Conduct a t-test at the .01 level.You are interested in the income of American adults. In your sample, there are 361 adults with a high school degree, with a mean $19,500 and a standard deviation $3,800. Test if the mean income of the high school degree holders is $20,000. Find the correct hypotheses. (A) H1: μ=20000 H0: μ≠20000 (B) H1: μ≠20000 H0: μ=20000 (C) H1: μ=19500 H0: μ≠19500 (D) H1: μ≠19500 H0: μ=19500
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Conduct a t-test at the .01 level.You are interested in the income of American adults. In your sample, there are 361 adults with a high school degree, with a
Find the correct hypotheses.
(A) H1: μ=20000 H0: μ≠20000
(B) H1: μ≠20000 H0: μ=20000
(C) H1: μ=19500 H0: μ≠19500
(D) H1: μ≠19500 H0: μ=19500
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- You want to obtain a sample to estimate how much parents spend on their kids birthday parties. Based on previous study, you believe the population standard deviation is approximately o = 24.3 dollars. You would like to be 99% confident that your estimate is within 10 dollar(s) of average spending on the birthday parties. How many parents do you have to sample? n =??In 2000 the average total charitable contribution in the United States (according to the IRS), as reported on tax returns, was $2,225 per household.Suppose you wanted to determine if the mean charitable contribution per household has changed since then. To test this, you sample 35 household tax returns from 2022 and find the following:The mean, ?̅, charitable contribution per household was $2,675, with a standard deviation, S, of $1,844.At the 0.05 level of significance, is there evidence to suggest the mean charitable contribution per household has changed since 2000? Step 1: Define the parameter & setup the testStep 2: State the Level of SignificanceStep 3: Find the value of the Test StatisticsStep 4: Find P-Value OR Find Critical ValueStep 5: State Conclusion and why
- please answer D E & FYou want to obtain a sample to estimate how much parents spend on their kids birthday parties. Based on previous study, you believe the population standard deviation is approximately o = 61.5 dollars. You would like to be 90% confident that your estimate is within 1.5 dollar(s) of average spending on the birthday parties. How many parents do you have to sample? n =In 1974, the mean height of a woman in the United States was 63.7 inches, with a standard deviation of 2.5 inches. What is the height of a woman who is taller than 88% of the rest of the sample? Enter your answer in inches rounded to one decimal place, e.g. 60.4.
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