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A maker of a certain brand of low fat cereal bars claims the average saturated fat content is 0.5 grams. To check the claim, a random sample of 9 cereal bars of this brand was drawn, and the sample mean was found to be 0.52. Assume that the population standard deviation is 0.2.
Assume the distribution of the fat content is aproximately normal, what is the sampling distribution of the sample mean?
there are 1000 students in the senior class at a certain high school. the high school offers two advanced placement
question suppose the following summary statistics are obtained from a large group of individuals x52.0 sx8.7 y147.3
a box contains 20 dvds 4 of which are defective. if two dvds are selected at random without replacement from this box
What has been the most valuable skill you've learned and why
If the weekly average expenditure of all households is $53,000 but an expert argues that the weekly expenditure is more than $53,000, test his claim at a 5% level of significance and interpret your results.
a manufacturer of industrial solvent guarantees its customers that each drum of solvent they ship out contains at least
In the mid-1990s, Colgate-Palmolive had developed a new toothpaste for the U.S. market, Colgate Total, with an antibacterial ingredient that was already being successfully sold overseas.
Compare and contrast internal and external validity. Describe and give examples of research questions for which external validity is a primary concern. Describe and give examples of research questions in which internal validity is a primary concern.
when ben looks at the keyboard he sees fingerprints on the following lettersa e f g l o r v yhow many different
Of a random sample of 600 trucks at a bridge, 114 had bad signal lights. Construct a 95 percent confidence interval for the percentage of trucks that had bad signal lights.
Annual family dental expenses for the families of a random sample of ten employees of a company are given below. You can assume the family dental expenses for the employees of the company are normally distributed.
Probability based on normal distribution. Suppose among X has a normal distribution, and find the indicated probability.
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