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Q1) Survey of students at certain college illustrated that 60% of them read daily newspaper and 40% read weekly news magazine. Also, if student reads daily newspaper, then chance of reading the weekly news magazine rose to 50%.
i) Determine percentage of students read both?
ii) Find out percentage of students read at least one?
iii) Determine percentage of students read neither?
iv) Determine percentage of news paper readers of a news magazine also read news paper?
Q2) Two letters are chosen at random without replacement from word statistical.
a) Determine the probability that both letters are s?
b) Determine the probability that both letters are the same?
c) If you know both letters are same, determine the probability that both are s?
Solve linear program graphically
In a distribution of scores, the arithmetic mean is 51, the median is 55, and the mode is 62. What is the score, in percentile form, of a subject who does less well than two-thirds of the sample?
The following frequency distribution was obtained. The data values are in hours. Construct a histogram for the data .
We are interested in comparing the proportions of males and females who think earning a large salary is very important to them. I surveyed 200 of each gender and recorded their answers to the question as yes or no.
Be certain to mention the direction of the relationship, the strength of the relationship, and whether our findings are statistically significant
Determine the mean number of times the machine was used per day.
Explain your answer to someone who is familiar with the t test for a single sample, but not with the t test for independent means.
Explain in words general pattern of correlation is statistically important.
In a normal frequency distribution, 32% of the cases:
A certain airplane has two independent alternators to provide electrical power.
Construct a 95% confidence interval for the difference in the proportions of women and men who have regular exercise programs.
The average hourly wage of employees of a certain company is $9.83. Assume the variable is normally distributed.
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