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1. Here are several situations in which there is an incorrect application of the ideas in statistical inference. Write a sentence or two in each case explaining what is wrong and why it is wrong.
(a) A significance test rejected the null hypothesis that the sample mean is equal to 500.
(b) A test preparation company wants to test that the average score of their students on the ACT is better than the national average score of 21.2. They state their null hypothesis as H0: µ > 21.2.
(c) A study summary says that the results are statistically significant and the p-value = 0.98.
(d) The computed value for the test statistic is Z0 = 0.018. Because this is less than 0.05, the null hypothesis is rejected.
one of the first conditional probability paradoxes was provided by bertrand.23 it is called the box paradox. a cabinet
suppose the probability of a bike getting stolen in honolulu is 10 and 22 bikes are randomly selected in honolulu.1
The number of passengers on the Carnival Sensation during one-week cruises in the Caribbean follows the normal distribution.
The proportion of participants registering strong disapproval was 65%. At the 95% confidence interval and using a two-sided test, which of the following statements do these data support?
in 2008 a university in the midwestern united states surveyed its full-time first-year students after they completed
Use a bar chart to display the increase in the number of family practice physicians from 1990 to 2002. Calculate the percent of office-based physicians who are family practice physicians and then display this data in a bar chart.
What size sample would be required to estimate the proportion of unemployed college students if we want the margin of error not to exceed 5 percent?
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The average 1-ounce chocolate chip cookie contains 110 calories. A random sample of 15 different brands of 1-ounce chocolate chip cookies results in the following calorie amounts. At a=0.01 level
At a large commercial bakery, one of the measures familiar with evaluate employees is the number of broken cookies per 1000 produced. The quality control department wants to determine if there is a relationship between years of experience and bro..
Probability of Landing Number 10 on Two Dices
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