One measure of variation that we can look at is the Range when we have continuous variables. We will be using this measure to create a histogram. A histogram is used to show the frequencies of certain events or categories of data values in a set of data from one time period. Data are plotted in increasing or deceasing order based on the frequency count for each data categories.
Assignment I
Below is a data file containing the average number of minutes it took to code inpatient records each day in the health information management department. Data were collected for 30 days.
Average Time to Code Inpatient Records (minutes)
1 30
2 31
3 30
4 27
5 32
6 33
7 31
8 29
9 28
10 34
11 29
12 30
13 27
14 31
15 28
16 30
17 32
18 29
19 31
20 30
21 28
22 26
23 28
24 30
25 33
26 30
27 31
28 29
29 32
30 31
Calculate the range in coding times (highest to lowest) for the time period and the average number of minutes for the time period.
Use your calculations to create a histogram of the data
Assignment II
A hypothesis test is an example of:
Descriptive statistics
Inferential statistics
A measurement of spread
Data mining
If an analyst collects data to determine if the mortality rate at her facility is different from the state average ps, what are the appropriate null and alternative hypotheses?
a. HO:p=ps vs HA: pps
b. HO:pps vs HA: p=ps
HO:p=ps vs HA: p>ps
HO:p≥ps vs HA: p<ps
In hypothesis testing, a type I error is:
The probability of correctly accepting the null hypothesis
The probability of incorrectly rejecting the null hypothesis
The probability of incorrectly accepting the null hypothesis
The probability of incorrectly rejecting the alternative hypothesis
An analyst wishes to test the impact of a new patient schedule system in the radiology department by comparing the number of MRI tests performed before and after implementation. What statistical test should be used?
T-test
Two-sample t-test
ANOVA
Paired t-test
What is the median of the following numbers: 3, 9, 2, 5, 5
3
9
1
5
What is the range of the following numbers: 3, 9, 2, 5, 5
5
7
9
2
The first step in hypothesis testing is:
Determining the test statistic
Setting the acceptable probability of Type I error
Determining the null and alternative hypotheses
Collecting the data
If a 95 percent confidence interval for a facility’s mortality rate is 5 percent +/-1 percent or (4 percent, 6 percent), would a 90 percent confidence interval for the same sample be:
Wider
Narrower
The same width
Not enough information
If a null hypothesis is rejected at an alpha level of 0.05, which of the following statements is true:
It will be rejected at alpha level 0.01
It will not be reject at alpha level 0.01
It will be rejected at alpha level 0.1
Not enough information to respond.
ANS) Type 1 error in testing a hypothesis is incorrect rejection of a true null hypothesis
ANS) HYPOTHESIS TEST IS AN EXAMPLE OF inferential stastics
ANS ):- MEDIAN :- midian is nothing but the middle number that is seperating the upper half numbers from the lower half
3,9,2,5,5,3,9,1,5 arrang them inan order
1,2,3,3,5,5,5,9,9 divide the numbers into two halfs and then calculate the middle number
here the median is 16
RANGE :- firstly arrange the data in a correct order
data is ;3,9,2,5,5,5,7,9,2
seq; 2,2,3,5,5,5,7,9,9
select highest and the lowest point
highest point is 9 and the lowest point is 2
range =highest - lowest
range = 9-2=7
THE FIRST STEP OF TESTING THE HYPOTHESIS IS stating a null hypothesis
the ull hypothesis isopposite to the guess the research made
the next step of research testig is stating an altenative hypothesis
type 1 error is the thired step
collect the data
calculate the result
construct acceptance and rejection regions
then draw a conclusion about the hypothesis
ANS) it will be wider
ANS )if a null hypothesis is rejected with thesignificance level of 0.05 thenit will also rejectedwith the significance level of 0.01
One measure of variation that we can look at is the Range when we have continuous...
