A.1. Open spreadsheet
2. In cell A1 type "success" as the label
3. Under that in column A, type 0 through 10 (these will be in rows 2 through 12)
4. In cell B1, type "one fourth"
5. In cell B2, type "=BINOM.DIST(A2,10,0.25,FALSE)" [NOTE: if you have Excel 2007, then the formula is BINOMDIST without the period]
6. Then copy and paste this formula in cells B3 through B12
7. In cell C1, type "one half"
8. In cell C2, type "=BINOM.DIST(A2,10,0.5,FALSE)"
9. Copy and paste this formula in cells C3 through C12
10. In cell D1 type "three fourths"
11. In cell D2, type "=BINOM.DIST(A2,10,0.75,FALSE)"
12. Copy and paste this formula in cells D3 through D12
2. Calculate descriptive statistics for the variable (Coin) where each of the thirty-five students flipped a coin 10 times. Round your answers to three decimal places and type the mean and the standard deviation in the grey area below.
3. List the probability value for each possibility in the binomial experiment calculated at the beginning of this lab, which was calculated with the probability of a success being ½. (Complete sentence not necessary; round your answers to three decimal places)
P(x=0) P(x=1) P(x=2) P(x=3) P(x=4) P(x=5) P(x=6) P(x=7) P(x=8) P(x=9) P(x=10)
4. Give the probability for the following based on the calculations in question 3 above, with the probability of a success being ½. (Complete sentence not necessary; round your answers to three decimal places)
P(x≥1) P(x<0) P(x>1) P(x≤4) P(4
5. Calculate (by hand) the mean and standard deviation for the binomial distribution with the probability of a success being ½ and n = 10. Either show work or explain how your answer was calculated. Use these formulas to do the hand calculations: Mean = np, Standard Deviation =
Mean = np:
Standard Deviation = :
6. Calculate (by hand) the mean and standard deviation for the binomial distribution with the probability of a success being ¼ and n = 10. Notate a comparison of these statistics to those from question 5 in a short paragraph of several complete sentences. Use these formulas to do the hand calculations: Mean = np, Standard Deviation =
Mean = np:
Standard Deviation = :
Comparison:
7. Calculate (by hand) the mean and standard deviation for the binomial distribution with the probability of a success being ¾ and n = 10. Notate a comparison of these statistics to those from question 6 in a short paragraph of several complete sentences. Use these formulas to do the hand calculations: Mean = np, Standard Deviation =
Mean = np:
Standard Deviation = :
Comparison: