Answer:
Step-by-step explanation:
given that the following data represent the discrete probability distribution for the number of stars that reviewers have a first edition statistics reference book.
Stars 5 4 3 2 1
Probability 25% 35% 20% 10% 10%
H0: Second edition is as per the above probabilities
Ha: atleast one is different from the above probability
(two tailed chi square test)
Alpha = 0.025
Assuming H0 to be true we calculate expected frequencies for total 80
chi square calculatons are shown below
df = 4
5 4 3 2 1 Total
Observed 28 28 13 6 5 80
Expected 20 28 16 8 8 80
chi square
(O_E)^2/E 3.2 0 0.5625 0.5 1.125 5.3875
p value =0.1455
Since p value >0.025, we accept H0
The expected requency of three-star reviews is ________.16
Answer:
-20 1/12
Step-by-step explanation:
Answer:
(-8, 6)
Step-by-step explanation:
Reflecting across x axis = (x, -y)
-(-6) = 6
A line segment is a line between its endpoints.
Answer:
48/7
Step-by-step explanation:
= 3 <u> </u><u>1</u><u> </u> × 2 <u> </u><u>1</u><u> </u>
5. 7
= <u> </u><u>1</u><u>6</u><u> </u> × <u> </u><u>1</u><u>5</u><u> </u>
5. 7
= <u> </u><u>2</u><u>4</u><u>0</u><u> </u> , if we divide both numbers by 5 we get;
35
= <u> </u><u>4</u><u>8</u><u> </u>
7