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Compute the standard error of the point estimate. Compute 95% confidence interval for the proportion of all Type II diabetics who take insulin to manage their diabetes.
Mutual funds often compare their performance with a benchmark provided by an "index" which explains the performance of the class of the assets in which the fund invests. Please explain clearly why t
Recent attention has focused upon the health care system, particularly on managed care plans. A study was undertaken within one managed care plan to assess whether patients' reports of satisfaction
A researcher at the major hospital wishes to estimate the proportion of the adult population of the United States that has high blood pressure. How large a sample is needed in order to be 98% confid
The mean monthly income of the trainees of engineering firm is $600, with the standard deviation of $100. Determine the probability that an individual trainee earns less than $500 per month.
A student can answer any 15 questions from the total of 20 questions on exam. In how many different manners can the student pick the questions?
In the given test, the population's mean score is 200 with population's standard deviation of 20. Determine the probability that a sample chosen from this population at random will have a mean score
A questionnaire consists of 5 questions, with 2 different answers for each question. In how many ways can you select one answer for each question?
The estimated standard error in denominator of the repeated-measures t statistic measures the average mean difference that is expected for a sample when there is a zero mean difference for the popu
44% of adults say cashews are their favorite kind of nut. You randomly choose 12 adults and ask each to name his or her favorite nut. Determine the probability that the number who say cashews are th
An independent-measures study employ two samples, each with n = 7, to compare two treatment situations. The t statistic for this study will have degrees of freedom equal to?
A repeated-measures research study comparing two treatments with the set of 10 scores in each and every treatment will produce a t statistic with df = 19.
Find the mean, variance, and standard deviation of the binomial distribution with the given values of n and p. n=122, p=0.89 (Round to the nearest tenth as needed.)
If two samples are same size (n1 = n1), then the pooled variance is the average of the two sample variances.
Assume that in fact blood cholesterol level of all men aged 20-34 follows normal distrubution with the mean 188 and standard deviation of 41. Determine the sampling distrubution of x bar, and what i
A researcher desires to be 95% confident that her estimate of the true proportion of individuals who travel oversees is within 4% of the true proportion.
A survey found that 83% of men questioned preferred computer-assisted instruction to lecture as well as 75% of women preferred computer-assisted instruction to lecture.
Determine the likelihood of accepting a lot that is 1 percent defective? (Round answer to 4 decimal places.) If the quality of the incoming lot was actually 2 percent defective, what is the likelihoo
The company president always invites one of four vice presidents to attend games with him, and claims he chooses the person to attend at random. One of the four vice presidents hasn't been invited
A study was conducted to determine whether women who do not have health insurance coverage are less likely to be screened for breast cancer, and whether their disease is more advanced at the time of
In a given experiment, an increase in variance requires to be detected if it is three times the variance indicated by previous experiments. Find n for this experiment if alpha = 0.01 and beta= 0.05.
Employ a stimulation to determine the likelihood of seeing at least 4 of 10 randomly chosen drivers talking upon their cell phones if the actual rate of usage is 12%. Describe your conclusion clearl
A person with kind O-positive blood can receive blood only from other type O donors. About 44% of the U.S. population has type O blood. At a blood drive, how many potential donors do you expect to
A researcher at the major hospital wishes to determine the proportion of the adult population of the United States that has high blood pressure. How large a sample is needed in order to be 98% confi
A random sample of 10 parking meters in the beach community showed following incomes for day. Suppose the incomes are basically distributed. $3.60 $4.50 $2.80 $6.30 $2.60 $5.20 $6.75 $4.25 $8.00 $3