Please help questions are both only multiple choice
1.) Recipes for the same type of co...
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Mathematics, 03.04.2020 19:29 breannaasmith1122
Please help questions are both only multiple choice
1.) Recipes for the same type of cookies can vary in terms of ingredients and baking times. From a collection of chocolate chip cookie recipes, a baker randomly selected 5 recipes. From a collection of oatmeal raisin cookie recipes, the baker randomly selected 4 recipes. The mean baking times, in minutes, for each sample were recorded as x¯C and x¯O, respectively. What is the correct unit of measure for the standard deviation of the sampling distribution of x¯C−x¯O?
A Minutes
B Minutes squared
C Recipes
D Number of Raisins
E Number of Chocolate Chips
2.)For a weekly town council meeting in a certain town, the distribution of the duration of the meeting is approximately normal with mean 53 minutes and standard deviation 2.5 minutes. For a weekly arts council meeting in the same town, the distribution of the duration of the meeting is approximately normal with mean 56 minutes and standard deviation 5.1 minutes. Let x¯1 represent the average duration, in minutes, of 10 randomly selected town council meetings, and let x¯2 represent the average duration, in minutes, of 10 randomly selected arts council meetings. Which of the following is the best reason why the sampling distribution of x¯1−x¯2 can be modeled by a normal distribution?
A The sample sizes are equal.
B Both sample sizes are large enough to satisfy the normality condition.
C The population distributions are approximately normal.
D The population standard deviations are assumed equal.
E The sample sizes are less than 10% of the corresponding population sizes
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