QUESTION 8 The antibody production of 12 male red-winged blackbirds before and after receiving testosterone implants was compared. The units for antibody levels were natural log (10-3 optical density) per minute (In(mOD/min)). The mean change in antibody production was d = 0.056, and the standard deviation was s, = 0.295 If you were assigned the task of repeating this experiment, and wanted to ensure that you could detect a mean change of 0.06 units with a probability of 0.8, then what sample size would you use? Since we are calculating n for a study of individuals, answers should be rounded up to the next whole number.

Rachael got a 660 on the analytical portion of the Graduate Record Exam (GRE). If GRE scores are normally distributed and have mean μ = 600 and standard deviation σ = 30, what is her standardized score?

QUESTION 8 Nabisco claims that Chip Ahoy Cookies have an x ̅=28.67 chocolate chips per cookie with a SD=2.67.  You randomly select 15 cookies from a new bag and carefully remove all the chocolate chips from each of the 36 cookies.  You find the mean of the chocolate chips for the 15 cookies is 24.27 chocolate chips per cookie.  Calculate the standard error for the chocolate chips in your experiment.  (round to the nearest hundredth).

Question 24 please

Newspaper Reading Times A survey taken several years ago found that the average time a person spent reading the local daily newspaper was 10.8 minutes. The standard deviation of the population was 3  minutes. To see whether the average time had changed since the newspaper's format was revised, the newspaper editor surveyed 40  individuals. The average time that the 40  people spent reading the paper was 12.4  minutes. At α=0.10 , is there a change in the average time an individual spends reading the newspaper? Find the 90%  confidence interval of the mean. (a) State the hypothesis and identify the claim with the correct hypothesis. :H0     ▼(Choose one)   :H1     ▼(Choose one)   This hypothesis test is a ▼(Choose one) test.       (b)Find the critical value(s). Round the answer to 2  decimal places, if necessary.   Critical values:   (c)Compute the test value. Round the answer to at least 2 decimal places, if necessary. z=   (d)Make the decision.…

Question 9 Adult men have heights with a mean of 69.0 inches and a standard deviation of 2.8 inches. Find the z-score of a man 64.7 inches tall. (to 2 decimal places)

Newspaper Reading Times A survey taken several years ago found that the average time a person spent reading the local daily newspaper was 10.8 minutes. The standard deviation of the population was 3  minutes. To see whether the average time had changed since the newspaper's format was revised, the newspaper editor surveyed 40  individuals. The average time that the 40  people spent reading the paper was 12.4  minutes. At α=0.10 , is there a change in the average time an individual spends reading the newspaper? Find the 90%  confidence interval of the mean. **NOTE** I already have answer for a,b, and c    (d)Make the decision.   ▼(Choose one) the null hypothesis.       (e)Summarize the results.   There ▼(Choose one) enough evidence to support the claim that there is a change in the average time an individual spends reading the newspaper. Find the 90% confidence interval of the mean. Round the answers to nearest whole number. <u<   (f)Do the results agree?…