Based on the data below, the Cronbach’s alpha coefficient is Subject Item 1 Item 2 Item 3 Item 4 1 3 5 3 3 2 2 2 2 3 3 6 5 3 6 4 5 3 5 5 5 3 4 4 4 a. excellent b. good c. acceptable d. questionable
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Based on the data below, the Cronbach’s alpha coefficient is
Subject Item 1 Item 2 Item 3 Item 4 1 3 5 3 3 2 2 2 2 3 3 6 5 3 6 4 5 3 5 5 5 3 4 4 4 a. excellent
b. good
c. acceptable
d. questionable
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- A community may be considered sociologically healthier the more variability there is in its housing values (up to a point). A major newspaper in one city investigated housing costs in several communities in its area and is running a story on its findings. For one of the communities, a random sample of 60 houses was examined, and the current market price of each house was determined. The newspaper published the following histogram summarizing these 60 prices. 20 15 10 5 0 Frequency 12 16 20 8 4 80 120 160 200 240 280 Current market price (in thousands of dollars) Based on this histogram, estimate the standard deviation of the sample of 60 prices. Carry your intermediate computations to at least four decimal places, and round your answer to at least one decimal place.A publisher of magazines for teenager's wishes to determine whether there is a relationship between the gender of a teenager and the type of the magazine that he/she prefer to read. A survey of 200 teenagers produced the following results: Gender Male Female Total Select one: a. 7.815 b. 5.991 Music 29 18 47 O c. 4.605 O d. 9.210 e. 3.841 Type of Magazine Clothes 32 25 57 Performing the Chi-squared test at a 10% level of significance to determine whether there is a relationship between the gender of the teenager and magazine preference, determine the critical value of the test. Gadgets 59 37 96 Total 120 80 200The following table is from a publication. The individuals in the following table have an eye irritation, a nose irritation, or a throat irritation. They have only one of the three. Is there sufficient evidence to reject the hypothesis that the type of ear, nose, or throat irritation is independent of the age group at a level of significance equal to 0.05? Age (years) Type of Irritation 18-29 30-44 45-64 65 and Older Eye 422 560 340 54 Nose 932 1324 802 101 Throat 247 309 142 24 (a) Find the test statistic. (Round your answer to two decimal places.)(ii) Find the p-value. (Round your answer to four decimal places.)(b) State the appropriate conclusion. Reject the null hypothesis. There is not significant evidence that this sample contradicts the claim of independence.Reject the null hypothesis. There is significant evidence that this sample contradicts the claim of independence. Fail to reject the null hypothesis. There is not significant…
- 1) a.What is/are the appropriate measure(s) of central tendency for each of the variables in Columns B-F? Explain your answers in no more than two sentences each. b. Calculate the measures of central tendencies above c. Imagine that a 21st run is added to your dataset. See the table below for its data Run Eth. Gly. Acid. Temp pH 21 18.2 7.2 2.1 18 4.2 d. Do these data points change your choices of central tendency reported in Question 2b? Explain your answer. Attached dataset; a b c d e f Run Ethanol Glycerol Acidity Temp pH 1 4.8 3.5 0.84 24 3.8 2 9.6 7.3 0.27 24 3.8 3 10.2 7.2 0.27 24 3.8 4 8.5 5.1 0.55 24 3.8 5 7.3 3.2 0.68 24 3.1272 6 4.8 1.2 1.24 30 4.2 7 7.9 4.4 0.65 18 3.4 8 6.7 4.3 0.65 30 3.4 9 9.8 6.9 0.47 24 3.8 10 10.2 7.2 0.32 24 3.8 11 9.8 5.8 0.51 24 3.8 12 10.2 7.5 0.28 24 3.8 13 8.2 5.1 0.49 18 4.2 14 7.1 3.9 0.6 18 3.4 15 8.2 4.8 0.46 13.908 3.8 16 5.6 3.3…The following histograms were derived using the same data on cycles to failure of aluminum test coupons. Compare the histograms. Do both display similar information? Histogram 8 bins: Histogram of Cycles to failure (8 bins) 18 16- 14- 12 10- 1250 1500 1750 2000 2250 500 750 1000 Cycles to faikure of aluminum test coupons Histogram 16 bins: Histogram of Cycles to failure (16 bins) 144 12 10- 800 1100 1400 1700 Cycles to faikure of aluminum test coupons 200 500 2000 2300 a. Yes, both give similar information. The mean value is located in the class interval having the largest frequency O b. Not similar information considering the number of bins are different. But both are not symmetric in shape O. Somewhat similar information. However the shape is similar and both are not symmetric O d. Yes, both give similar information. Both graphs are also not symmetric 2. Aouanbay Frequency5. A team leader tracks the number of items produced by three workers who each work on three different machines for three different days. Here are the data: Data Worker Machine 1 1 15 16 19 12 13 8 12 14 11 17 14 18 7 11 10 12 9. 20 18 17 8 10 11 13 10 11 Using a=0.05, test the following claims: a. The machine used has no effect on the number of items produced. b. The choice of worker has no effect on the number of items produced. c. The interaction between worker and machine has no effect on the number of items produced. 3. 2. 3.
- For the following data 5,6,8,9 o = 2.1 Then C.V.= Select one: O a. 21.1% O b. 33.3% O c. 38% O d. 30%The following is data about the hemoglobin concentrations of volunteers collected at sea level and at an altitude of 11000 feet. sea level concentrations = [14.70 , 15.22, 15.28, 16.58, 15.10 , 15.66, 15.91, 14.41, 14.73, 15.09, 15.62, 14.92]11000 feet concentrations = [14.81, 15.68, 15.57, 16.59, 15.21, 15.69, 16.16, 14.68, 15.09, 15.30 , 16.15, 14.76] There are two alternative scenarios about the way the data were obtained. In scenario 1, there are 12 volunteers who lived for a month at sea level, at which time blood was drawn and the data in "sea level concentrations" dataset were obtained. Subsequently, all 12 volunteers were moved to 11000 ft and after a month the data in the "11000 feet concentrations" dataset obtained. There is a one to one correspondence between the numbers in the two datasets, that is the first numbers correspond to volunteer1, the second numbers to volunteer2 etc. In scenario 2, the "sea level concentrations" dataset is a random sample obtained from 12…Attitude towards old age and depression was studied in a group of ten old people and following is the data obtained. Calculate the decree of relatedness of attitude towards old age and depression. Subjects: 1 2 3 4 5 6 7 8 9 10 Attitude Towards Old Age: 15 12 16 14 17 18 14 16 19 18 Depression 27 26 34 29 36 36 30 35 40 38
- Consider the partially completed ANOVA summary table below. Complete parts a through d below. Source df SS MS F Regression 1 400 Residual Total 9 1100 a. Complete the remaining entries in the table. Source df SS MS F Regression 1 400 nothing nothing Residual nothing nothing nothing Total 9 1100 b.How many ordered pairs are in this sample? c. Calculate the sample coefficient of determinatio d. Using α=0.05, what conclusions can be made about the population coefficient of determination? Determine the null and alternative hypotheses. Choose the correct answer below. A. H0: ρ2≤0 H1: ρ2>0 B. H0: ρ2>0 H1: ρ2=0 C. H0: ρ2<0 H1: ρ2≥0 D. H0: ρ2≥0 H1: ρ2<01. Consider the following data set: -2 -1 0 1 4. 3 3 1 Calculate ở2, Var(Bo) Var(B,) and se(B), without using any statistical software.
