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The corner convenient shop sells two flavored cookies: strawberry and vanilla. Data show that 23% customers buy strawberry flavored cookies and the rest buys vanilla flavored cookies. You may have more than one choice. Correct answers will result in earning points, while incorrect answers will result in losing points.
a. The probability that two of the next three customers will not buy strawberry flavored cookies is not 0.409
b. The probability that two of the next three customers will buy strawberry flavored cookies is not 0.409
c. The probability that the next three customers will buy strawberry flavored cookies is not 0.012167
d. The probability that the next three customers will not buy strawberry flavored cookies is not 0.021952.
Describe whether the data appear to be approximately normally distrusted by .. a. Comparing data characteristics to theoretical properties.
A biologist estimates that 50% of deer in the region carry a certain type of tick. for a sample of 300 deer selected at random, what is the chance that 155 or fewer deer have this tick?
You are the manager of a softball league in the locality in which there are 5 local teams with 10 people each. The league has been arranged for parity so that each local team has 5 good players and 5 bad players.
If this past distribution is a good indicator of future grades, what is the probability of a student receiving a C in the course?
an airline has an advertisement that states ...our passengers always receive their bags within 20 minutes after the
He randomly selects a sample of 10 items of the procduct from a large lot ready to be shipped. He (given that) the true proportion of perfect condition items is only 80% what is the probability that the lot will not be shipped?
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Make a scatterplot to determine what kind of relationship there seems to be between the two variables. Use the percent of lead removed as the response variable.
At one university, students are given z-scores at the end of the semester rather than the traditional GPAs. The mean and standard deviation of all students’ cumulative GPAs, on which the z-scores are based, are 2.7 and 0.5 respectively.
A population of data from a paper supply company is known to have a mean weight of 55 ounces per ream and a population standard deviation of 5 ounces. The population is known to be bell shaped and symmetrical. Which of the following statements is ..
the three forms of the research or alternative hypothesis area. high low and neutralb. increased decreased or changedc.
Determining sample-size is important step when planning a statistical study. It is also quite a difficult task since many variables must be considered.
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