SPRPOSet that the population standard deviation has 21.2. or n'= 72 observatiöns, which provides a sample mean oPwn Vaug of o = 5.1. You obtain a sample Since the sample size x follows a normal distribution. large enough, you assume that the sample mean Crick on the blue dropdwn menus that föllow, and select the appropriate expressionš to öbtain the correct formūla for the test statistic for your hypothesis test: When the null,hypothesis is true , the test statistic for this hypothesis test follows which of the föllowing dištributions?

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1. Testing a population mean
The test statistic
You conduct a hypothesis test about a population mean u with the following null and alternative
hýpothéses:
Suppose that the population standard deviation has a known value of o = 5.1. You obtain a sample
öf h'= 72 0bšervations, which proVides a sample mean of x
Since the sample size
X follows a normal distribution.
large enough, you
assume that the sample mean
denote the hypothesized value of the population mean u when the null hypothesis iş true.
Click on the blue dropdown menus that follow, ang select the ăppropriate expressions to öbtain the
correct forműlă for the test statištic for your hypothesis test:
Let
When the null.hypothesis is true , the test statistic for this hypothesis test follows which of the
föllowing distributions?
O A normal distribution with mean 22.3 and standard deviation 5.1
O At distribution with 71 degrees of freedom
O At distribution with 72 degrees of freedom
O A normal distribution with mean 0 and standard deviation 1
The value of the test statistic is
Transcribed Image Text:1. Testing a population mean The test statistic You conduct a hypothesis test about a population mean u with the following null and alternative hýpothéses: Suppose that the population standard deviation has a known value of o = 5.1. You obtain a sample öf h'= 72 0bšervations, which proVides a sample mean of x Since the sample size X follows a normal distribution. large enough, you assume that the sample mean denote the hypothesized value of the population mean u when the null hypothesis iş true. Click on the blue dropdown menus that follow, ang select the ăppropriate expressions to öbtain the correct forműlă for the test statištic for your hypothesis test: Let When the null.hypothesis is true , the test statistic for this hypothesis test follows which of the föllowing distributions? O A normal distribution with mean 22.3 and standard deviation 5.1 O At distribution with 71 degrees of freedom O At distribution with 72 degrees of freedom O A normal distribution with mean 0 and standard deviation 1 The value of the test statistic is
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