Answer:
101in
Step-by-step explanation:
9*5=45
9*4=36
5*4=20
45+36+20=101
Answer: r + 4
Step-by-step explanation:
Answer:
Approximately, the 90% confidence interval for the students' mean IQ score is between 129.045 - 130.956
Step-by-step explanation:
The formula to use to solve this question is called the Confidence Interval formula.
Confidence interval =
x ± z × ( σ/ (√n) )
Where:
x = the sample mean = 130
z = the z-value for 90% confidence = 1.645
σ = standard deviation = 7
n = sample size = 145
130 ± 1.645 × (7/√145)
130 ± 0.9562687005
130 - 0.9562687005 = 129.0437313
130 + 0.9562687005 = 130.9562687005
Therefore, approximately, the 90% confidence interval for the students' mean IQ score is between 129.045 - 130.956
Answer:
88%
Step-by-step explanation:
Since the suitcase weighs 3kg,
weight left for packing
= 25 -3
= 22kg
Percentage left for packing
= 88%
The range of x is:<span>10≤x≤50</span>
The range of C is:<span><span>60≤C≤300</span></span>
