According to past data, the mean score on test 3 in STA2122 is 78 with a population standard deviation of 5 points. Suppose a random sample of 49 STA2122 test scores are taken. a) What information...


According to past data, the mean score on test 3 in<br>STA2122 is 78 with a population standard deviation<br>of 5 points. Suppose a random sample of 49 STA2122<br>test scores are taken.<br>a) What information about this sample allows us to<br>use the normal distribution for our sampling<br>distribution?<br>b) Calculate the standard error. Round to two places<br>for ease.<br>dWhat is the probability that the sample of 49 gives a<br>sample mean of 80 or higher? Show your calculator<br>function and entries. Round to 4 places.<br>Edit View lnsert<br>12pt<br>Par<br>

Extracted text: According to past data, the mean score on test 3 in STA2122 is 78 with a population standard deviation of 5 points. Suppose a random sample of 49 STA2122 test scores are taken. a) What information about this sample allows us to use the normal distribution for our sampling distribution? b) Calculate the standard error. Round to two places for ease. dWhat is the probability that the sample of 49 gives a sample mean of 80 or higher? Show your calculator function and entries. Round to 4 places. Edit View lnsert 12pt Par

Jun 07, 2022
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