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1) Suppose the lengths of the pregnancies of a certain animal are approximately normally distributes with the mean µ = 296 days and standard deviation σ = 26 days.
a) What is the probability that a random selected pregnancy lasts less than 288 days?
The probability that a randomly selected pregnancy lasts less than 288 days is approximately ___________? (round to four decimals as needed)
b) What is the probability that a random sample of 29 pregnancies has a mean gestation period of 288 days or less?
The probability that the mean of a random sample of 29 pregnancies is less that 288 days is approximately _______? (round to four decimals as needed)
c) What is the probability that a random sample of 57 pregnancies has a mean gestation period of 288 days or less?
The probability that the mean of a random sample of 57 pregnancies is less that 288 days is approximately ________? (round to four decimals as needed).
The main part of the ACS contacts 250,000 addresses by mail each month, with follow-up by phone and in person if there is no response. Each household answers questions about their housing, economic, and social status. What is the Population.
A candy company claims that 92% of consumers like their candies. To test this claim, 9571 people are selected at random from those who have eaten the company's candies.
Calculate the z - scores for the three samples, compare the z score to the t-statistic, is the null hypothesis accepted or rejected?
1) There are 500 employees in a firm, 45% are female. A sample of 60 employees is selected randomly. a) Determine the standard error of the proportion.
a study was done on the propagation of an ultrasonic stress wave through a substance. in particular attenuation in
q1. following are the scores on a teacher certification test administered prior to hiring x and the principals ratings
Find out the confidence interval for the population mean also interpret the result. A researcher is interested in whether social assertiveness might be influenced by training procedures.
The entire batch will be rejected if at least one of those tested is defective. What is the probability that the entire batch wili be rejected?
Of the next 15 people that invest in this project, what is the probability that 5 or less people will result an annual net cash flow of at least $100,000.
What is your opinion: Does this study provide evidence that the postmortem serotonin levels are different between patients who die of heart disease and patients who die of other causes?
question 1according to one study it has been claimed that 70 of all single men in montreal would welcome a woman taking
in some states the law requires drivers to turn on their headlights when driving in the rain. a highway patrol officer
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