Late payment of medical claims can add to the cost of health care. Suppose 71.7% of the claims were paid in fullwhen first submitted for one insurance company. The insurance company developed a new payment system in aneffort to increase this percentage. A sample of 280 claims processed under this system revealed that 223 of the claimswere paid in full when first submitted. Complete parts a and b below.a State the appropriate null and alternative hypotheses. Choose the correct answer below.OA. Ho p≤0.717HA P>0.717***OC. Ho p=0.717HA P#0717OB. Ho: z≤0.717HA: Z>0.717O D. Ho: p20.717HA: P<0.717

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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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Individuals filing federal income tax returns prior to March 31 received an average refund of $1056. Consider the population of “last-minute” filers who mail their tax return during the last five days of the income tax period (typically April 10 to April 15). A researcher suggest that a reason individuals wait until the last five days is that on average these individuals receive lower refunds than do early filers. Develop appropriate hypotheses such that rejection of will support the researcher’s contention. For a sample of 400 individuals who file a tax return between April 10 and April 15, the sample mean refund was $910. Based on prior experience a population standard deviation of o=1600 may be assumed. What is the p-value? At a=.05 , What is your conclusion?
A bank classifies its customer as either good or bad credit risks. Based on historical data, the bank observed that 1% of good credit risks and 10% of bad credit risks are late in paying their loan in any given month. A new customer was approved for a loan at this bank. From the credit agency checking, the bank believes that there is a 70% chance the customer will turn out to be a good credit risk.
Consumers Energy states that the average electric bill across the state is $60.07. You want to test the claim that the average bill amount is actually greater than $60.07. What are the appropriate hypotheses for this test? Question 12 options: 1) HO: μ ≥ 60.07HA: μ < 60.07 2) HO: μ = 60.07HA: μ ≠ 60.07 3) HO: μ > 60.07HA: μ ≤ 60.07 4) HO: μ ≤ 60.07HA: μ > 60.07 5) HO: μ < 60.07HA: μ ≥ 60.07
Individuals filing federal income tax returns prior to March 31 received an average refund of $1,071. Consider the population of "last-minute" filers who mail their tax return during the last five days of the income tax period (typically April 10 to April 15).
R1
To gauge how her fellow lawmakers view the proposed “Child Car Seat" Law, 12 randomly selected members of the house were interviewed. Ten of them were supporting the proposed law. Is there evidence to say that the majority of the members of the house will approve the said proposal? Which of the following statements is(are) TRUE? * I. The appropriate alternative hypothesis is the proportion of the O members of the house that will approve the proposal is less than 50%. II. Approximate Z-test can be performed as a test procedure. O Both I and II O Neither I nor II
State the null and alternative hypothesis.In the maputi cotton factory, the employees want to confirm the news on the increase of their gross salary (U) to 700 pesos.
A company manufacturing computer chips finds that 9% of all chips manufactured are defective. Management is concerned that employee inattention is partially responsible for the high defect rate. In an effort to decrease the percentage of defective chips, management decides to offer incentives to employees who have lower defect rates on their shifts. The incentive program is instituted for one month. If successful, the company will continue with the incentive program. a. Write the company's null and alternative hypotheses. Make sure to include the correct parameter, sign and number.Ho: H1: b. In this context describe a Type I error and the impact such an error would have on the company. Management thinks the incentive program was effective, when in fact it did not lower the defective rate from 9%. Management thinks the incentive program did not work, when in fact it did lower the defective rate from 9%. c. In this context describe a Type II error and the impact such an error…
Individuals filing federal income tax returns prior to March 31 received an average refund of $1,051. Consider the population of "last-minute" filers who mail their tax return during the last five days of the income tax period (typically April 10 to April 15). (a) A researcher suggests that a reason individuals wait until the last five days is that on average these individuals receive lower refunds than do early filers. Develop appropriate hypotheses such that rejection of H0 will support the researcher's contention. H0: μ > $1,051, Ha: μ ≤ $1,051 H0: μ = $1,051, Ha: μ ≠ $1,051 H0: μ ≥ $1,051, Ha: μ < $1,051 H0: μ ≤ $1,051, Ha: μ > $1,051 H0: μ < $1,051, Ha: μ ≥ $1,051 (b)For a sample of 400 individuals who filed a tax return between April 10 and 15, the sample mean refund was $910. Based on prior experience, a population standard deviation of σ = $1,600 may be assumed. What is the test statistic? (Round your answer to two decimal places.) What is the…
In a random sample of 200 auditors, 104 agreed to some extent with the following statement: "Cash flow is an important indicator of profitability". Consider the null hypothesis that at least half of the members of this population would agree with this statement. When testing this hypothesis, the p-value was found to be 0.2858. According to this value, what decision would you make regarding whether or not to reject the null hypothesis. Write clearly the hypotheses of this problem.
Independent studies show that 26 out of 40 r/s full-time students favor a shorter semester system, while 38 out of 50 r/s part-time students favor the same. Construct a 98% c.i. for the difference between the overall percentage of full-time students favoring a shorter semester system and that of part-time students.
1. An insurance company states that 70% of its claims are settled within 60 days. A consumer group selected a random sample of 85 of the company's claims to test this statement. If the consumer group found that 65 of the claims were settled within 60 days, do they have sufficient reason to support their contention that fewer than 70% of the claims are settled within 60 days? Use 5% level of significance. Step 1: State the hypotheses. Step 2: The level of significance, one/two-tailed test, degrees of freedom Step 3: Statistical Test Step 4: Computation Step 5: Decision Rule Step 6: Reject Ho or Failed to Reject Ho Step 7: Conclusion

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