A company wishes to test if the new software system installed improved the mean waiting time for a customer to talk to a service representative to less than 120 seconds. Is the following the correct hypothesis to test for this problem? H, :µ=120 H, : µ#120 Yes, this is the correct form of the hypothesis to test O NO, this is not the correct form of the hypothesis to test

Q: If r12= 0.8, 13= 0.4 and 123 = 0.56, find the value of r12.3, 132 and r23.1.

A: Given,r12=0.8 , r13=0.4 , r23=0.56

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A: *Answer:     

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Q: What do the MS values represent in an ANOVA?

A: ANOVA is Analysis of Variance.

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Q: Suppose a professor want to test the hypothesis that average scores on a national quiz for morning (...

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Q: 1. Among American women aged 20 to 29 years, 10% are less than 60.8 inches tall, 80% are between 60....

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Q: Example 2. If the relationship between two variables x and u is u + 3x = 10 and between two other va...

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Q: The weight distribution of parcels sent in a certain manner is normal with mean value 12 lb and stan...

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Q: 4. Which of the following descriptions about Central Limit Theorem is NOT essential? A. The larger t...

A: Solution: We have given that the statement about to the Central limit theorem.

Q: epare temperature on that day using z = 2.33. What probability, or level of confidence, will be atta...

A: We have given that the z-score z = 2.33

Q: & Obtain the regression equations from the data given below: 1 2 9 8 3 4. 6. 8 10 12 11 13 14 16 15 ...

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Q: CHAPTER 16 CLASSWORK 1. Find the mean for the following lists of numbers. (Round to the nearest tent...

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Q: The pulse rate of US adult males who jog at least 15 miles per week is (approximately) normally dist...

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Q: Example 3. For the variables x and y, the regression equations are given as 7x- 3y - 18 = 0 and 4x -...

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Q: For a 4-unit class like Statistics, students should spend average of 12 hours studying for the class...

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Q: It is known that 40% of the students in a certain college are girls and 50% of the students are abov...

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Q: 3. (Rosner book – Page 110, Q: Infectious Disease) A study considered risk factors of HIV infection ...

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Q: a) State the null and alternative hypotheses in words. b) Let p represent the proportion of all adul...

A: Test is that whether marriage rates in the United States have declined.

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Q: [item#2] Instructions: Write a description and analysis of the data based on the resulting table/gra...

A: “Since you have posted a question with multiple sub-parts, we will solve first three subparts for yo...

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Q: The age of managers in particular industry is normally distributed with mean μ=35. A group of 30 man...

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Q: 54.2, o = 7.8, X =60.2 and n = 76. This is an example of the sampling distribution of the sample mea...

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Q: The following data show the monthly rental price (in $) for a random sample of one-bedroom apartment...

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Q: Exit polling is a popular technique used to determine the outcome of an election prior to results be...

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Q: 1. (Witmer book – Page 116, Q: 3.6.12) Childhood lead poisoning is a public health concern in the Un...

A: Given: n = 16 p = 1/8 = 0.125  

Q: Match the Null Hypothesis to the mathmatical description:

A: Test is that whether the mean length of unemployment differs among the residents of two local commun...

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Q: Find the Quartile Deviation for the following data : 391, 384, 591, 407, 672, 522, 777, 733, 1490, 2...

A: Solution:

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Q: The following are the ratings of males by females construct a boxplot and identify the 5-number summ...

A: Given data is2.0,2.5,3.5,4.5,5.5,5.5,6.5,6.5,6.5,6.5,6.5,7.0,7.0,8.0,8.0,8.0,9.0,9.5,9.5,10.0Arrange...

Q: For a normal distribution, find the z- score for which a total probability of 0.71 falls more than z...

A: Solution-: Given: Probability of 0.71  falls more than z standard deviations (in either direction) f...