From previous studies, it is concluded that 50% of phone numbers in a certain city are unlisted. Aresearcher claims that the proportion is smaller than 50% and decides to survey 300 working adults.Test the researcher's claim at the a = : 0.10 significance level.Preliminary:a. Is it safe to assume that n ≤ 0.05 of all subjects in the population?Ο NoYesb. Verify np(1 - p) ≥ 10. Round your answer to one decimal place.np(1 − p) ==Test the claim:a. The null and alternative hypotheses areHo: p = 0.5Ha:p = 0.5=0.5Ο Ηo:μHa: μ + 0.5Ho:μ < 0.5Ha: μ > 0.5Ho:p> 0.5Ha:p < 0.5O Ho: p ≤ 0.5Ha:p> 0.5Ο Ηo : μ 2 0.5Ha: μ < 0.5:μ< b. The test isSelect an answer ✓c. Based on the sample of 300 people, 46% phone numbers in a certain city are unlisted. What isthe test statistic? Round your answer to two decimal places.?d. What is the p-value? Round your answer to four decimal places.e. Make a decision.Do not reject the null hypothesis.O Reject the null hypothesis.f. Make a conclusion.O There is not sufficient evidence that the proportion of people who phone numbers in acertain city are unlisted is smaller than 50% at the a = 0.10 significance level.O There is sufficient evidence that the proportion of people who phone numbers in acertain city are unlisted is smaller than 50% at the a 0.10 significance level.-

From the provided information, Sample size (n) = 300 Population proportion (p) = 0.50 Level of…

