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Make use of the traditional method with α = 0.05 to test the claim that the weights of statistic textbooks vary more than the weights of text in general: σ = 0.65kg. A simple random samp
A Study was conducted with α = 0.01 to conclude if there is significant linear correlation between the number of credits hours earned at the same time of taking Statistic 101 and grade in the
Examine the sample set of statistics using the statistical test of my choosing. The data corresponds to the group of clients suffering with the mental illness.
Find the proportion of the total variation that can't explain by the linear relationship between the two variable. (Round to the nearest whole percent.)
Find out the critical values X2/L and X2/R for a 90% confidence level and n=19. Utilize a Chi-Square Distribution table.
A human resources director, on learning regarding the regression effet, decides to hire people who have been fired by their previous employer for the poor performance.
Do one of the following as appropriate" find the critical value Zα/2, find out the critical value tα/2, or state that neither the normal nor the t distribution applies.
Employ the expected collision claim amount to find out the collision insurance premium that would let the company to break even on collision portion of policy.
Assume that you bought (randomly select) three laptops from the production run of 10 laptops. Of 10 laptops, 9 are destined to last at least two years without needing the single repair.
Find out the mean and standard deviation for number of actual voters in groups of 1002. In survey of 1002 people, 701 said that they voted in last presidential election (based upon data from ICR Rese
Supposing that 50% of all people are opposed, determine the probability of getting at least 89% opposed in the survey of 1012 randomly chosen people.
In the recent years, scores on standarized test for high school students with the 3.5 to 4.0 grade point average were normally distributed, with the mean of 39.9 and standard deviation of 1.8.
Fit the linear regression model by using SPSS for bp against sodium. Do you think this is a model with the good fit? Why. Is sodium a significant predictor for blood pressure (bp)? Why?
The life span of battery is normally distributed, with mean of 2400 hours and standard deviation of 40 hours. What percent of batteries have the life span that is more than 2470 hours?
Let us further assume that there was good interrater reliability on these frequency counts of behaviors and that they're interval or ratio level of measure, normally distributed, and independent obs
The director of marketing resources from the RLS inc company which deals with production of high speed and very high capacity circuit cards employed exclusively for high end computers gathered the f
The football coach randomly chosen ten players and timed how long each player took to carry out the certain drill. The times (in minutes) were:
A researcher has conducted the 99% confidence interval that is 10 points wide, based upon the sample of 36 scores.
Sex differences in "openness to experience" were studied by administering the quantitative test of this characteristic to 7 men and 5 women (higher the score, less open to experience).
A developmental psychologist is determining problem solving capability in children. Random samples of 7, 9, and 11 year olds children are obtained with the n=8 in each sample and each child is given
Assume that 300 students who're fans of TV show "The Office" are sampled and 231 of them had GPAs higher than 2.5. Then 400 students who dislike that TV show are sampled and 272 of them have GPAs hi
On the standardized test of mathematical ability, Jorge scored 45 and Lisa scored a 39. The distribution of test scores for population is normal, with mean of 30 and standard deviation of 5.
75 Democrats and 60 Republicans were surveyed on their support of the gun control legislation using the standardized measure (high scores representing greater support of gun control).
The manager at lightbulb factory wants to find out whether there is any difference in mean life expectancy of bulbs manufactured on two different kinds of machines. The population standard deviation
The manager of 2 resort properties was interested in any significant difference in willingness of guests to return to the 2 properties.