of all students at the university of metropolis the proportions taking certain numbers of units are shown in the table below. find the expected number of units that a student at u.m take

a researcher wants to determine the average amount of minutes it takes for the medicine to reduce the pain for adult males. The researcher contacted 107 subjects to participate in the study, n=but only got results from 79 of the subjects. The average time it took for the medicine to reduce headache pain of these subjects was 27 minutes. What is the population? What is the sample? What tis the parameter? What is the symbol for this parameter? What is the statistics? What is the symbol for this statistics?

1. A population consists of 4 types of units, A, B, C, and D. A theory suggests that these should occur in the ratios 3:3:3:1, respectively. A random sample breaks down as follows: Туре number observed A C D 19 3 9 9. Carry out a chi-squared goodness of fit test to see if this data fits the theory, and give (a) the test statistic and (b) the P-value of the tesSt. If some cell has too low an expected frequency, combine that cell with cell C. Does the data contradict the theory? (c) Answer this question "yes" or "no" based on the results of the goodness of fit test at the a = .05 significance level.

A researcher develops a test for identifying intellectually gifted children. It has a μ=56 and σ=8.  a. what percentage of children are expected to score above 60?  b. What percentage of the scores will be below 54?    *ANSWER BOTH PARTS A & B*

In a random sample of 765 adults in the United States, 122 of them said if they had to cover a $400 emergency expense, they would need to use a credit card and pay it back over time.  a. what is the parameter being estimated b. what is the sample proportion (must show work)

Suppose the lengths of human pregnancies are normally distributed with µ = 266 days and o= 16 days. Complete parts (a) and (b) below. (Type integers or decimals.) A. The proportion of human pregnancies that last less than B. The proportion of human pregnancies that last more than days is days is Provide a second interpretation of the area using the given values. Select the correct choice below and fill in the answer boxes to complete your choice. (Type integers or decimals.) O A. The probability that a randomly selected human pregnancy lasts less than B. The probability that a randomly selected human pregnancy lasts more than (b) The figure to the right represents the normal curve with µ = 266 days and o = 16 days. The area between x = 280 and x = 295 is 0.1558. Provide two interpretations of this area. days is days is Provide one interpretation of the area using the given values. Select the correct choice below and fill in the answer boxes to complete your choice. (Type integers or…