Given: A nutrition store in the mall is selling \"Memory Booster\" which is a co

Question

Given: A nutrition store in the mall is selling "Memory Booster" which is a concoction of herbs and minerals that is intended to improve memory performance. To test the hypothesized memory enhancement of the herbal mix, the now famous drug researcher, Dr. Mindfog, obtains a sample of 15 adult volunteers and has each person take the suggested dosage each day for 4 weeks. At the end of the four- week period, each individual takes a standardized memory test. In the general adult population, the standardized memory test is known to have a mean of 10, where higher scores demonstrate better performance on the test of memory. The scores for the 15 volunteers are 12, 11, 13, 15, 8, 11, 13, 15, 10, 9, 10, 16, 15, 11, 14 with = .01, complete step 4 of the hypothesis testing procedure, what decision and conclusion should the researcher make? O The researcher should retain Ho and conclude that there is no correlation between taking the herbs/minerals and actual memory The researcher should retain Ho and conclude that taking the herbs/minerals improves memory The researcher should reject Ho and conclude that there is a positive correlation between taking the herbs/minerals and actual memory

Explanation / Answer

The statistical software output for this problem is:

One sample T hypothesis test:
: Mean of variable
H0 : = 10
HA : > 10

Hypothesis test results:

Since p - value is less than 0.01, we reject Ho. Hence,

Option C is correct.

Variable Sample Mean Std. Err. DF T-Stat P-value Data 12.2 0.63395959 14 3.4702527 0.0019

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