Answered: From previous studies, it is concluded…

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

The City of South Lake Tahoe, CA, has an Asian population of 1,419 people, out of a total population of 23,609. Suppose that a survey of 1,419 self-reported Asians in the Manhattan, NY, area yielded the data in Table 11.33. Conduct a goodness-of-fit test to determine if the self-reported sub-groups of Asians in the Manhattan area fit that of the Lake Tahoe area. Use 0.05 significant level. Race Lake Tahoe Frequency Manhattan Frequency Asian Indian 131 174 Chinese 118 557 Filipino 1,045 518 Japanese 80 54 Korean 12 29 Vietnamese 9 21 Other 24 66 Write the null and alternate hypotheses.
1
In each graph, the shaded region represents the P-value of a hypothesis test. Find the P-value, given that the Standardized Test Statistic is Z = - 1.1. Round to 4 decimals a. -4 -3 -2 -1 3 4 b. -4 -3 -2 -1 1 1 3. Submit Question MacBook Air 2.
The City of South Lake Tahoe, CA, has an Asian population of 1,419 people, out of a total population of 23,609. Suppose that a survey of 1,419 self-reported Asians in the Manhattan, NY, area yielded the data in Table 11.33. Conduct a goodness-of-fit test to determine if the self-reported sub-groups of Asians in the Manhattan area fit that of the Lake Tahoe area. Use 0.05 significant level. Race Lake Tahoe Frequency Manhattan Frequency Asian Indian 131 174 Chinese 118 557 Filipino 1,045 518 Japanese 80 54 Korean 12 29 Vietnamese 9 21 Other 24 66 What is the Chi Square critical value (hint: use Chi S
Suppose a research study uses two independent groups with 31 participants in each group. If a t-test analysis produces a calculated value of t of 2.22, which of the following is the correct decision? A. At the .05 level of significance, reject the null hypothesisB. At the .05 level of significance, fail to reject the null hypothesisC. At the .01 level of significance, reject the null hypothesisD. Impossible to answer without additional information
When dragons on the fictional planet Pern lay eggs, the eggs are either green or yellow. The biologists have observed over the years that 32% of the eggs are yellow, and the rest green. Next spring the lead scientist has permission to randomly select 48 of the dragon eggs to incubate. Consider all the possible samples of 48 dragon eggs. Round answers to 4 decimal places. a) Compute the mean number of yellow eggs in samples of 48 eggs? (that is the same as asking for the expected value of the number of yellow eggs)mean = b) Compute the standard deviation in the number of yellow eggs in samples of size 48?standard deviation = c) Compute the variance in the number of yellow eggs in samples of size 48?variance =
Which of the following claims would result in a Left tail test? O A. Claim: The average heart rate for exercisers is lower than the average heart rate for nonexercisers. B. Claim The variation in the grades of the Final Exam are different than previously (which was 2.3). O C. Claim: The proportion of people with pets is over 75%. OD. Claim: The average age of voters in Clarke County is not 45 years.
The National Highway Traffic Safety Administration reported the percentage of traffic accidents occurring each day of the week. Assume that a sample of 420 accidents provided the following data. Sunday Monday Tuesday Wednesday Thursday Friday Saturday 66 80 50 53 O Ho: Psun PMon PTue #Pwed * PThu * PFri * Psat * # # H₂: All proportions are equal. 48 (a) Conduct a hypothesis test to determine if the proportion of traffic accidents is the same for each day of the week. Use a 0.05 level of significance. State the null and alternative hypotheses. Ho: : Not all proportions are equal. H₂: Psun * PMon * PTue * Pwed * PThu * PFri * Psat */ OH: Not all proportions are equal. Ha: Psun = PMon=PTue=Pwed=PThu = PFri = Pat = H₂ : Not all proportions are equal. = Ho: Psun PMon=PTue = Pwed=PThu Fri Sat = = 7 55 68 Find the p-value. (Round your answer to four decimal places.) p-value = Find the value of the test statistic. (Round your answer to three decimal places.) X State your conclusion. O Reject…
Researchers collected data on the numbers of hospital admissions resulting from motor vehicle crashes, and results are given below for Fridays on the 6th of a month and Fridays on the following 13th of the same month. Use a 0.05 significance level to test the claim that when the 13th day of a month falls on a Friday, the numbers of hospital admissions from motor vehicle crashes are not affected. Friday the 6th: Friday the 13th: 9. 7 11 11 4 5 0 13 13 13 10 6 12 What are the hypotheses for this test? Let Ha be the in the numbers of hospital admissions resulting from motor vehicle crashes for the population of all pairs of data. Ho: Hd H1: Hd Find the value of the test statistic. t = (Round to three decimal places as needed.) Identify the critical value(s). Select the correct choice below and fill the answer box within your choice. (Round to three decimal places as needed.) O A. The critical values are t= ± O B. The critical value is t = State the result of the test. Choose the correct…
You are given the following hypotheses:H0 : p = 0.9 HA : p not equal to 0.9 We know that the sample size is 1,429. For what sample proportion would the p-value be equal to 0.01? Assume that all conditions necessary for inference are satisﬁed
The null hypothesis and the alternate hypothesis are: H0: The frequencies are equal.H1: The frequencies are not equal. Category f0 A 10 B 10 C 20 D 10 a. State the decision rule, using the 0.01 significance level. (Round your answer to 3 decimal places.) b. Compute the value of chi-square. (Round your answer to 2 decimal place.) c. What is your decision regarding H0?
You wish to test the following claim (H.) at a significance level of a = 0.005. You believe both populations are normally distributed, but you do not know the standard deviations for either. And you have no reason to believe the variances of the two populations are equal You obtain a sample - 19.1 from the first population. 7.1 from of size ni 23 with a mean of a1 You obtain a sample of size n2 the second population. 86.6 and a standard deviation of s1 20 with a mean of r2 96.5 and a standard deviation of s2 = a. What is the test statistic for this sample? test statistic = Round to 3 decimal places. b. What is the p-value for this sample? For this calculation, use p-value Use Technology Round to 4 decimal places.

SEE MORE QUESTIONS

Recommended textbooks for you

A First Course in Probability (10th Edition)

Probability

ISBN:

9780134753119

Author:

Sheldon Ross

Publisher:

PEARSON

A First Course in Probability

Probability

ISBN:

9780321794772

Author:

Sheldon Ross

Publisher:

PEARSON

A First Course in Probability (10th Edition)

Probability

ISBN:

9780134753119

Author:

Sheldon Ross

Publisher:

PEARSON

A First Course in Probability

Probability

ISBN:

9780321794772

Author:

Sheldon Ross

Publisher:

PEARSON

SEE MORE TEXTBOOKS