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Question - Fuel Consumption and Cars The battery manufacturer Varta sells a car battery with 800 coldcranking amps and advertises great performance even in bitingly cold weather. Varta claims that after sitting on a frozen Minnesota lake for 10 days at temperatures below 32°F, this battery will still have enough power to start a car. Suppose the actual probability of starting a car following this experiment is 0.75, and 15 randomly selected cars (equipped with this battery) are subjected to these grueling conditions.
a. Find the probability that fewer than 10 cars will start. Write a Solution Trail for this problem.
b. Find the probability that more than 12 cars will start.
c. Suppose 9 cars actually start. Is there any evidence to suggest that the probability of starting a car is different from 0.75? Justify your answer.
In the 2000 football season, 247 plays were reviewed by officials using instant video replays, and 83 of them resulted in reversal of the original call.
Use the Chi-Square Goodness-of-Fit test to see if there is a difference between the number of side effects from the different brands of medication. Use a significance level of .01.
A recent study at a local college claimed that the proportion of students who commute more than fifteen miles to school is no more than 25%.
errors in a billing process often lead to customer dissatisfaction and ultimately hurt bottom-line profits. an article
You are given the sample mean and the sample standard deviation. use this information to construct the 90% and 95% confidence intervals for the population mean. Which interval is wider?
Identify the null hypothesis, alternative hypothesis, test statistic, P-value or critical value(s), conclusion about the null hypothesis, and final conclusion that addresses the original claim.
a) What statistical test should be used to analyze these data? b) Identify H0 and Ha for this study. c) Conduct the appropriate analysis d) Should H0 be rejected? What should the researcher conclude?
A bowl contains 16 chips, of which 6 are red, 7 are white, and 3 are blue. If four chips are taken at random and without replacement, find the probability that: there is at least one chip of each color.
question a nutritionist thinks the average person with an income below the poverty level gets less than the recommended
a sample of 66 women over the age of 50 used the new cream for 6 months. of those 66 women 30 of them reported skin
Draw a picture of the appropriate distribution for the standardized statistic, and find the area below the value of the standardized statistic computed in part (a).
discuss the basic differences and similarities between the binomial distribution and the poisson distribution. use
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