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Question: Manufacturing and Product Development Eyedrops are used by many people to soothe and relieve irritation and to lubricate their eyes. A manufacturer claims that the amount of dextran, which helps to prolong the effect of eyedrops, contained in its eyedrops product is 70%. Thirty-six randomly selected bottles of these eye drops were obtained and the sample mean amount of dextran was 68.25%. Assume the population standard deviation is σ = 5%.
a. Find the sampling distribution of the sample mean.
b. Find the probability that the amount of dextran is more than 71%.
c. Does the sample mean found suggest that the manufacturer's claim is wrong? Justify your answer.
Each student will calculate the average area of the sample(s) of rectangles. The instructor will collect these averages and pass out a list of them to the class. Repeat the data collection procedure, using samples of size 10.
Is there any evidence to suggest that the mean amount of aspartame in an 8-ounce can of diet soda is greater than 65 mg? Use a = 0.01.
Assume we want to use a 0.10 significance level to test the claim. (a) Identify the null hypothesis and the alternative hypothesis. (b) Determine the test statistic. Show all work; writing the correct test statistic, without supporting work, will r..
A random sample of 15 paired observations has a correlation of -.46. Can we conclude that the correlation in the population is less than zero? Use the .05 significance level.
A car is advertised as having a gas mileage rating of at least 30 miles/gallon in highway driving. If the miles per gallon obtained in 10 independent experiments are 26, 24, 20, 25, 27, 25, 28, 30, 26, 33, should you believe the advertisement? Wha..
These questions belong to Basic Statistics and discuss about two multiple choice questions. The first question is about the appropriate use when testing hypothesis for studying groups. The second question is about computation of location of signif..
Perform an appropriate hypothesis test, showing the necessary calculations and/or explaining the process used to obtain the results any group over 30 needs z test.
Construct a 95% confidence interval estimate for the population proportion of airline travelers who think that the airline fee that is most unreasonable is additional charges to redeem point/miles.
The following graph shows a fairly high correlation between the ratio of capital spending to GDP and the inverted ratio of net exports to GDP over the post-WWII
you draw two cards from a standard deck of 52 cards without replacing the first one before drawing the second. find the
Do winning teams generally enjoy greater attendance at their home games? Describe the association.- Is attendance more strongly associated with winning or scoring runs? Explain.
Compute the range and interquartile range
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