1. A hypothesis test is an example of: a.Descriptive statistics b.Inferential statistics c.A measurement of spread d.Data mining 2. If an analyst collects data to determine if the mortality rate at her facility is different from the state average ps, what are the appropriate null and alternative hypotheses? a. HO:p=ps vs HA: pps b. HO:pps vs HA: p=ps c. HO:p=ps vs HA: p>ps d. HO:p≥ps vs HA: p<ps 3. In hypothesis testing, a type I error is: a. The probability...
One measure of variation that we can look at is the Range when we have continuous variables. We will be using this measure to create a histogram. A histogram is used to show the frequencies of certain events or categories of data values in a set of data from one time period. Data are plotted in increasing or deceasing order based on the frequency count for each data categories. Assignment I Below is a data file containing the average number...
One measure of variation that we can look at is the Range when we have continuous variables. We will be using this measure to create a histogram. A histogram is used to show the frequencies of certain events or categories of data values in a set of data from one time period. Data are plotted in increasing or deceasing order based on the frequency count for each data categories. Assignment I Below is a data file containing the average number...
α is the probability of a Type I error, which occurs when we accept the alternative H1 when the null hypothesis Ho is true. True False A Type II error occurs when when a false null hypothesis is rejected. True False If a null hypothesis is rejected at the 5% significance level but not at the 1% significance level, then the p-value of the test is less than 1%. True False The power of a test is the probability of...
1. In testing hypotheses, the researcher initially assumes that the alternative hypothesis is true and uses the sample data to reject it. True False 2. The first step in testing a hypothesis is to establish a true null hypothesis and a false alternative hypothesis. True False 6. The power curve provides the probability of Correctly accepting the null hypothesis Incorrectly accepting the null hypothesis Correctly rejecting the alternative hypothesis Correctly rejecting the null hypothesis 7. Suppose that Ho: μ ≤...
Pls answer these questions 17 Causal research designs are experimental. TRUE FALSE 18 Pure research is also referred to as basic research. TRUE FALSE 19 Results from a qualitative research study can be generalized to a population. TRUE FALSE 20 Hypothesis tesing is used to prove facts. TRUE FALSE 21 An independent variable is also known as a predictor variable. TRUE FALSE 22 A dependent variable is also known as an outcome variable. TRUE FALSE An alternative hypothesis is a...
1. A random sample of 29 BSN nurses at a large Michigan hospital have the average (mean) hourly wage of $37.55 with the standard deviation of $4.66. If we want a 99% confidence interval to have a margin of error of no more than $3, what is the minimum required sample size we should take? (Hint: use t*=2.7633) 2. A test of the hypotheses H0: mu=17 vs. Ha: mu >17 is conducted. Sample data of n=30 cases provides x-bar=14 with...
1. A random sample of 29 BSN nurses at a large Michigan hospital have the average (mean) hourly wage of $37.55 with the standard deviation of $4.66. If we want a 99% confidence interval to have a margin of error of no more than $3, what is the minimum required sample size we should take? (Hint: use t*=2.7633) 2. A test of the hypotheses H0: mu=17 vs. Ha: mu >17 is conducted. Sample data of n=30 cases provides x-bar=14 with...
One of the important features of a camera is the battery life as measured by the number of shots taken until the battery needs to be recharged. The data shown in the table below contain the battery life of 10 subcompact and 10 compact cameras. Complete parts (a) through (c). Subcompact 49 50 25 28 31 33 39 57 47 57 Compact 70 30 60 35 55 39 59 46 52 68 . Assuming that the population variances from both...
1a. A random sample of 29 BSN nurses at a large Michigan hospital have the average (mean) hourly wage of $37.55 with the standard deviation of $4.66. If we want a 99% confidence interval to have a margin of error of no more than $3, what is the minimum required sample size we should take? (Hint: use t*=2.7633) 1b. A test of the hypotheses H0: mu=17 vs. Ha: mu >17 is conducted. Sample data of n=30 cases provides x-bar=14 with...