A. How would you characterize children’s
hospital?
It is an outlier
B. What should we do with Children’s If we are
interested in calculating the mean?
We must drop the Children hospital while calcuating the mean of the
hospitals in the region.
c. C. The mean proportion of Medicare cases is including children’s is 0.449. Without children’s it would be .465. The standard deviation is 0.131. Use a z test (two tails) to determine if children’s hospitals Medicare case los is significantly different from the regions mean at the 95% level of confidence. Decal that observed z is (observation mean) /standard deviation/square root of n. Why should we have anticipated this?
Hypothesis
In this case we use a two tail test.
Hence
Z = -17.49
Using a z table, we get the pvalue = 0
Hence since the pvalue is less than 0.025, we reject the null hypothesis and conclude that the medicare of children hospital is significantly different from the regions mean
(Decal that observed z is (observation mean) /standard deviation/square root of n. Why should we have anticipated this?) Unable to understand this.
D. Use a z test to determine if Jefferson regional hospitals Medicare case load is significantly different from the regions mean at the 95% level of confidence.
Hypothesis
In this case we use a two tail test.
Hence
Z = 4.7259
Using a z table, we get the pvalue = 0
Hence since the pvalue is less than 0.025, we reject the null
hypothesis and conclude that the medicare of JeffersonRegional is
significantly different from the regions mean
The critical value of z for 95% level of confidence is +/- 1.96 the picture of...
The confidence level in a confidence interval is established by A Z-value, such as 1.96 for a 95% confidence interval A t-value, using the appropriate degrees of freedom and the level desired The appropriate statistic for the test distribution The F statistic, using the appropriate degrees of freedom and the level desired
1000 Assessment 50 99% 2.57 Confidence Level 90% 95% Z-Score 1.65 1.96 A sample of 300 babies born at a hospital is surveyed. 85% are born on or after their due date. What is the margin of error at a 90% confidence error? 2.1% 8 5 2 +4.0% +3.4% 5.3% Ins 2. For a survey of 700 people in which 48% show support for an upcoming vote on a proposed constitutional amendment, what would be the margin of error at...
What is the critical value for 95% confidence level is
a hint to this question.
With 90% confidence, for sample mean 391.50, sample standard deviation 13.40, and sample size 35, what is the upper confidence limit with 2 decimal places?
Match the critical value with the confidence level. 2.576 1.96 1.645 2.326 1. 90% 2. 95% 3. 98% 4. 99%
Find the indicated critical z value. the value of zan that corresponds to a confidence level of 97 80% Use the given degree of confidence 2) Of 88 selected and sample data to construct a confidence interval for the population proportion p adults selected randomly from one town 69 have health insurance. Find a 90% confidence interval for the true proportion of all adults in the town who have health insurance the given degree of confidence and sample data to...
QUESTION 1 In constructing a 95% confidence level estimate of the mean when the population standard deviation () is known what will be your score used in the formula? QUESTION 2 In constructing a 99% confidence level estimate of the mean when the population standard deviation (a) is known what will be your score used in the formula? HINT. Be sure to review page 236 "Finding Z scores from Known Areas - Special Cases and Tabel A-2. QUESTION 3 In...
Find the critical value z, necessary to form a confidence interval at the level of confidence shown below C 0.92 Round to two decimal places as needed) We were unable to transcribe this imageWe were unable to transcribe this imageWe were unable to transcribe this image
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Find the critical value t for the confidence level c= 0.90 and sample size n=7. Click the icon to view the t-distribution table. 11 to (Round to the nearest thousandth as needed.) ters 5, 6, & 7 Time Ren 19 of 32 (24 complete) i t-Distribution Table - X Level of confidence, One tail, a Two tails, a d.f. d.r. 1 1 2 3 4 5 0.80 0.10 0.20 3.078 1.886 1.638 1.533 1.476 1.440 1.415 1.397 1.383 1372...
1. T/F a. If we increase our confidence level from 90 then to 95, interval will also increase for same the data. b. Correlation coefficient , and 'm' of regression equation are same. C. A statistical hypothesis is a statement and interpretation about a sample. d. To find the best-fit-line, the correlation coefficient of the paired data is a relevant information 10 T/F T/F T/F T/F 2. MCQ / Short questions a. A company claims that its car has mean...
cal values for quick reference during this activity. Confidence level Critical value 0.90 z* = 1.645 0.95 1.960 0.99 2.576 Jump to level 1 1 A poll reported 65% support for a statewide election with a margin of error of 4.33 percentage points. 2 How many voters should be sampled for a 95% confidence interval? Round up to the nearest whole number 4 Ex: 1234 voters 3 Check Next Feedback?