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A box of strawberries are normally distributed with an average weight of 1 pound, and a standard deviation of 1 ounce. Answer the following questions by using the empirical rule. ( there are 16 ounces in 1 pound)
a. What is the probability of getting a box of strawberries greater than 1lb 1oz?
b. what is the probability of getting a box of strawberries less than 14oz?
c. Given that a particular box of strawberries weighs less than 1lb 2oz, what is the probability that it is greater than 15oz?
d. Laura needs to buy 10 boxes of strawberries for her party. What is the expected value and variance of the total weight of Laura's strawberries?
e. What is the probability that at least two of laura's strawberry boxes are greater than 14oz?
Find the z-score for each value of x = 54. (Give your answer correct to two decimal places.)
At a =.02 , is the number of sticks of gum a person chews per day actually greater than 8? Use the traditional method of hypothesis testing.
how large of a sample size do we need to estimate the mean annual income of native americans in onondaga county new
the proportion of students in private schools is around 11. a random sample of 450 students from a wide geographic area
Chi-square tests are great to show if distributions differ or if two variables interact in producing outcomes. What are some examples of variables that you might want to check using the chi-square tests? What would these results tell you?
A sample of 84 golfers showed that their average score on a particular golf course was 89.05 with a standard deviation of 3.47.
One item on a questionnaire asks, "How many siblings (brothers and sisters) did you have when you were a child?" A researcher computes the mean, the median, and the mode for a set.
an airline company sells 160 tickets for a plane with 150 seats knowing that the probability that a passenger will not
Conduct a hypothesis test to test that the population mean for population A is no greater than the population mean for B. Use the 0.08 significance level.
In 1990, the population of Austin, Texas, was 494,290. During the next 10 years, the population increased by about 3% each year.
Normal approximation to the Binomial distribution - Evaluate the probability that at least 195 of the students are female.
q1. in a recent study of 154 households 54 had air conditioning. find the 95 confidence interval of the true
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