Suppose we wish to calculate an 80% confidence interval. What would be the value of z in the confidence interval equationp(1-p)p ± ²√-? Use the z-score table to find it. Your answer should be correct to within 0.01. Your value of z should be positive.n

A confidence interval is wished to be calculated.The confidence interval equation: The value of z…

Answered: Suppose we wish to calculate an 80%…

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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5
D
Match the confidence level with the confidence interval for the population mean. Type the correct letter in each box. 1.± 1.645 2.1.282 √n 3.7±1.96) ( A. 95% B. 80% C. 90%
Urgent solution required round off to 2dp
The Louisville Parks Department found that 48% of visitors to parks brought food to the park back in 2005. Use these results below from #1 to see if that proportion has changed. Be sure to include appropriate hypotheses, the p-value, and your conclusions. E= 1.96 x √0.43x0.57/100 E = 0.097 95% CI is P ±E 0.43 ±0.097 = (0.333, 0.527)
The director of research and development is testing a new drug. She wants to know if there is evidence at the 0.05 level that the drug stays in the system for more than 357 minutes. For a sample of 19 patients, the mean time the drug stayed in the system was 364 minutes with a standard deviation of 25. Assume the population distribution is approximately normal. Step 1 of 7: State the null and alternative hypotheses Step 2 of 7: Find the value of the test statistic. Round your answer to two decimal places. Step 3 of 7: Specify if the test is one-tailed or two-tailed. Step 4 of 7: Determine the P-value of the test statistic. Round your answer to four decimal places. Step 5 of 7: Identify the value of the level of significance.
We use the t distribution to construct a confidence interval for the population mean when the underlying population standard deviation is not known. Under the assumption that the population is normally distributed, find tα/2,df for the following scenarios. (You may find it useful to reference the t table. Round your answers to 3 decimal places.) tα/2,df a. A 95% confidence level and a sample of 8 observations. b. A 90% confidence level and a sample of 8 observations. c. A 95% confidence level and a sample of 28 observations. d. A 90% confidence level and a sample of 28 observations.
Solve the given problem using mathematical procedure.
please check this. The recidivism rate for convicted sex offenders is 14%. A warden suspects that this percent is different if the sex offender is also a drug addict. Of the 324 convicted sex offenders who were also drug addicts, 32 of them became repeat offenders. What can be concluded at the αα = 0.05 level of significance? For this study, we should use The null and alternative hypotheses would be: Ho: (please enter a decimal) H1: (Please enter a decimal) 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 the populaton proportion is significantly different from 14% at αα = 0.05, so there is statistically significant evidence to conclude that the population proportion of convicted sex offender drug addicts who become repeat offenders…

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Suppose we wish to calculate an 80% confidence interval. What would be the value of z in the confidence interval equation ? Use the z-score table to find it. Your answer should be correct to within 0.01. Your value of z should be positive. p(1-p) p± √ n