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When performing periodontal probing, how should the probe be…

When performing periodontal probing, how should the probe be oriented in relation to the tooth?  

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Two tooth buds that grow together to form one larger tooth i…

Two tooth buds that grow together to form one larger tooth is referred to as

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The daily calorie intake of adults has a population standard…

The daily calorie intake of adults has a population standard deviation of 500 calories. A random sample of 100 adults is selected. What is the standard deviation of the sampling distribution of the sample mean ?

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If a two sided test of hypothesis is conducted at a 0.05 lev…

If a two sided test of hypothesis is conducted at a 0.05 level of significance and the test statistic resulting from the analysis is z=0.92 . The conclusion is  :

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In testing the claim p > 0.30, the p-value of the test was f…

In testing the claim p > 0.30, the p-value of the test was found to be 0.6950. What is the value of the test statistic? Assume a large sample size. (Round to two decimal places.)

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A researcher wants to estimate the passing rate of Stats cou…

A researcher wants to estimate the passing rate of Stats courses at FIU with a margin of error of 3 % and a confidence level of 90 % . If the passing rate is believed to be around 70 % , what sample size is needed ? ( Use z=1.645)

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The ABC Light Bulb Company claims that their light bulbs hav…

The ABC Light Bulb Company claims that their light bulbs have an average lifespan of 900 hours, with a standard deviation of 100 hours. If the quality control team randomly selects 70 light bulbs for analysis , what is the probability that the average lifespan for the sample will exceed 920 hours? ( Round to two decimal places) 

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The weights of packages shipped by a company have a populati…

The weights of packages shipped by a company have a population mean of 40 pounds and a population standard deviation of 12 pounds. The distribution of individual package weights is strongly right-skewed. A random sample of 64 packages is selected.  What is the probability that the sample mean weight is less than 37 pounds? ( round to three decimal places)

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An educational researcher claims that the mean GPA for Psych…

An educational researcher claims that the mean GPA for Psychology students at a certain college is less than 3.2 . A sample of 49 Psychology students gave a mean GPA of 3.1 with a standard deviation 0.35 . What is the value of the test statistic used to test the claim ? ( Do not round)

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A survey claims that 9 out of 10 doctors (i.e., 90%) recomme…

A survey claims that 9 out of 10 doctors (i.e., 90%) recommend brand Z for their patients who have children. To test this claim against the alternative that the actual proportion of doctors who recommend brand Z is less than 90%, a random sample of 100 doctors results in 83 who indicate that they recommend brand Z. The test statistic in this problem is approximately (round to the nearest hundredth)

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