题目内容
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[主观题]
The rejection and not rejectance regions are divided by a point called the _______.
A、dividing point
B、critical value
C、rejection value
D、not rejectance value
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发布时间：2022-01-07
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A、> 5
B、5
C、n = 60
D、< 5
题目内容
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更多“The rejection and not rejectan…”相关的问题
第1题
Jennifer Cantu, Customer Services Manager at Tri-Nation Auto Insurance, monitors the claims processing time of the claims division. Her standard includes ‘a mean processing time of 5 days or less’. Each week, her staff checks for compliance by analysing a random sample of 60 claims. Jennifer’s alternative hypothesis is ________.
第2题
The probability of committing a Type II error is represented by _______.
A、a
B、b
C、1 – a
D、a / 2
第3题
Consider the following null and alternative hypotheses. Ho: 
£ 352 Ha: 
> 352 These hypotheses _______________.
£ 352 Ha: > 352 These hypotheses _______________.
A、are not mutually exclusive
B、are not collectively exhaustive
C、do not reference a population parameter
D、are established correctly
第4题
The manufacturers of a deodorant claim that the mean drying time of their product is, at most, 15 minutes. A sample consisting of 16 cans of the product was used to test the manufacturer’s claim. The experiment yielded a mean drying time of 18 minutes with a standard deviation of 6 minutes. Test the claim at the 0.05 significance level.
A、Computed test statistic = 2 and is greater than 1.645, so reject H0: µ ≤ 15.
B、Computed test statistic = 2 and is greater than 1.96, so reject H0: µ ≤ 15.
C、Computed test statistic = 2 and is greater than 1.753, so reject H0: µ = 15.
D、Computed test statistic = 2 and is greater than 2.131, so reject H0: µ ≤ 15.
第5题
What happens to the rejection region if the level of significance is changed from 0.10 to 0.05?
A、it gets larger
B、it gets smaller
C、it does not change
第6题
A researcher wants to estimate the difference in the means of two populations. A random sample of 36 items from the first population results in a sample mean of 430. A random sample of 49 items from the second population results in a sample mean of 460. The population standard deviations are 120 for the first population and 140 for the second population. From this information, a point estimate of the difference of population means can be calculated as _______.
A、-30
B、46
C、43
D、-13
第7题
A researcher wants to estimate the difference in the means of two populations. A random sample of 36 items from the first population results in a sample mean of 430. A random sample of 49 items from the second population results in a sample mean of 460. The population standard deviations are 120 for the first population and 140 for the second population. From this information, a 95% confidence interval for the difference in population means is _______.
A、–95.90 to 35.90
B、85.44 to 25.44
C、–76.53 to 16.53
D、–102.83 to 42.43
第8题
A researcher wants to conduct a before/after study on 11 subjects to determine if a treatment results in any difference in scores. The null hypothesis is that the average difference is zero while the alternative hypothesis is that the average difference is not zero. Scores are obtained on the subjects both before and after the treatment. After subtracting the after scores from the before scores, the average difference is calculated to be –2.40 with a sample standard deviation of 1.21. Assume that the differences are normally distributed in the population. The degrees of freedom for this test are _______.
A、11
B、10
C、9
D、20
第9题
A researcher is performing a two-tailed related samples (matched pairs) t-test. A total of 12 people are in the sample, and before and after measures are taken. The observed t-value for this is –1.84. The level of significance is 0.05. The correct decision is to _______.
A、do not reject the null hypothesis
B、reject the null hypothesis
C、take a larger sample
D、use the z-table instead of the t-table
第10题
Cowra Construction Company purchases steel rods for its projects. Based on previous tests, Clarrie Carter, Quality Assurance Manager, has recommended purchasing rods from Redding Rods (population 1), rather than Stockton Steel (population 2), since Redding’s rods had less variability in length. Recently, Stockton revised it rod shearing operation, and Clarrie has sampled the outputs from Redding’s and Stockton’s rod manufacturing processes. The results for Redding were s12 = 0.10 with n1 = 8, and, for Stockton, the results were s22 = 0.05 with n2 = 10. Assume that rod lengths are normally distributed in the population. Clarrie’s alternate hypothesis is __________________.
A、s12 = s22
B、s12 ≠ s22
C、s12 > s22
D、s12 < s22
