use The null and alternative hypotheses would be: �0: �1: The test statistic = (please show your answer to 3 decimal places.) The p-value = (Please show your answer to 4 decimal places.) The p-value is � Based on this, we should the null hypothesis. Thus, the final conclusion is that ... The data suggest that the population mean study time per unit for statistics students is not significantly less than 2 at � = 0.01, so there is…
Twenty years ago, 54% of parents of children in high school felt it was a serious problem that high school students were not being taught enough math and science. A recent survey found that 356 of 900 parents of children in high school felt it was a serious problem that high school students were not being taught enough math and science. Do parents feel differently today than they did twenty years ago? Use the a = 0.1 level of significance. Click here to view the standard normal distribution table (page 1). Click here to view the standard normal distribution table (page 2). Because npo (1- Po) =O 10, the sample size is V 5% of the population size, and the sample the requirements for testing the hypothesis v satisfied. (Round to one decimal place as needed.) Standard Normal Distribution Table (page 1) Area Standard Normal Distribution 0.03 ま 0.00 0.01 0.02 0.04 0.05 0.06 0.07 0.08 0,09 0.0003 0.0005 0.0007 0.0010 0.0003 0.0005 0.0007 0.0009 0.0013 0.0003 0.0005 0.0006 0.0003 0.0004…
According to a survey in a country, 31% of adults do not own a credit card. Suppose a simple random sample of 800 adults is obtained. Complete parts (a) through (d) below. Click here to view the standard normal distribution table (page 1). Click here to view the standard normal distribution table (page 2). .... (a) Describe the sampling distribution of p, the sample proportion of adults who do not own a credit card. Choose the phrase that best describes the shape of the sampling distribution of p below. O A. Not normal because ns 0.05N and np(1 - p) 10 O D. Approximately normal because ns 0.05N and np(1 - p) < 10 Determine the mean of the sampling distribution of p. (Round to two decimal places as needed.) Determine the standard deviation of the sampling distribution of p. (Round to three decimal places as needed.) (b) What is the probability that in a random sample of 800 adults, more than 34% do not own a credit card? The probability is (Round to four decimal places as needed.)…
In 1945, an organization asked 1511 randomly sampled American citizens, "Do you think we can develop a way to protect ourselves from atomic bombs in case others tried to use them against us?" with 795 responding yes. Did a majority of the citizens feel the country could develop a way to protect itself from atomic bombs in 1945? Use the a = 0.01 level of significance. Click here to view the standard normal distribution table (page 1). Click here to view the standard normal distribution table (page 2). ..... What are the null and alternative hypotheses? 0.5 versus H;: p Ho: p (Type integers or decimals. Do not round.) > 0.5 Determine the test statistic, zo- Zo = 2.02 (Round to two decimal places as needed.) Determine the critical value(s). Select the correct choice below and fill in the answer box to complete your choice. (Round to two decimal places as needed.) A. The critical values are ± O B. The critical value is
According to the Carnegie unit system, the recommended number of hours students should study per unit is 2. Are statistics students' study hours different from the recommended number of hours per unit? The data show the results of a survey of 15 statistics students who were asked how many hours per unit they studied. Assume a normal distribution for the population. 1.7, 3.7, 1.6, 0.8, 4.6, 3.7, 4.2, 1.1, 0.7, 2.5, 2.5, 2.8, 3.8, 1.7, 3.7 What can be concluded at the αα = 0.10 level of significance? The null and alternative hypotheses would be: Please provide number H0:H0: mean = __?___ H1:H1: mean not equal to __?__ The test statistic t= __?__ (please show your answer to 3 decimal places.) The p-value = __?__ (Please show your answer to 4 decimal places.)
