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The time for this event for boys in secondary school is known to possess a normal distribution with a mean of 460 seconds and a standard deviation of 60 seconds. Find the probability that a randomly selected boy in secondary school can run the mile in less than 322 seconds.
In our discussions of basic probability theory the concepts of mutually exclusive events and independent events share prominent roles.
Absolutely lost on how to determine what is being asked in below problem. Need to calculate the covariance and correlation between X and Y
State the null and alternate hypotheses. Calculate the sample standard deviation. Determine which test statistic is appropriate (chi-square or F), and calculate its value.
Use a 95% CI to estimate the difference between the proportions of men and women managers who are married. Interpret the interval and what is the conclusion in terms of the populations from which the samples were drawn.
At the .01 significance level, can the manufacturer conclude that the price reduction resulted in an increase in sales?
Determine the critical z values. Suppose that normal distribution applies. Right-tailed test; standard deviation = 0.04.
A sample of 1545 men and an independent sample of 1691 women were used to compare the amount of housework done by men and women in dual-earner marriages.
In a recent study of incomes in Allegheny county in Pennsylvania it was found that distribution of family incomes is skew to the right. what can we say about the relationship between mean and median?
A test was conducted to find out whether gender of a spokesperson affected the likelihood that consumers would prefer a new product. A survey of consumers at trade show employing a female spokesperson determined that 70 out of 150 customers prefe..
If the researcher computes the t-statistic to be 4.2 and t-value found in t table for df=60 and level of significance of 0.5, is 2.0 researcher would accept or reject null hypothesis.
What are some conditions under which business decisions are made using subjective probability concepts? Could you please cite two examples of subjective probability.
A researcher conducts an experiment comparing two treatment conditions and obtains data with 10 scores for each treatment condition.
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