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Consider the following. (Give your answers correct to two decimal places.) Find the standard score (z) such that the area above the mean and below z under the normal curve is 0.3814.
The weights of ripe watermelons grown at Mr. Smith's farm are normally distributed with a standard deviation of 2.1 lb. Find the mean weight of Mr. Smith's ripe watermelons if only 9% weigh less th
Suppose we have a weightd coin, which comes up heads with probability p. We toss the coin until we obtain a total of n heads (for some integer n>0). What is the expected number of tosses until th
Would you suspect that the IDEA surveys sent to South students each term could be biased in the responses receieved? Why or why not? Using the data set below please calcutate the : 1, 16, 12, 1, 2,
Suppose IQ score were obtained from a randomly selected siblings.For such 20 pairs of people the linear corelation is 0.907 and the equation of regression line is y= 3.92+0.95x ,where x represents t
The heat evolved in calories per gram of a cement mixture is approximately normally distributed. The population mean is thought to be 100 and the population standard deviation is 2. Data on n=9 spec
The 70-year long-term record for weather shows that for New York State, the annual precipitation has a mean of 39.99 inches and a standard deviation of 4.39 inches. The annual precipitation amount h
Black bears (Ursus americanus) have a tendency to wander for food, and they have a high level of curiosity. These characteristics will sometimes get them into trouble when they travel through human-
What proportion of Americans drink more than the recommended 8 servings? What proportion of Americans drink less than half the recommended 8 servings?
A common test for extrasensory perception (ESP) asks subjects to identify which of four shapes (star, circle, wave, or square) appears on a card unseen by the subject.
According to the M&M company, each package of Plain M&Ms should contain 24% blue, 14% brown, 16% green, 20% orange, 13% red, and 14% yellow M&M's. Explain in detail the difference betwee
The weights of all candy bars of this type are certainly not constant because of slight variations in the factory production process. Assume these weights vary according to a normal distribution wit
Remains constant if the value of sigma is known What is the sampling distribution of a statistic? Explain in your own words.
To give a 99.9% confidence interval for a population mean ?, you would use the critical value
The diameter of a brand of Ping-Pong balls is approximately normally distributed, with a mean of 1.32 inches and a standard deviation of 0.04 inch. A random sample of 4 Ping-Pong balls is selected.
In a survey, 3 of 4 students said the court show "too much concern" for the criminals. Find the probability that AT MOST 3 out of 7 randomly selected students will agree with this statement.
Assuming the amount of fill is normally distributed, what is the probability that the next randomly checked bottle contains more than 32.26 oz? (Give your answer correct to four decimal places.)
Assume that a simple random sample has been selected froma normally distributed population and the test given claim.Identify the nulla nd alternative hypotheses,test statistics,pvalue,critical value
Assume the above data represents the entire population of people calling the dollar day mail order company. Use the relative frequencies to find P(x) for x= 1 to 13 What is the probability that a cust
What is the best predicted IQ of the older child,given that the younger child has an IQ of 104?Use a significance level of 0.05.
What is the best predicted IQ of the older child,given that the younger child has an IQ of 99?Use a significance level of 0.05.
Find a linear correlation coefficient r, and find the p-value using a=0.05. Is there sufficient evidence to conclude that there is a linear correlation between systolic measurments and diastolic mea
A book was published entitled: One Million Random Digits. In it there are listed one million (1,000,000) digits, each of course being from 0 to 9, inclusive. Suppose that there were 100,907 fives am
In a study of pregnant women and their ability to correctly predict the sex of their baby, 56 of the pregnant women had 12 years of education or less, and 39.3% of them correctly predicted the sex o