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A brake pad manufacturer claims its brake pads will last for 38,000 miles. You work for a consumer protection agency and you are testing this manufacturer's brake pads. Assume that the life span of brake pads are normally distributed. You randomly select 49 brake pads. In your tests, the mean life pad of the brake pads is 37,650 miles. Assume standard deviation of the population of brake pads is 1000 miles.
A. Assuming that the manufacturer's claim is correct, what is the probability the mean of the sample is 37,650 miles or less?B. Using your answer from part (A), what do you think of the manufacturer's claim?C. Would it be unusual to have an individual brake pad last for 37,650 miles? Why or Why not?
Given this Analysis of Variance information for three treatments each with six observations.with SST =1116, SSE=1068, SSTotal =2184. What is the mean square for treatments?
How many voters required to be sampled to evaluate the proportion within 0.05 with 95% confidence?
Why are quasi-experimental designs used more often than experimental designs?
Describe what type of control chart you can use and how do you calculate the control limits to check if the software design process in this organization is in control.
Suppose that 46 percent of families living in a certain country own a car and 18 percent own an SUV. The Addition Rule might suggest, then, that 64 percent of families own either a car or an SUV. What's wrong with that reasoning.
Assuming that the population standard deviations are the same, perform a two independent samples t-test on the hypotheses Null Hypothesis: μ1 = μ2, Alternative Hypothesis: μ1 ≠ μ2. What is the test statistic and p-value of this test?
Suppose you had flipped a fair coin 19 times and "tails" had come up each time. The probability of now tossing a "head" on the 20th flip would then be:
Basic Statistics problem
Gender differences in dream content are well documented (Winget & kramer, 1979). Suppose a researcher studies aggression content in the dreams of men and women.
Determine the following areas under standard Normal distribution curve.
The historical reports from two major networks showed that the mean number of commercials aired during prime time was equal for both networks last year.
Find a 95% confidence interval for the percentage of girls and women in Taiwan who had antibodies at that time.
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