llalearn.zybooks.comject One Submission -.D2L 6-2 Participation Activities: Con...Z 5.2 MAT 240: Applied StatisticsDZL. Module Iplied Statistics home > 6.2: Confidence intervals for population meansE zyBodCHALLENGE6.2.1: 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 12 inches.2t* at the 0.10 significance level = Ex: 1.234Margin of error = Ex: 1.234 :Confidence interval = [ Ex: 12.345Ex: 12.345 ]%3D[smaller value, larger value]CheckNextFeedback?GE6.2.2: Relating confidence intervals to hypothesis testing (one sample).3846 qx3zqy7Jump to level 1An auto maker is interested in information about how long transmissions last. A sample of transmissions are runconstantly and the number of miles before the transmission fails is recorded. The auto maker claims that thetransmissions can run constantly for over 150,000 miles before failure. The results of the sample are given below.

Given that Number of plants (n) = 11 Sample standard deviation (s) = 4 inches Sample mean (x¯) = 12…

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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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 sample is selected from a population withu = 50. After a treatment is administered to the 16 individuals in the sample, the mean is found to be M = 55 and the standard deviation is s = 8, What is the test statistic for the sample mean?
Q2: Serum amylase determinations were made on a sample of 15 apparently healthy subjects in the Electricity Power Plant of Nasriya January 2010. The sample yielded a mean of 96 and a standard deviation of 35 units/100ml. Estimate the true mean of serum amylase in the healthy population of Nasriya.
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 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 mean life expectancy in the US pop. is currently 81.1 years with a standard deviation of 15.9. A researcher examined the age of death of 70 people in Florida hospitals and the mean was 85.2 yrs. He runs a 2tailed test with a=.05 to see if FL has significantly different life expectancy to the overall US pop. Calculate the standard error, z statistic and critical z values from this information.
A synthetic fiber used in manufacturing carpet has tensile strength that is normally distributed with mean 75.5 psi and standard deviation 3.5 psi. How is the standard deviation of the sample mean changed when the sample size is increased from n = 5 to n = 52 Round all intermediate calculations to four decimal places (e.g. 12.3456) and round the final answer to three decimal places (e.g. 98.768). The standard deviation is by i psi. Štatistical Tables and Charts reduced increased
The weight of male babies less than 2 months old in the United States is normally distributed with mean 12.1 poundsand standard deviation 5.3. how are they working the problem to get 0.8224?
Suppose the mean weight of King Penguins found in an Antarctic colony last year was 15.4 kg. In a sample of 35 penguins same time this year in the same colony, the mean penguin weight is 14.6 kg. Assume the population standard deviation is 2.5 kg. At .05 significance level, can we reject the null hypothesis that the mean penguin weight does not differ from last year? Use P-value approach.
A manufacturer of bicycle tires has developed a new design that he claims has an average life span of 5 years with a standard deviation of 1.2 years. A dealer of the product claims that the average life span of 150 samples of the tires is only 3.5 years. Test the difference of the population and sample mean at 5% level of significance.
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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