A medical test for malaria is given with a false negative rate of 0.5% and it is known that only 1.2% of people tested have malaria. What does the false positive rate have to be for the precision to be 80%?

Q: The western blot assay is a blood test for the presence of hiv. It has been found that this test…

A: From the provided information, Sample size (n) = 400 Level of significance (α) = 0.05

Q: A recent study indicated that 20% of 133 women over age 55 in the study were widows.  a. How large a…

A:

Q: A sample of n=5 scores has a mean of x=9. what is Ex for this sample?

A: Mean = 9 n = 5

Q: If the standardized mortality ratio from a textile worker industry were 4.0 or 400% and the…

A:

Q: Suppose that the researchers wanted to estimate the proportion of patients under 50 years old who…

A: Givenpatients under 50 yearsx=15n=81p^=1581=0.185Margin of error(E)=0.03confidence level(c)=95%

Q: You have seen that the larger the sample size, the smaller the sampling error tends to be in…

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Q: A researcher reports an F-ratio with df = 29, 4 from an independent-measures research study. Based…

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Q: Hello. I appreciate any help. Thanks.

A: Standard Error of estimate:S=√MSEMean square error:The formula for the mean square error is,MSE =…

Q: If you obtained a test score of 78 on a test with an average test score of your class is 70, and SD…

A: Given, -x = 70 SD = 4 n = 36

Q: . How close did your actual results come to your expected results? What caused the difference?

A:

Q: You have seen that the larger the sample size, the smaller the sampling error tends to be in…

A: Sampling error:When a sample is used to estimate a population characteristic the error resulting is…

Q: How do I solve for the mean, quartile 1 and 3?

A: To calculate the mean, median, mode, quartile 1 and quartile 2 of the given data, we should first…

Q: The data for the height of women is approximately bell-shaped. If a woman’s height has a z-score of…

A: Given that  Z-score is -1.3

Q: Diastolic blood pressure in adults is normally distributed with m = 80 mm Hg and s = 12 mm Hg. In a…

A: The probability that diastolic blood pressure below 70 mm Hg is,

Q: A researcher calculates the variance of her sample to be s = -6. , what would you tell the…

A: Here's the explanation for this as follows; The sample variance, s², is used to calculate how varied…

Q: . A population with a mean of 10 has EX 250.How many scores are in the population?

A: Note: Hey there! Thank you for posting the question. For calculating number of scores in the…

Q: The research examining the effects of preschool childcare has found that children who spent time in…

A: a) Null hypothesis: H0: µ1 = 81. Alternative hypothesis: H1:µ1> 81. .Here, the sample mean, M is…

Q: The effectiveness of a blood-pressure drug is being investigated. How might an experimenter…

A: It is given that the effectiveness of blood-pressure drug is being investigated.

Q: A researcher at a major clinic wishes to estimate the proportion of the adult population of the…

A:

Q: Given the mean of the difference scores is 7.0, standard deviation of the difference scores is 3.5,…

A: Given that, The mean of the difference scores is 7.0 The standard deviation of the difference scores…

Q: A researcher reports an F-ratio with df = 1, 24 for an independent-measures experiment. If all the…

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Q: For a population with µ = 84 and σ = 4, what is the z-score corresponding to X = 80?

A: From the given information,   Mean = 84 Standard deviation = 4   The objective is to find the…

Q: The margin of error is always greater than or equal to the standard error.

A: Given that, The margin of error is always greater than or equal to the standard error.

Q: The Department of Health wishes to determine the percentage, p, of the general population who are…

A: Given : The test for Cooties is known to be 99% accurate given that a patient is infected and 90%…

Q: In 2018, the General Social Survey asked a random sample of 1,414 adults "Have you ever been told…

A: a. A random sample of 1,414 adults are taken for a survey to ask question 'Have you ever been told…

Q: A reaction takes place that is expected to yield 171.9 g of product, but only yields 154.8 g. What…

A: Given that: Theoretical yield =171.9 g Practical yield =154.8 g Formula  The percentage error in…

Q: A random sample of 525 people was taken from a very large population. 225 of the people in the…

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Q: The workers at drug factory took a random sample of 800 drug tablets and found that 40 of them were…

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Q: A researcher at a major clinic wishes to estimate the proportion of the adult population of the…

A: We have to find correct answer for given question..

Q: It has been claimed that over 30 percent of entering college students have blood cholesterol levels…

A: The appropriate test for the given claim is one sample t test over the hypothesis, H0 : μ≥200 Ha ;…

Q: In elderly Americans, a new blood test is being developed to diagnose a particular disease. Suppose…

A: According to the provided information, Sensitivity is 80% and specificity is 70%. True Positive (A)…

Q: An individual is selected from a normal population with a of μ = 80 with σ= 20, and a treatment is…

A: It is given that the mean is 80 and the standard deviation is 20.

Q: d) Theth percentile corresponds to this score, which means that 299 is (Round to five decimal places…

A: Now finding the answer for (d) Given that the best score is 299 now we have to find percentile…

Q: If the mean of x bar is equal to 15.3 and the standard deviation of x bar is 1.20, what is the…

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Q: Explain why the F-ratio is expected to be near 1.00 when the null hypothesis is true.

A: Given Null Hypothesis is true which indicates the treatment has no systematic effect The error term…

Q: Average IQ scores for young school children are known to be 100 (SD = 15).  However, the literature…

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Q: Given the accuracy of a patient's blood test to diagnose gestational diabetes and the prevalence…

A: Hey there! Thank you for posting the question.  Since you have posted a question with multiple…

Q: When doing blood testing for a viral infection, the procedure can be made more efficient and less…

A: Given that  Number of samples (n)=3 Probability of individual blood sample testing positive for the…

Q: When trying to determine how many samples are needed to perform an experiment, the desired accuracy…

A: It is given that margin of error (E) is 0.05 and the confidence level is 0.95.

Q: In most cases of study, the statistical analysis is not giving the precise value of measurement but…

A: It is because in most cases we don't have data on the entire population but only a small part of it…

Q: What percent of our campus is female? If no preliminary study is made to estimate, how large a…

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Q: How many weeks of data must be randomly sampled to estimate the mean weekly sales of a new line of…

A: Given : Margin of error, ME = 400 population standard deviation, σ = 1400

Q: What distinguishes interpolation from other form of approximation?

A: Interpolation is the process of estimating the value of function for any intermediate value on an…

Q: The research examining the effects of preschool childcare has found that children who spent time in…

A:

Q: A researcher reports an F-ratio with df = 3, 36 from an independent-measures research study. Based…

A: Given: F ratio with df=3,36

Q: The distribution of the weights of a sample of 1,400 cargo containers is symmetric and bell-shaped.…

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Q: Assume that we have made 10 repeated measurements of a quantity, and as a result the error assigned…

A: We have given that a statement. Assume that we have made 10 repeated measurements of a quantity, and…

Q: - What percentage of guesses fell between z-scores of -1.0 to +2.0?

A: