2.2)240: Applied StatisticsDZI Module FivStatistics home > 6.2: Confidence intervals for population meanszyBookCHALLENGE6.2.1: Confidence intervals for population means.ACTIVITY389226.2543846.qx3zqy7Jump to level 1The additional growth of plants in one week are recorded for 11 plants with asample standard deviation of 4 inches and sample mean of 8 inches.t* at the 0.10 significance level = Ex: 1.234%3DMargin of error = Ex: 1.234Confidence interval = [ Ex: 12.345 Ex: 12.345 1[smaller value, larger value]CheckNextFeedback?2: Relating confidence intervals to hypothesis testing (one sample).o level 1naker is interested in information about how long transmissions last. A sample of transmissions are runy and the number of miles before the transmission fails is recorded. The auto maker claims that thesions can run constantly for over 150,000 miles before failure. The results of the sample are given below.

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Answered: The additional growth of plants in one…

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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WebAssign -→ xC OD Let x represent the number of mountain dimbers killed each year. The long term variance of x is approximately o= 136.2. Suppose that for the past 7 years, the vanance has been sE 110.6. Use a 1% level of significance to test the daim that the recent variance for number of mountain cimber deaths is less than 136.2., Find a 90% confidence interval for the population variance (a) What is the level of significance? State the null and alternate hypotheses. O Ho: a- 136.2; Hi o > 136.2 O Ho: - 136.2; Hạ o < 136.2 OHại o- 136.2; H o 136.2 O Hại a < 136.2; H o 136.2 (b) Find the value of the dhl-square statistic for the sample. (Round your answer to two decimal places.) What are the degrees of freedom? What assumptions are you making about the original distribution We assume a normal population distribution. We assume a binomial population distribution We assume a esponential population distribution We assume a uniform population distribution () Find or estimate the PyValue…
A particular brand of tires claims that its deluxe tire averages at least 50,000 miles before it needs to be replaced. From past studies of this tire, the standard deviation is known to be 8,000. A survey of owners of that tire design is conducted. Of the 30 tires surveyed, the mean lifespan was 45,900 miles with a standard deviation of 9,800 miles. Using alpha = 0.05, is the data highly consistent with the claim? A-State the distribution to use for the test. (Round your answers to two decimal places.) B-What is the test statistic? (If using the z distribution round your answers to two decimal places, and if using the t distribution round your answers to three decimal places.) C-What is the p-value? (Round your answer to four decimal places.) D-Indicate the correct decision ("reject" or "do not reject" the null hypothesis), the reason for it, and write an appropriate conclusion. (i) Alpha (Enter an exact number as an integer, fraction, or decimal.) E-
A random sample of size 100 is taken from a normal distribution population with sigmma=5.3 . give that the sample mean is x bar =21.8 construct a 98 % confidence interval for the position mean mu.( Round to two decimals)
Facebook: A study showed that two years ago, the mean time spent per visit to Facebook was 20.8 minutes. Assume the standard deviation is a=8.0 minutes. Suppose that a simple random sample of 107 visits was selected this year and has a sample mean ofx18.8 minutes. A social scientist is interestec to know whether the mean time of Facebook visits has decreased. Use the a =0.10 level of significance and the critical value method with the table. (a) State the appropriate null and alternate hypotheses. (b) Compute the value of the test statistic. (c) State a conclusion. Use the u =0.10 level of significance. Part: 0/5 Part 1 of 5 (a) State the null and alternate hypotheses. D-0 This hypothesis test is a (Choose one) v test. noht-talled
The additional growth of plants in one week are recorded for 11 plants with a sample standard deviation of 3 inches and sample mean of 8 inches. t∗ at the 0.10 significance level = Margin of error = Confidence interval = [ , ] [smaller value, larger value]
A random sample of 16 men was selected from the population of ISU students. The sample's average BMI value was 22.5 with a standard deviation of 4.8. Create a 99% confidence interval for the mean of the population of male student. I DFocus W
The additional growth of plants in one week are recorded for 6 plants with a sample standard deviation of 1 inches and sample mean of 12 inches. t∗ at the 0.10 significance level = Margin of error = Confidence interval = [ , ] [smaller value, larger value]
A sample of 50 lenses used in eyeglasses yields a sample mean thickness of 3.07 mm and a sample standard deviation of 0.36 mm. The desired true average thickness of such lenses is 3.20 mm. Does the data strongly suggest that the true average thickness of such lenses is something other than what is desired? Test using alpha of 0.05. what is the result of the test
A manufacturer of TV tubes has for many years used a process giving a meantube life of 4700 hours and a standard deviation of 1460 hours. A new process is tried to see if it will increase the life significantly. A sample of 100new tubes gave a mean life of 5000 hours. Is the new process better than the old one at a 1% level of significance?
The additional growth of plants in one week are recorded for 11 plants with a sample standard deviation of 1 inches and sample mean of 11 inches.
A sample of 14 male college students consumes an average of 14.3 gallons of beer per month, with a sample standard deviation of 5.2 gallons. You can safely assume that the population of monthly beer consumption is Normally distributed. What is the margin of error for a 90% Confidence Interval for the mean? (Leave your answer to two decimal places, ex: 18.12)
The level of calciumin the blood of healthy young adults follows aNormal distributionwithmean μ = 10milligrams per deciliter and standard deviation = 0.4. A clinicmeasures theblood calcium of 100 healthy pregnant young women at their first visit for prenatal care.The mean of these 100 measurements is ¯ x = 9.8. Is this evidence that the mean calciumlevel in the population of healthy pregnant young women is less than 10? To answer this,test the hypotheses H0 : μ = 10 versus Ha : μ < 10 at the 5% significance level.(a) What is the value of the P-value?(b) Determine which of the following statements is true.• H0 should be rejected.• H0 should not be rejected.• Ha should be rejected.• There is a 5% chance that the null hypothesis is true.

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