Statistics Assignment | Professional Writing Services

1) If X is normally distributed with a mean of 30 and a standard deviation of 10, find P(30 ≤ X ≤ 47).a) 0.455b) 0.855c) 0.755d) 0.655e) 0.955f) None of the above   2) Find a value of c so that P(Z ≤ c) = 0.62.a) 1.31b) 0.31c) 0.81d) -0.31e) 0.69f) None of the above   Get Statistics homework help today Dr. PeterTOP ACADEMIC WRITER … Continue reading Statistics Assignment | Professional Writing Services

Statistics Assignment | Professional Writing Services

Draw inferences from the data. For this part you will need to use both the male and female data for your variable. Complete the following:Use the sample data to construct a 95% confidence interval for the mean of all males and interpret it in the context of the problem. Use the sample data to construct a 95% confidence interval for the mean of all females and … Continue reading Statistics Assignment | Professional Writing Services

Statistics Assignment | Professional Writing Services

The International Bottled Water Association says that Americans on the average drink 4.6 (8-oz.) servings of water a day.   Assume that the number of 8-oz. servings of water is approximately normally distributed with a standard deviation of 2 servings. (Give your answers correct to four decimal places.) (a) What proportion of Americans drink more than the recommended 8 servings? Get Statistics homework help today … Continue reading Statistics Assignment | Professional Writing Services

Hypotheses Assignment | Professional Writing Services

{1) Nut! and Alternative Hypotheses The following null and alternative hypotheses need to be tested:   HO 3 P1 = P2 He: p1 <1" 102 This corresponds to a left—tailed test, for which a…   Get Statistics homework help today Dr. PeterTOP ACADEMIC WRITER He has decades of experience in the education field and has served in the examination boards of some of the top … Continue reading Hypotheses Assignment | Professional Writing Services

Statistics Assignment | Professional Writing Services

section   # students writing exams    mean grade of students writing exams(%) 1                      50                                               55 2                     30                                               68 3                    20                                                75       calculate the combined grade of all the students writing exams Recall that mean = sum of scores divided by number of scores ⇒ sum of scores =frequency * meanSum of scores of class 1 = 50*55 = 2750Sum of scores of class … Continue reading Statistics Assignment | Professional Writing Services

Statistics Assignment | Professional Writing Services

Candidate Q is announced as ahead of the race by 49% with a plus or minus margin of error of 2 percentage points. The other candidate, Candidate Z, was shown to have 47% of the survey results with the same margin for error. In another survey taken the same day in a different location, Candidate Z is showing as leading by 49% over Candidate Q, … Continue reading Statistics Assignment | Professional Writing Services

Statistics Assignment | Professional Writing Services

A company wants to determine if its employees have any preference among 5 different health plans which it offers to them. A sample of 200 employees provided the data below. Find the critical value chi Subscript alpha Superscript 2χ2α to test the claim that the probabilities show no preference. Use alphaαequals=0.01. Round to three decimal places. Plan                 … Continue reading Statistics Assignment | Professional Writing Services

Probability Assignment | Professional Writing Services

5.70 The probability is 1 in 4,000,000 that a single auto trip in the United States will result in a fatality. Over a lifetime, an average U.S. driver takes 50,000 trips. (a) What is the probability of a fatal accident over a lifetime? Explain your reasoning carefully. Hint: Assume independent events. Why might the assumption of independence be violated? (b) Why might a driver be … Continue reading Probability Assignment | Professional Writing Services

Hypothesis Assignment | Professional Writing Services

If H0 is in reality false and it is legitimate to use a directional H1, which of the following will yield a more powerful test? 1. one-tailed alternative hypothesis 2. one-tailed or two-tailed alternative hypothesis will yield the same power 3. two-tailed alternative hypothesis 4. type of alternative hypothesis has no effect on power   Get Statistics homework help today Dr. PeterTOP ACADEMIC WRITER He … Continue reading Hypothesis Assignment | Professional Writing Services

Bias Assignment | Professional Writing Services

In an effort to figure out why application rates are slipping, your college decides to set up an experiment to determine why students who are interested in the college decide to enroll or not. The college decides to send out a questionnaire to everyone who submitted an application to the college in 2017. In this experiment, a survey was used to collect data. What potential … Continue reading Bias Assignment | Professional Writing Services