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The body mass index (BMI) of an individual is one measure that is used to judge whether an individual is overweight or not. A BMI between 20 and 25 indicates that one is at a normal weight. In a survey of 750 men and 750 women, the Gallup organization found that 203 men and 270 women were normal weight. Is there significant evidence to conclude that there is a difference in the proportion of men and women who are normal weight.
1. State the null hypothesis and alternative hypothesis
2. What is the test statistic?
3. What is the critical value?
4. What is the decision regarding the null hypothesis?
do students at various universities differ in how sociable they are? twenty-five students were randomly selected from
universities play a significant role in the provision of higher education within australia. as part of the goal to
The weights of adult males is normally distributed with a mean of 200 pounds and a standard deviation of 40 pounds. Calculate the probability that an adult male weighs less than 130 pounds.
Similar survey of student population 10 years ago found that coffee shop was favoured by 20% of students, and pizza and hamburger were each preferred by 40% of the students. Determine the expected frequencies for chi-square test.
1. graph the null hypothesis on a number line.2. determine whether the hypothesis test with the given null and
Assuming that the manager's claim is correct, calculate the probability that 117 or fewer of 205 randomly selected marketing researchers would disapprove of the scenario.
Which of following statements would be right concerning a twotail test at 0.05 level of significance? We can conclude that average cottage cheese consumption in America is at least 0.705 pound more or less than 2.75 pounds per person per year.
question a process for the manufacture of penicillin was studied. there were five variants of the basic process being
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to investigate the fluid mechanics of swimming twenty swimmers each swam a specified distance in a water-filled pool
The time between the arrival of electronic messages at your computer is exponentially distributed with a mean of four hours. What is the probability that you do not receive a message during a two-hour period?
in a study conducted by a local university it was found that 25 of college freshmen support increased military
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