Part 3 of 5(c) Compute the P-value. Round the answer to four decimal places.P-value=Part: 3 / 5Part 4 of 5(d) Determine whether to reject H. Use the a=0.01 level of significance.(Choose one) Ho at the a=0.01 level.Part: 4 / 5×Part 5 of 5(e) State a conclusion.There (Choose one)ŚXŚenough evidence to conclude that the mean time browsing Netflix has increased. Netflix: A study conducted by a technology company showed that the mean time spent per day browsing the video streaming service Netflix for something towatch was 20.6 minutes. Assume the standard deviation is o=7. Suppose a simple random sample of 109 visits taken this year has a sample mean of x = 21.6minutes. A social scientist is interested to know whether the mean time browsing Netflix has increased. Use the a=0.01 level of significance and the P-valuemethod with the TI-84 Plus calculator.Part: 0 / 5Part 1 of 5(a) State the appropriate null and alternate hypotheses.Ho:H₁:This hypothesis test is a (Choose one) test.Part: 1 / 5Part 2 of 5Z=XO

Sample size (n)=109Sample mean =21.6Population mean =20.6Standard deviation =7Test hypothesis: Claim…

Answered: Netflix: A study conducted by a…

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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Cardiac pacemaker batteries will stop working if they are not properly calibrated and charged. Suppose that the length of time a battery operates follows a normal distribution with mean 25.0 days and standard deviation 2.0 days. At what point will 1% of the batteries will fail?
Are low-fat diets or low-carb diets more effective for weight loss? A sample of 61 subjects went on a low-carbohydrate diet for six months. At the end of that time, the sample mean weight loss was 2.1 kilograms with a sample standard deviation of 4.71 kilograms. A second sample of 63 subjects went on a low-fat diet. Their sample mean weight loss was 3.7 kilograms with a standard deviation of 5.67 kilograms. Can you conclude that the mean weight loss of subjects having low-carb diets is less than the mean weight loss of subjects having low-fat diets? Let μ1 denote the mean weight loss on the low-carb diet and μ2 denote the mean weight loss on the low-fat diet. Use the =α0.05 level and the critical value method. 1) State the appropriate null and alternate hypotheses. 2)Choose a significance level and find the critical value. 3)Compute the test statistic. To compute the test statistic, we use the formula 4)Determine whether to reject H0.
Say that an extraversion scale has a population mean of 40 and a standard deviation of 10. About what percent of extraversion scores fall between 30 and 50?
A manufacturer claims that the mean lifetime of its lithium batteries is 1400 hours. A homeowner selects 35 of these batteries and fınds the mean lifetime to be 1370 hours with a standard deviation of 70 hours. Test the manufacturer's claim. Use a = =0.05. Test Statistic Round to thousandths place. %3D P-Value = Round to thousandths place. Decision: Write 'Reject' or 'Fail to Reject'
The shelf life of a battery produced by one major company is known to be Normally distributed, with a mean life of 3.5 years and a standard deviation of 0.75 years. What is the upper quartile of battery shelf life? Use the fact that the middle 50% of the data falls within 0.67 standard deviations from the mean.
In a school district, all sixth grade students take the same standardized test. The superintendant of the school district takes a random sample of 30 scores from all of the students who took the test. She sees that the mean score is 169 with a standard deviation of 7.0674. The superintendant wants to know if the standard deviation has changed this year. Previously, the population standard deviation was 13. Is there evidence that the standard deviation of test scores has decreased at the α=0.005 level? Assume the population is normally distributed. Step 4: Make a decision. Is it reject Null hypothesis or Fail to reject Null hypothesis? Step 5: What is the conclusion? Is there sufficient evidence or there is not sufficient evidence to show that the standard deviation of the test scores has decreased?
Times for a surgical procedure are normally distributed. There are two methods. Method A has a mean of 35 minutes and a standard deviation of 3 minutes, while method B has a mean of 39 minutes and a standard deviation of 1.5 minutes. Which procedure is preferred if the procedure must be completed within 34 minutes? Which procedure is preferred if the procedure must be completed within 40.0 minutes? Which procedure is preferred if the procedure must be completed within 43 minutes?
Average adult Americans are about one inch taller but nearly a whopping 25 pounds heavier than they were in 1960, according to a report from the Centers for Disease Control and Prevention (CDC). City A is considered one of America's healthiest cities. Is the weight gain since 1960 similar in city A? A sample of n=25 adults suggested a mean increase of 22 pounds with a standard deviation of 9.4 pounds. Is City A significantly different in terms of weight gain since 1960? Complete and interpret 5 step hypothesis testing by hand at a 5% level of significance using a Z-test. Show each step and your work.
A random sample of 47 cars in the drive-thru of a popular fast food restaurant revealed an average bill of $17.51 per car. The population standard deviation is $6.05. Estimate the mean bill for all cars from the drive thru with 91% confidence.
Bone mineral density (BMD) is a measure of bone strength. Studies show that BMD declines after age 45. The impact of exercise may increase BMD. A random sample of 59 women between the ages of 41 and 45 with no major health problems were studied. The women were classified into one of two groups based upon their level of exercise activity: walking women and sedentary women. The 39 women who walked regularly had a mean BMD of 5.96 with a standard deviation of 1.22. The 20 women who are sedentary had a mean BMD of 4.41 with a standard deviation of 1.02. Which of the following inference procedures could be used to estimate the difference in the mean BMD for these two types of women
Entrance exam scores at Cititon University are normally distributed with a mean of 552 and a standard deviation of 29. If scholarships are awarded to the top 10% of scores, what is the minimum score needed to guarantee a scholarship?
Assume that the heights of women are normally distributed with a mean of 62.4 inches and a standard deviation of 1.6 inches. Find Q3 the third quartile that separates the bottom 75% from the top 25%

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