Question

# Identifying individuals with a high risk of Alzheimer’s disease usually involves a long series of cognitive...

Identifying individuals with a high risk of Alzheimer’s disease usually involves a long series of cognitive tests. However, researchers have developed a 7-Minute Screen, which is a quick and easy way to accomplish the same goal. The question is whether the 7-Minute Screen is as effective as the complete series of tests. To address this question, Ijuin et al. (2008) administered both tests to a group of patients and compared the results. The following data represent results similar to those obtained in the study.

 Patient 7-Minute Screen Cognitive Series A 3 7 B 7 15 C 4 14 D 5 13 E 7 9 F 5 15 G 11 25

Compute the Pearson Correlation Coefficient for these data.

r =

Note: For all the calculations, if it is a decimal number with two or more than two places, leave only two decimal places after the decimal point and do not round.

A)If it is a negative correlation, please do not forget to include the negative sign.

B)The correlation is

Medium and Negative, Large and negative, Large and positive, Medium and positive

C) The alternative hypothesis in words for a two-tailed test is

Group of answer choices

A.The correlation between the scores on the 7-minute screen test and the scores on the cognitive series is significant

B.The correlation between the scores on the 7-minute screen test and the scores on the cognitive series is not significant

C.The correlation between the scores on the 7-minute screen test and the scores on the cognitive series is less than zero

D.The correlation between the scores on the 7-minute screen test and the scores on the cognitive series is different from zero

D) The null hypothesis in symbols for a two-tailed test is

A.H1: ρ = 0

B.H1: ρ ≠ 0

C.H1: r = 0

D.H1: r ≠ 0

E)

If we use a two-tailed test with α = .01, the critical r values are:

Group of answer choices

A.±0.833

B.±0.874

C.±0.754

D.±0.669

Group of answer choices

A.Reject the null hypothesis and conclude that there is a significant correlation between the scores on the 7-minute screen test and the scores on the cognitive series

B.Fail to reject the null hypothesis and conclude that there is a significant correlation between the scores on the 7-minute screen test and the scores on the cognitive series

C.Reject the null hypothesis and conclude that there is no significant correlation between the scores on the 7-minute screen test and the scores on the cognitive series

D.Fail to reject the null hypothesis and conclude that there is no significant correlation between the scores on the 7-minute screen test and the scores on the cognitive series

G)Report the results in APA

a)

 correlation r='Sxy/(√Sxx*Syy) = 0.79

The correlation is Large and positive

c)

D.The correlation between the scores on the 7-minute screen test and the scores on the cognitive series is different from zero

d)

A.H0 ρ = 0

e)

B.±0.874

f)

D.Fail to reject the null hypothesis and conclude that there is no significant correlation between the scores on the 7-minute screen test and the scores on the cognitive series

G) r(5) =0.79 ; p >0.01 ; not significant

#### Earn Coins

Coins can be redeemed for fabulous gifts.

##### Need Online Homework Help?

Most questions answered within 1 hours.

##### Active Questions
• List at least three examples of project management tools and explain their common application to projects....
asked 1 minute ago
• A 2.00 m long string has a mass of (A+1.50) g. A (B+25.0) g mass is...
asked 3 minutes ago
• Find an example within the media (newspapers, Oprah or other talk shows, news programming, magazines, the...
asked 13 minutes ago
• How is good data quality obtained? If reliable data is not available, what techniques can you...
asked 15 minutes ago
• A firm sells 120K units of product per year at \$20/unit. Variable production cost is \$12/unit....
asked 29 minutes ago
• Arrow Electronics is considering Projects S and L which are mutually exclusive, equally risky, and not...
asked 29 minutes ago
• Using MATLAB/OCTAVE, plot the vector field ?⃗=?2?̂−??̂ ?? ?ℎ? ??????−2<?<+2 ???−2<?<+2 Find the magnitude of the...
asked 29 minutes ago
• describe the fundamentals of metrology and some companies are doing to create a systematic approach to...
asked 34 minutes ago
• Jacob is a member of WCC (an LLC taxed as a partnership). Jacob was allocated \$150,000...
asked 36 minutes ago
• Determine the area required for a FWS constructed wetland used to treat primary treated wastewater with...
asked 36 minutes ago
• Sunny is 27 and is completing her bachelor's degree at an accredited college during 2019. She...
asked 41 minutes ago
• A parabolic reflector antenna having a circular opening of radius 0.35 m is used to focus...
asked 48 minutes ago