According to a survey in a country, 21% of adults do not own a credit card. Suppose a simple random sample of 200 adults is obtained. Complete parts (a) through (d) below. Click here to view the standard normal distribution table (page 1). Click here to view the standard normal distribution table (page 2). (a) Describe the sampling distribution of p, the sample proportion of adults who do not own a credit card. Choose the phrase that best describes the shape of the sampling distribution of p below. O A. Not normal because ns0.05N and np(1 - p) 2 10 B. Approximately normal because ns0.05N and np(1- p) 2 10 O C. Not normal because ns0.05N and np(1 - p) < 10 O D. Approximately normal because ns0.05N and np(1- p) < 10 Determine the mean of the sampling distribution of p. Ha = 0.21 (Round to two decimal places as needed.) Determine the standard deviation of the sampling distribution of p. GA = 0.029 (Round to three decimal places as needed.) (b) What is the probability that in a random…
According to the Carnegie unit system, the recommended number of hours students should study per unit is 2. Are statistics students' study hours more than the recommended number of hours per unit? The data show the results of a survey of 15 statistics students who were asked how many hours per unit they studied. Assume a normal distribution for the population. 0.7, 4.1, 0.6, 4.4, 3.2, 0.8, 3.1, 3.8, 1.1, 3.3, 2.1, 1.5, 2.5, 2.3, 1.7 What can be concluded at the αα = 0.01 level of significance? For this study, we should use The null and alternative hypotheses would be: H0:H0: H1:H1: The test statistic = (please show your answer to 3 decimal places.) The p-value = (Please show your answer to 4 decimal places.) The p-value is αα Based on this, we should the null hypothesis. Thus, the final conclusion is that ... The data suggest that the population mean study time per unit for statistics students is not significantly more…
The amounts (in oz) in cans of soda are given below. The cans are labeled to indicate that the contents are 12 oz of soda. Use a 0.05 significance level to test the claim that the cans are filled so that the median amount is 12 oz. If the median is not 12 oz, are consumers being cheated? Click the icon to view the data table. Click here to view page one of the standard normal distribution table. Click here to view page two of the standard normal distribution table. First define the null and alternative hypotheses. H₂: H₁: Calculate the Wilcoxon test statistic. ▼ T= Since the sample size n is greater than 30, convert T to a z test statistic. Z= (Round to two decimal places as needed.) Determine the critical value(s). The critical value(s) is/are (Round to two decimal places as needed. Use a comma to separate answers as needed.) Choose the correct answer below. O A. Fail to reject Ho. There is sufficient evidence to warrant rejection of the claim that the median amount of soda is 12.0…
Find the 56th percentile of the standard normal distribution.
In an advertising campaign, a snack company claimed that every 18-ounce bag of its cookies contained at least 1000 chocolate chips. Two statisticians attempted to verify the claim. The accompanying data represent the number of chips in an 18-ounce bag of the company's cookies based on their study. Complete parts (a) through (e). Click here to view the chocolate chip data table Click here to view the standard normal distribution table (page 1). Click here to view the standard normal distribution table (page 2). (a) Draw a normal probability plot to determine if the data could have come from a normal distribution. Choose the correct plot below. O A. Expected z-score 2.5- 0- -2.5- poppe 1000 1300 1600 Observed value Q 2 - OB. Expected z-score 2.5- 0- co -2.5 1000 mocn 1300 1600 Observed value Q G Expected z-score C. 2.5- 0- -2.5- 1000 27 1300 1600 Observed value Q oo Q OD. Expected z-score 2.5 0- -254 1000 1300 1600 Observed value Q N
In 1945, an organization asked 1421 randomly sampled American citizens, "Do you think we can develop a way to protect ourselves from atomic bombs in case others tried to use them against us?" with 744 responding yes. Did a majority of the citizens feel the country could develop a way to protect itself from atomic bombs in 1945? Use the a = 0.05 level of significance. Click here to view the standard normal distribution table (page 1). Click here to view the standard normal distribution table (page 2). What are the null and alternative hypotheses? Ho: versus H1: (Type integers or decimals. Do not round.) Determine the test statistic, Zo. Zo (Round to two decimal places as needed.) %3D Determine the critical value(s). Select the correct choice below and fill in the answer box to complete your choice. (Round to two decimal places as needed.) A. The critical value is B. The critical values are ± What is the correct conclusion at the a = 0.05 level of significance? Since the test statistic…

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