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Question - Test results for a disease are taken from a sample of 600 males and 800 females in a city. The data is given below:
Gender
Test result
Positive
Negative
Male
260
340
Female
346
454
Is there any significant difference between the proportions of males and females regarding results? Test at 5% level of significance.
To gather information about the validity of a new standardized test for tenth-grade students in a particular state, a random sample of 15 high schools.
Do motivation levels between upper-level (group 1) and mid-level (group 2) managers differ? Use the information below to answer the following questions.
Find the proportion of people in the survey who believe astrology is very scientific.
the accompanying data show the number of people working and the sales for a small bookstore. the regression line is
Explain the bias and sampling error in this study.
a set of n 20 pairs of scores x and y values has ssx 25 ssy 16 and sp 12.5. if the mean for the x values is m 6 and
Use the current weekly demand shown in Table 3, find the cost minimizing routing of generators from the four plants to the nine warehouses. Your answer must include a model formulation and a shipping schedule, which includes a list of recommended ..
At the .05 significance level, is there a difference in gas mileage for the different types of gas? Write out your null and alternative hypotheses for the problem and state what the finding means practically.
New population of pilots has normally distributed weights with mean of 128 lb and standard deviation of 31.7 lbs. If the pilot is randomly selected, determine the probability that his weight is between 120 lb and 181 lb.
give an example of global sustainability that demonstrates your understanding of the
A certain statistics instructor participates in triathlons. The accompanying table lists times (in minutes and seconds) he recorded while riding a bicycle for f
If you randomly choose 1, what is the probability that it will be defective? Use two decimal places for the answer.
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