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A random sample of 100 voters in a community produced 59 voters in favor of candidate A. The observed value of the test statistic for testing the null hypothesis Ho: p =0.5 versus the alternative hypothesis HA: p>0.5 is:
a. 1.80 *
b. 1.90
c. 1.83
d. 1.28
e. 1.75
Compute the autocorrelations of the income series for the first 10 time lags. Is the behavior of the autocorrelations consistent with your choice in part b?
Is there any statistically significant difference in how the drugs perform? If so, explain the effect. Use the post hoc tests as needed.
when we pick a point estimator whose sampling distribution is not centered on the population parameter being estimated
the mean amount spent by a family of four on food per month is 700 with a standard deviation of 85. assuming that the
Construct a 99% confident interval for the standard deviation of the amount of vitamin B6 per pill.
as the number of degrees of freedom for a t distribution increases the difference between the t distribution and the
It is generally believed that electrical problems affect about 14% of new cars. An automobile mechanic conducts diagnostic tests on 128 new cars on the lot." What is the standard deviation for the sample proportion?
A big multinational corporation based in Toronto recently moved it's production facilities to Mexico. When the corporation was in Toronto, it had an older, experienced labour force with a mean age of 45 years.
Carry out a hypothesis test to see if our belief can be supported. State the null hypothesis and the alternative hypothesis that we would use for this test.
for the xy data below computea r and determine if it is significantly different from zerob the slope of the regression
A manufacturer claims that the mean lifetime, mu, of its light bulbs is 44 months. The standard deviation of these lifetimes is 7 months. Seventy bulbs are selected at random, and their mean lifetime is found to be 43 months.
A weekly demand at a grocery store for a brand of breakfast cereal
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