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Consider a survey concerning the ages of 800 students in a college. The results can be summarized as follows: 320 students were between 18 and 20 years old, 240 students were between 20 and 22 years old, 80 were between 22 and 24 years old, and 160 students were between 24 and 26 years old.
a. Give the frequency distribution of the ages
b. Plot the histogram of the ages
c. Plot the frequency polygon of the ages.
The euro. Shortly after the introduction of the euro coin in Belgium, newspapers around the world published articles claiming the coin is biased.
Prepare an ANOVA table and test the null hypothesis of no linear relationship between the two variables.
The sports expert reported that 202 of 454 athletes in the random sample were women. Is this strong evidence that the participation rate may have increased?
The probabilities of failures for the components 1 and 2 during one period of operation are .15 and .07 respectively, and the component failures are independent. What is the probability that the system functions properly during one period of oper..
test at the 0.01 level, was the mean time for the Delta visits significantly less than that for the British Airway visits? Identify and interpret the p-value for the test.
A normal random variable with a mean of $65.16 and a standard deviation of $10.00. What proportion of the households spent between $40.00 and $50.00.
for the binomial distribution with the given values for n and p state whether or not it is suitable to use the normal
when 12 bolts are tested for hardness their indexes have a standard deviation of 41.7. test the claim that the
Conduct an ANOVA comparing anxiety levels (at post test only) of participants across all three treatments, conduct post hoc test if needed.
Consider the following card game with a well shuffled deck of cards. If you draw a red card, you win nothing. If you get a spade, you win $5.
Two balanced dice are rolled and the number of dots facing up is added. Find the probability that the sum is 10 or 12.
The following partially complete two-way table shows the marginal distributions of gender and handedness for a sample of 100 high school students.
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