Q1) One-Sample t-test JASP (14 points total)

I am shopping for a new small sedan and would like to get one with excellent miles per gallon (MPG). I heard that Japanese cars tend to be more fuel efficient than American cars, so I collected MPG data on a random sample of 10 Japanese small sedan cars (listed in the table below) to be compared to the American small sedan statistics. I would like to see if there is a significant difference, in either direction, between Japanese small sedans and American small sedans. The significance level is = .05 for a two-tailed hypothesis test.

Hint: We do not know the population mean for the American cars orthe standard deviation, so we cannot conduct a z-test and should perform a one-sample t-test instead. Since we don't have a population mean, leave the "test value" in JASP as the default (i.e., 0).

Japanese car	MPG
1	29
2	32
3	30
4	28
5	27
6	34
7	30
8	35
9	32
10	36

Q1a. Information about the hypothesis test:

- What is the dependent variable in this hypothesis test? [0.5 point]

- What is the "sample" for this one-sample t test? [0.5 point]

- What is the target population represented by the sample? [0.5 point]

- What is the comparison population? [0.5 point]

Q1b. What would be the null and alternative hypotheses in both words and symbol notations for my analysis? [2 points total: 0.5 for null and 0.5 for alternative written format and 0.5 for null and 0.5 for symbol notation]

	Written	Symbolic Symbol bank for copy & pasting: = < > m
Null		H0:
Alternative		H1:

Q1c. Use JASP to calculate the sample mean. Round the result to the hundredth (2^nd place to the right of the decimal). [1 point]

Q1d. Use JASP to calculate the standard deviation. Round the result to the hundredth (2^nd place to the right of the decimal). [1 point]

Q1e. Use JASP to calculate the standard error (standard deviation of the sampling distribution) [1 point]

Q1f. Use JASP to calculate the t statistic for the sample. Since we don't have a population mean, leave the "test value" in JASP as the default (i.e., 0). Round to the hundredth (second decimal place). [1 point]

Q1g. Use JASP to calculate the degree of freedom [1 point]

Q1h. What is the p value? Compare the p value to the alpha. Is the t-test significant? Based on this comparison, do we "reject" or "fail to reject" the null hypothesis? [3 points: 1 point for each answer]

Q1i. Interpret the result in 1 sentence to answer the research question. RQ = Is there is a significant difference between Japanese small sedans and American small sedans? (you may use the wording of the hypothesis or explain it in your own words). [1 point]

Q1j. Use JASP to calculate effect size of this hypothesis test. State the effect size and explain your conclusion of the strength of this test.Round the result to the hundredth (2^nd place to the right of the decimal). [1 point: .5 effect size and .5 conclusion]