A hospital director is told that 55% of the treated patients are insured. The director wants to test the claim that the percentage of insured patients is less than theexpected percentage. A sample of 310 patients found that 155 were insured. At the 0.02 level, is there enough evidence to support the director's claim?AnswerThere is sufficient evidence to support the claim that the percentage of insured patients is less than 55 % .○ There is not sufficient evidence to support the claim that the percentage of insured patients is less than 55 %.TablesKeypadKeyboard Shortcuts

The objective of this question is to test the claim that the percentage of insured patients is less…

Answered: A hospital director is told that 55% of…

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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Researchers claimed that women exercise at the same proportion as men do. To test this claim, a random sample is gathered. Of the 65 women sampled, 42 of them exercised. Of the 75 men sampled, 44 of them exercised. Test the claim with 0.01 level of significance.
that this percentage is different in Orange County. To test this, he randomly selects 120 people living in Orange County who are 25 or older and finds that 48 of them have been arrested. Test the police officer's claim at the a=0.05 level of significance, According to a 2015 article, 37% of Americans aged 25 years or older have been arrested. An Orange County police officer feels Write your answer in the following form P-Value, Conclusion Example: 0.15, There is not sufficient evidence that the mean weight of pandas is less than 200 pounds. Edit View Insert Format Tools Table 12pt v Paragraph v BIUA e To v O words ľ Vw. 96 5 E F\ G B 2N
3. The population of male industrial workers in London who have never experienced a major coro- nary event has mean systolic blood pressure 136 mm Hg and mean diastolic blood pressure 84 mm Hg.- You might be interested in determining whether these values are the same as those for the popula- tion of industrial workers who have suffered a coronary event. (a) A sample of 86 workers who have experienced a major coronary event has mean systolic blood pressure xs 143 mm Hg and standard deviation s, = 24.4 mm Hg. Test the null hypothesis that the mean systolic blood pressure for the population of industrial workers who have experienced such an event is identical to the mean for the workers who have not, using a two-sided test at the a = 0.10 level. (b) The same sample of men has mean diastolic blood pressure x deviation sd 87 mm Hg and standard 16.0 mm Hg. Test the null hypothesis that the mean diastolic blood pressure for the population of workers who have experienced a major coronary event…
A research center claims that at least 23% of adults think their taxes will be audited. A random sample of 900 adults 18% say they are concerned they will be audited. a= 0.05. Is there enough evidence to reject the claim?
A company claims that only 4% of their products are defective. A random sample of 320 products is selected from a shipment of 8000 products and the proportion of defects is computed. 23. What might you conclude about the company's claim that only 4% of their products are defective?
The proportion of Americans who have frequent migraines is 15.2% according to the CDC. An acupuncturist claims that her treatment can reduce this figure significantly. A random sample of 136 Americans is administered the acupuncturists treatment and 14 report experiencing migraines.a. State Hypotheses to the scenario using the correct symbols. b.What is the sample proportion? (Round to 2 decimal places) ˆpp^= c. Suppose the P-value is calculated to be 0.0144What would your decision be for this test using α=α= 0.10? Accept the null, fail to reject the null or reject the null d. Write a conclusion in terms of the acupuncturist's claim. Use the model provided by the instructor. Assume no errors were made.
E Tnfanticide an ove... In a certain school district, it was observed that 25% of the students in the element schools were classified as only children (no siblings). However, in the special program for talented and gifted children, 107 out of 336 students are only children. The school district administrators want to know if the proportion of only children in the special program is significantly different from the proportion for the school district. Test at the a 0.02 level of significance. What is the hypothesized population proportion for this test? (Report answer as a decimal accurate to 2 decimal places. Do not report using the percent symbol.) Based on the statement of this problem, how many tails would this hypothesis test have? O one-tailed test O two-tailed test Choose the correct pair of hypotheses for this situation: (A) (B) (C) Ho:p = 0.25 H:p 0.25 0.25 (D) (E) (F) 0.318 Ho:p Ha:p < 0.318 H:p# 0.318 Ha:p Ho:P 0.318 Ho:p 0.318 0.318 (A) (B) (C) (D) (E) (F) Using the normal…
The proportion of Americans who have frequent migraines is 15.2% according to the CDC. An acupuncturist claims that her treatment can reduce this figure significantly. A random sample of 260 Americans is administered the acupuncturists treatment and 31 report experiencing migraines.a. State Hypotheses to the scenario using the correct symbols. b. What is the sample proportion? (Round to 2 decimal places) ˆpp^=c. Suppose the P-value is calculated to be 0.0427What would your decision be for this test using α=α= 0.05? fail to reject the null reject the null accept the null Write a conclusion in terms of the acupuncturist's claim. Use the model provided by the instructor. Assume no errors were made.
Homa An education researcher claims that 60% of college students work year-round. In a random sample of 300 college students, 180 say they work year-round. Al a=0.05, is there enough evidence to reject the researcher's claim? Complete parts (a) through (e) below. O C. Atleast % of college students work year-round. book OD. The percentage of college students who work year-round is not %. cer Contents Let p be the population proportion of successes, where a success is a college student who works year-round. State Ho and H. Select the correct choice below and fill in the answer boxes to complete your choice. (Round to two decimal places as needed.) O A. Ho p# GB. H, p=0.60 media Library OC. Ho P Plan OF. Ho ps H, p Tor Success (b) Find the critical value(s) and identify the rejection region(s). sible Resources Identify the critical value(s) for this test. for Success %3D (Round to two decimal places as needed. Use a comma to separate answers as needed.) Clear all Check answer View an…
OBFW Publishers A state's Division of Motor Vehicles (DMV) claims that 60% of all teens pass their driving test on the first attempt. An investigative reporter examines an SRS of the DMV records for 125 teens; 86 of them passed the test on their first try. A hypothesis test of Ho: P = 0.60 Ha:p # 0.60 where p = the true proportion of teens who pass their driving test on the first attempt using a = 0.05 gives a P-value of 0.0444. A 95% confidence interval for the true proportion of teens who pass the driving test on the first attempt is 0.607 to 0.769. Which is the following statements is not true with regards to the 95% confidence interval provided and the result of the hypothesis test? OA two-sided test only allows us to reject (or fail to reject) a hypothesized value for a particular population parameter. The value 0.60 is not a plausible value because it falls outside the 95% confidence interval. The 95% confidence interval provided gives an approximate set of po's that would not be…
Is what I have here already correct? And how should I word the second part of the of the question?
Please answer all questions fully: Are you an impulse shopper? A survey of 600 grocery shoppers indicated that 62% of males and 51% of females make an impulse purchase every time they shop. Assume that the survey consisted of 300 males and 300 females. a. At the 0.05 level of significance, is there evidence of a difference in the proportion of males and females who make an impulse purchase every time they shop? b. Find the p-value and interpret its meaning.

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