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Q1) Student believes that no more than 20% of students who finish statistics course get A. A random sample of 100 students was taken. 24 percent of students in the sample received A's.
a) Mention the null and alternate hypothesis.
b) Using a critical value, test hypothesis at the 1% level of significance.
c) What conclusion can you draw concerning the proportion of students receiving A's in course?
Q2) Average gasoline price of one of the major oil companies has been $1.00 per gallon. Since shortages in production of crude oil, it is believed that there has been a significant increase in the average price. In order to test this belief, we randomly selected a sample of 36 of the company's gas stations and determined that average price for stations in sample was $1.10. Suppose that standard deviation of population (s) is $0.12.
b) Test claim that prices have increased at the 5% significance level?
c) What conclusion can you draw about price of gasoline based on this test?
From Group of 40 People, a jury of 12 people is selected. In how many various ways can a jury of 12 people be selected?
Which component of a time series is most likely to occur? Which component has a pattern that must be complete in a single year and repeat from year to year?
At.01 significance level is it sensible to conclude that modification decreased the number of traffic accidents?
Find out a plausible value r for correlation between vehicle weight and miles per gallon (mpg) shown in the scattergram below?
Use a 95% confidence interval for multiple comparisons. Show your calculation by hand between Monday and Tuesday. Match your answer with Minitab output. Attach Minitab output.
Determine the probability that no female are hired. Determine the mean and standard deviation of X.
For each of the 50 states and Washington, D.C., a number of statistics related to education are available for 1992
Where should the warranty limits be set so that only 10% of the TVs need repairs at the manufacturer's expense?
For any distribution the score that separates the highest 10% from the rest of scores is called.
Conclude the finite population, correction factor.With the population size of 1,000 and a planned sample size of 200, what is the finite population, correction.
Do you benefit by using a cum sum chart rather than a control chart?
If an apartment is selected at random, what is the probability that it is not a 2 bedroom apartment on the 2nd floor?
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