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Problem: The manufacturer of a medicine claimed that it was 90% effective in relieving an allergy for a period of 8 hours. In a sample of 200 people who had the allergy, the medicine provided relief for 160 people. At 0.01 level of significance:
Required:
Question 1: Find the test statistic of the test.
Question 2: Find the critical value of the test below which the null hypothesis will be rejected.
Question 3: Do you accept the manufacturer's claim?
If Chebychev Inequality gives the lower bound for probability. For the present problem the lower bound for the probability is 0.75 and actual probability is 0.87.
The percentage of protein in a certain brand of dog food is a normally distributed random variable with mean 11.2% and standard deviation 0.6%. The manufacturer would like to state on the package that the product has a protein content of at least ..
Which distribution should be used to create 80% confidence interval?
Although the two samples have an identica winning percentage,one is significant and the other is not. Explain why the two samples lead to different conclusions.
Plot a CDF based on these data. What kind of theoretical distribution do you think would be appropriate for these data? Why?
Suppose that the national average for the math portion of the College Board's SAT is 535. The College Board periodically rescales the test scores such that the standard deviation is approximately 100. Answer the following questions using a bell-sh..
STA101 – Statistics for Business - Construct a 95 percent confidence interval for the true mean number of steps Dave takes on his run
Can the college conclude that the students in the new program are significantly different from the rest of the freshman class? Use a two-tailed test with α=.05.
a study is conducted comparing hdl cholesterol levels between men who exercise regularly and those who do not. the data
Suppose a? five-year, $1,000 bond with annual coupons has a price of $897.88 and a yield to maturity of 5.9%. What is the? bond's coupon? rate?
From these counts, we find that the chi-square statistic is 9.09. Does the study show that there is a statistically significant relationship between smoking.
Draw the histogram for these data using an initial class boundary of 13.5, an ending class boundary of 48.5, and 5 classes of equal width.
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